Working machine with torque limitation for stepless transmission

FIELD: transport.

SUBSTANCE: invention may be used in working machines comprising internal combustion engine with stepless transmission. Working machine comprises ICE with output and stepless transmission engaged with ICE output. Stepless transmission features adjustable power input-to-power output ratio. Torque control input device controlled by operator outputs output signal. Said torque control input device is connected with one electric processing circuit configured to control ICE power output and power input-to-power output ratio depending upon aforesaid output signal of said torque control input device. Invention relates to method of operating said working machine.

EFFECT: stable engagement at low speed.

20 cl, 2 dwg

 

The present invention relates to work machines, and in particular to a work machine including an internal combustion engine combined with a continuously variable transmission.

A working machine, such as machine construction, machine for agricultural work or machine for forestry work, as a rule, includes an internal combustion engine. The internal combustion engine may be made in the form of either engine with compression ignition (i.e. diesel engine), or engine with spark ignition (i.e. gasoline engine). In the case of machines for heavy primary mover is made in the form of a diesel engine, having the best characteristics overload, intermittent motion and torque for the respective business operations.

The reaction of the internal combustion engine at the step load during the transition period after the impact load is a design feature that is most influenced by the working volume of the engine, engine parts (for example, depends on whether it has a standard turbocharger, the turbocharger bypass valve or variable geometry, etc) and strategy software for drive air and fuel actuators (for example, funds Retz is kuleli exhaust gases, turbocharger with variable geometry turbine (TIG), the configuration of the fuel injectors, etc) in relation to the requirements of the legislation on the toxicity of emissions (e.g., visible smoke, oxides of nitrogen (NOx), etc), requirements for noise or vibration.

System engines generally have a linear response during the application of the transition load. First, the load applied to the drive shaft of the internal combustion engine. The speed of the internal combustion engine is reduced when the load increases. On the fall speed of the engine is influenced by the fact whether the isochronous controller or has a lower speed. Air consumption increase, providing additional air flow into the internal combustion engine by changing the pneumatic actuators. To reach a new setpoint air flow required time delay. The amount of fuel injection occurring almost instantaneously increases compared to limit smoke, and to the maximum allowable amount of fuel. Then the engine is recovered, reaching a speed setpoint of the engine. Parameters associated with the motor response to a step load during the transition period after the impact load, are falling speed and time to recover before mentioned setpoint engines is El.

The internal combustion engine can be connected to a continuously variable transmission that provides an output speed continuously adjustable from 0 to maximum in a stepless manner. Continuously variable transmission generally includes hydrostatic and mechanical drive components. Hydrostatic components of the transforming power of a rotating shaft in hydraulic flow, and Vice versa. The flow of power through a continuously variable transmission can be carried out only through the hydrostatic components, only through mechanical components or by a combination of hydraulic and mechanical components, depending on the design and output speed.

One example of a continuously variable transmission for use in a working machine is a hydromechanical transmission which includes a hydraulic module, connected with the planetary gear. Another example of a continuously variable transmission for use in a working machine is a hydromechanical transmission which includes a hydraulic module, connected gear.

Working machine, comprising a continuously variable transmission may be affected by the loss of control traction and slippage of the wheels when the gear ratio continuously variable transmission change for the harmonization with the load conditions. The controller continuously variable transmission measures the speed of the engine and reduces the gear ratio continuously variable transmission, when the motor speed decreases under load. When moving on the ground at low speeds, the amount of power required for operating the machine is a small percentage of the power that can be generated by the engine so that the engine is not running with load, when the output torque transmitted from the engine increases. Then the operator will not be aware that the torque at the wheels is increased. In this case, the drive wheels can lose traction with the ground and suddenly stall. In some cases this is undesirable.

In the art the necessary working machine, the configuration of which provides for the presence of a continuously variable transmission and which is not affected by the loss of traction in motion at a low speed.

The invention in one form is dedicated production machine, comprising an internal combustion engine, having an output, and a continuously variable transmission connected to the output of the engine of the aircraft. Continuously variable transmission provides adjustable gear ratio input power/output power" (ACM/Wahm). Adjustable operator input device control cu is shining moment produces an output signal. With the device input torque control connected to at least one electrical processing circuit having a configuration that enables the output power of the internal combustion engine and/or attitude of ACM/Wahm variable transmission depending on the output signal from the device input torque control.

The invention in another form is devoted to the method of operating a working machine which includes an internal combustion engine, having an output, and a continuously variable transmission connected to the output of the engine of the aircraft. Continuously variable transmission provides adjustable gear ratio VCM/Wahm. The method includes the steps, which set the setpoint torque control associated with continuously variable transmission, using an adjustable operator input device torque control; generates the output signal from this device input torque control at least one electrical processing circuit and control output power of the internal combustion engine and/or attitude of ACM/Wahm variable transmission depending on the output signal from the device input torque control.

Further, the present invention will be described in more detail with reference to the accompanying the e drawings, on which:

Figure 1 - schematic representation of a variant of implementation of the working machine according to the present invention; and

Figure 2 - block diagram of the operational sequence of a variant implementation of the method of operation of the working machine according to the present invention.

Figure 1 shows a schematic representation of a variant of implementation of the working machine 10 according to the present invention. Work machine 10 may be a grader (road plane) or machine for construction work, such as front-end loader (loader front hydraulics) from the company John Deere, or a working machine of a different type, such as a machine for forestry, mining-mining or industrial operations.

The working machine 10 includes an engine 12 of an internal combustion engine, which is connected with the continuously variable transmission 14, in a typical case, via the output of the crankshaft 16 coming from the engine 12 of the aircraft. It is assumed that in the illustrated embodiment, the engine 12 is an internal combustion is a diesel engine, but it can also be a gasoline engine, an engine that runs on propane, etc. the Engine 12 is an internal combustion has a size and configuration corresponding to the application.

Continuously variable transmission 14 in the General case includes a hydraulic module 18 and the mechanical module 2 gear drive. It is assumed that in the illustrated embodiment, a continuously variable transmission 14 is a hydromechanical transmission, but it can also be hydrostatic transmission or a continuously variable transmission of a different type. Continuously variable transmission 14 may be of conventional construction, and therefore its detailed description here will not. Continuously variable transmission 14 has an output, which is connected at least with one located further in the kinematic chain component 22 of a gear drive transmission, which, in turn, is connected with many of the leading wheels 24, one of which is shown in figure 1. Of course, it should be clear that in case of operating a vehicle on tracks component 22 gear drive can be connected to the track in contact with the ground.

Continuously variable transmission 14 provides output power to one or more external loads 26, which, in turn, provide additional load on the engine 12 internal combustion engines. External load 26 in a typical case is presented in the form of hydraulic loads, such as motor front loader, boom back of the spade, auger for unloading grain, saws for felling trees, etc. Thus, the total load applied to the engine 12 NR the internal combustion is a function and traction loads, and external hydraulic loads.

Electrical processing circuit 28 given the configuration of one or more controllers. In the shown embodiment, the controller 28 includes the indicated position 30, the engine control unit (BUD), which provides electronic control of the engine 12 internal combustion and is connected to multiple sensors (not specifically shown)associated with the operation of the engine 12 internal combustion engines. For example, BUD 30 may be connected to the sensor that indicates the parameters of motor control, such as the air flow within one or more intake manifolds, engine speed, flow rate and/or synchronization of the fuel, the rate of recirculation of exhaust gases (EGR), the position of the blades of the turbocharger, etc. in Addition, BUD 30 may receive output signals from the indicated position 32 of the control unit of the vehicle (football BOOTS), showing the control parameters of the vehicle, entered by an operator, such as prescribed speed over ground (indicated by the position of the throttle lever or hydrostat) or the prescribed direction of the working the machine (indicated by the angular orientation of the steering wheel).

Similarly, the indicated position 34, the control unit is transmissie (PCM) provides electronic control of operation of the variable transmission 14 and is connected to multiple sensors, work-related variable transmission 14. BUD 30 and BOOTH 34 are connected to each other by the structure of the tire, providing two-way data flow, for example, it may be a bus 36 local circuit controllers (LC).

The device 40 input torque control allows the operator to adjust the torque transmitted from the variable transmission 14, which is controlled at least partially by controlling the output torque transmitted from the engine 12 internal combustion engines. In the shown embodiment, the device 40 input torque control has the configuration of the rotary scale of the instrument torque control, located within the remote operator position. Scale device 40 torque control can have visible lines, numbers, teeth, etc. in the range between the minimum setpoint torque control and maximum setpoint torque control. Alternatively, the input device torque control can be configured with an electronic touch screen, or any number of other configurations.

One can specify a maximum setpoint torque control is to reconcile this value with the maximum value of the torsional what about the torque or load torque curve for a given internal combustion engine, and with an output variable transmission at a predetermined transmission ratio VCM/Wahm. In other words, the maximum power output for the engine 12 internal combustion and a predetermined output power to the variable transmission 14.

For example, for a given internal combustion engine use a predefined torque curve, at which the torque (load) is a function of motor speed. The curve of the torque can be stored in memory or to carry out its defined dynamically using the given mathematical function. Such torque curves are well known in the art and are not illustrated here for brevity. The curve of torque used in the operation, determines the maximum output torque at a given speed of the engine. Thus, the possible number of torque, each corresponding to a different operating speed of the motor 12 internal combustion engines. Torque or load torque is a rotational force of a crankshaft of the engine, i.e. the output power. The motor speed is usually determined by the position of the throttle, electronic or mechanical. To get the corresponding torque of the engine, BUD 30 controls the development of one or more engine parameters to achieve the desired output torque, which is at or below the level of maximum torque to the operating speed. For example, BUD 30 may control the variable exhaust gas recirculation (EGR) system EGR (for example, the ratio of diluent to the amount of air), a managed element in the variable geometry turbocharger (TIG), the synchronization fuel injection and/or fuel pressure. Thus, it is possible with the help of the device 40 input torque control to set the maximum setpoint torque control that corresponds to the maximum load torque curve at a given operating speed or decimal number representing the maximum load value.

Therefore, the minimum allowable setpoint torque control at this lowest setpoint control is variable and depends on the current operating conditions. Therefore, by setting the torque control to change the desired torque between the minimum permissible setpoint and above the maximum value.

Although various electronic components, such as BUD 30, 32 BOOTS and BOOTH 34 shows the connection is United with each other using wired connections, it should also be understood that for certain applications, you can use wireless connections. In addition, some of the internal electronic connections for fluid inside components according to figure 1, not shown in order to simplify the image.

Now, with reference to figure 2, provides a more detailed description of a variant implementation of the method of operation of the working machine 10 according to the present invention. The block diagram of the sequence of operations shown in figure 2, can be agreed with most operating conditions, except for situations when the engine 12 is an internal combustion operates under idle or close to it, and in this case, the output power coming from the engine 12 is an internal combustion, is not limited.

The limit torque transmitted from the output variable transmission 14, the first set using the scale device 40 torque control (block 50). Setpoint scaling control unit corresponds to the desired output torque transmitted from the variable transmission 14. Less aggressive setpoint prevent slipping limiting ratio VCM/Wahm variable transmission 14 in some traffic conditions on the ground, and more aggressive setpoint increase Maxim the AUX torque. In the case of a hydro-mechanical transmission, turning the Vernier to achieve a less aggressive setting, effectively limits the pressure that is present in hydrostatic node that is directly connected with the gear.

During operation of BUD 30 controls the output power transmitted from the engine 12 is an internal combustion, depending on the specified torque limit (block 54). If the set limit torque is reached, then the rate of fuel supply to the engine 12 is an internal combustion limited (maintained constant), so that, in turn, reduce the amount of torque applied to the variable transmission 14, and thereby to limit the output torque transmitted from the variable transmission 14. This can cause a drop in motor speed. If the motor speed drops to a predetermined value of the number of revolutions at idle or is below this value, then increase the ratio of ACM/Wahm variable transmission to maintain a small value of the number of revolutions at idle. If the external load on the machine is not diminished, this process can be repeated until such time as the machine will not stop.

The method of operation according to the present invention can also make the approval of transient loads during operation (block 56 decision-making). If perceived transition load, such as an external hydraulic load, then a request is made on whether the torque output of the engine 12 is an internal combustion maximum (block 58 decision). If the engine 12 is an internal combustion already working with a maximum torque for a given motor speed, it is no longer possible to increase the torque transmitted from the engine 12 is an internal combustion, so, instead, increase the ratio of input power to output power (VCM/Wahm), provide continuously variable transmission 14 (block 60). On the other hand, if the engine 12 is an internal combustion does not work with a maximum torque for a given motor speed, the torque output of the engine 12 is an internal combustion increase to align with the transition load (block 62).

If transient load is not detected or transient load passes (line 64), the process continues as long as the engine 12 is an internal combustion will not be disabled (block 66 decision-making). When the engine 12 is an internal combustion continues to operate, control returns to block 50, where specifies the new or the old torque limit.

When carrying out the above method according to the present invented the second limitation of the input torque, transmitted from the engine 12 is an internal combustion, based on the given torque control limits the maximum output torque transmitted from the variable transmission 14, thereby providing the traction control in accordance with the needs of the operator in the current environment and maximize operating performance.

After describing the preferred option implementation will be obvious that within the scope of the claims of the invention defined by the following claims, it is possible to make various changes.

1. Working machine, containing
the internal combustion engine, having an output,
a continuously variable transmission connected to the output of the internal combustion engine, and the aforementioned continuously variable transmission provides adjustable gear ratio input power/output power" (ACM/Wahm),
adjustable operator input device torque control, issuing an output signal, and
at least one electrical processing circuit connected to the input device control torque and having a configuration that enables the output power of the internal combustion engine and/or attitude of ACM/Wahm mentioned variable transmission depending on closing the signal from the device input torque control.

2. The working machine according to claim 1, in which the input device torque control includes adjustable by the operator of the scaled device torque control.

3. The working machine according to claim 2, in which the scaled device torque control provides the minimum setpoint torque control and maximum setpoint torque control.

4. The working machine according to claim 3, in which the scaled device torque control indicates the maximum setpoint torque control at least one electrical processing circuit does not limit the power output of the internal combustion engine and increases the ratio of ACM/Wahm mentioned variable transmission to maintain the motor speed is inherent in the internal combustion engine, in terms of the transition load.

5. The working machine according to claim 3, in which the maximum setpoint torque control corresponds to the maximum torque at a given operating speed for the internal combustion engine.

6. The working machine according to claim 1, in which at least one electrical processing circuit includes an engine control unit (BUD)associated with the internal combustion engine, and/or the control unit of transmission (BOT)associated with the aforementioned continuously variable transmission.

7. the working machine according to claim 6, includes lever speed control associated with the said BOOTH and outstanding in his output, and configuration mentioned BOOTH provides control of the attitude of ACM/Wahm mentioned variable transmission depending on the output signal from the control lever speed.

8. The working machine according to claim 7, which includes a throttle valve associated with said BUD and outstanding in his output, and configuration mentioned BUD provides control of the output power of the internal combustion engine in dependence on the output signal from the throttle.

9. The working machine according to claim 6, in which the said BOUT receives the output signal from the input device, torque control, passes it mentioned in the BUD, and the BUD controls the output power of the internal combustion engine.

10. The working machine according to claim 1, in which at least one electrical processing circuit controls the output power of the engine by controlling the rate of fuel supply to the internal combustion engine.

11. The working machine according to claim 1, which represents one of the machines for construction work, machinery for agricultural work, machinery for forestry work, machines for mine-mine works and machines for industrial operations.

12. The method of operation of the working machine, includes an internal combustion engine (sun), having an output, and a continuously variable transmission (BT)connected to the output of the internal combustion engine, and the aforementioned continuously variable transmission provides adjustable gear ratio input power/output power" (ACM/Wihm)where:
set the setpoint torque control associated with continuously variable transmission, using an adjustable operator input device torque control, generates an output signal from the input device, the control torque in the at least one electrical processing circuit and control output power of the internal combustion engine and/or attitude of ACM/Wahm mentioned variable transmission depending on the output signal from the device input torque control.

13. The method according to item 12, wherein the input device torque control includes adjustable by the operator of the scaled device torque control.

14. The method according to item 13, wherein the scaled device torque control provides the minimum setpoint torque control and maximum setpoint torque control, with respect to VCM/Wahm mentioned variable transmission limit, when the scaled device control the population torque indicates a value below the maximum setpoint torque control.

15. The method according to 14, wherein, when the scaled device torque control indicates the maximum setpoint torque control, the output power of the internal combustion engine is not limited, and the ratio of ACM/Wahm mentioned variable transmission increases to maintain the motor speed is inherent in the internal combustion engine is in a transitional load.

16. The method according to 14, wherein the maximum setpoint for the control torque is the maximum torque for a given operating speed for the internal combustion engine.

17. The method according to item 12, in which control is performed using at least one of the engine control unit (BUD)associated with the internal combustion engine, and a control unit transmission associated with said continuously variable transmission.

18. The method according to 17, wherein:
set the control lever speed in accordance with the speed of the working vehicle relative to the earth,
give the output signal from the control lever speed in the above-mentioned BOTTLES,
control the attitude of ACM/Wahm mentioned variable transmission depending on the output signal from the control lever speed.

19. The method according to p, in which:
install throttle C is slonko in accordance with the operating speed of the internal combustion engine,
give the output signal from the throttle in the above-mentioned BUD and control the output power of the internal combustion engine using BUD depending on the output signal from the throttle.

20. The method according to 17, wherein the said BOUT receives the output signal from the input device, torque control, passes it mentioned in the BUD, and mentioned BUD controls the output power of the internal combustion engine.



 

Same patents:

FIELD: transport.

SUBSTANCE: invention relates to working machines with ICE engaged with stepless transmission. Working machine comprises ICE (1C) and stepless transmission (IVT) engaged therewith. At least, one sensor generates output signal representing ICE load in real time. At least, one data processing electric circuit serves to control transmission power subject to ICE threshold and real loads. In compliance with one version, at least, one data processing electric circuit includes ICE control unit (ECU) connected with ICE (1C), and transmission control UNIT (TCU) engaged with stepwise transmission (IVT). Engine control unit (ECU) feeds output signal to transmission control unit (TCU) that represents load in real time. Transmission control unit controls transmission power output subject to threshold load and real time load. Invention relates to method of operating said working machine.

EFFECT: ruled out ICE engine overload.

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FIELD: engines and pumps.

SUBSTANCE: piston engine comprises engine control system and valve timing phase variation system. Intake pipe houses blow valve while cylinder accommodates intake and discharge valves driven by camshaft. Blow receiver is arranged between blow valve and intake valve. In compliance with this invention, blow valve is opened by partial or complete displacement of throttle driven by common armature of several electromagnets in response to engine control system and valve timing variation system instructions, while intake and discharge valves are driven with no part of valve timing system. Note here that intake valve opens before blow valve to communicate combustion chamber with blow receiver but closes after, before or at a time with blow valve after BDC of intake stroke.

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FIELD: automotive industry.

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3 cl, 3 dwg

FIELD: motors and pumps.

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2 cl, 4 tbl

FIELD: mechanical engineering; internal combustion engines.

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1 dwg

FIELD: mechanical engineering; internal combustion engines.

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FIELD: transport.

SUBSTANCE: invention relates to working machines with ICE engaged with stepless transmission. Working machine comprises ICE (1C) and stepless transmission (IVT) engaged therewith. At least, one sensor generates output signal representing ICE load in real time. At least, one data processing electric circuit serves to control transmission power subject to ICE threshold and real loads. In compliance with one version, at least, one data processing electric circuit includes ICE control unit (ECU) connected with ICE (1C), and transmission control UNIT (TCU) engaged with stepwise transmission (IVT). Engine control unit (ECU) feeds output signal to transmission control unit (TCU) that represents load in real time. Transmission control unit controls transmission power output subject to threshold load and real time load. Invention relates to method of operating said working machine.

EFFECT: ruled out ICE engine overload.

17 cl, 3 dwg

FIELD: transport.

SUBSTANCE: invention relates to working machines with ICE engaged with stepless transmission. Working machine comprises ICE (1C) and stepless transmission (IVT) engaged therewith. At least, one sensor generates output signal representing ICE load in real time. At least, one data processing electric circuit serves to control transmission power subject to ICE threshold and real loads. In compliance with one version, at least, one data processing electric circuit includes ICE control unit (ECU) connected with ICE (1C), and transmission control UNIT (TCU) engaged with stepwise transmission (IVT). Engine control unit (ECU) feeds output signal to transmission control unit (TCU) that represents load in real time. Transmission control unit controls transmission power output subject to threshold load and real time load. Invention relates to method of operating said working machine.

EFFECT: ruled out ICE engine overload.

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FIELD: transport.

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7 cl, 7 dwg

FIELD: transport.

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EFFECT: higher operating performances of all systems.

7 cl, 7 dwg

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FIELD: transport.

SUBSTANCE: set of inventions relates to method and device for maneuvering on slope/ Proposed method comprises the step of generating command for storing characteristics of slope. Slope characteristics correspond to readiness of driver and transport facility for starting. Readiness is defined proceeding from physical parameters of transport facilities. In particular, physical parameter represents time of transport facility stop. Proposed device automatic parking brake, brake disengagement control means, slope inclination transducer, transport facility speed metres, gearbox in-state determination means, transport facility stop time determination means, accelerator pedal position determination means, clutch pedal position determination means, and computer. Transport facility incorporates above described device.

EFFECT: possibility to maneuver on slope.

11 cl, 5 dwg

FIELD: transport.

SUBSTANCE: set of inventions relates to method and device for maneuvering on slope/ Proposed method comprises the step of generating command for storing characteristics of slope. Slope characteristics correspond to readiness of driver and transport facility for starting. Readiness is defined proceeding from physical parameters of transport facilities. In particular, physical parameter represents time of transport facility stop. Proposed device automatic parking brake, brake disengagement control means, slope inclination transducer, transport facility speed metres, gearbox in-state determination means, transport facility stop time determination means, accelerator pedal position determination means, clutch pedal position determination means, and computer. Transport facility incorporates above described device.

EFFECT: possibility to maneuver on slope.

11 cl, 5 dwg

FIELD: transport.

SUBSTANCE: set of inventions relates to method and device for maneuvering on slope/ Proposed method comprises the step of generating command for storing characteristics of slope. Slope characteristics correspond to readiness of driver and transport facility for starting. Readiness is defined proceeding from physical parameters of transport facilities. In particular, physical parameter represents time of transport facility stop. Proposed device automatic parking brake, brake disengagement control means, slope inclination transducer, transport facility speed metres, gearbox in-state determination means, transport facility stop time determination means, accelerator pedal position determination means, clutch pedal position determination means, and computer. Transport facility incorporates above described device.

EFFECT: possibility to maneuver on slope.

11 cl, 5 dwg

FIELD: transport.

SUBSTANCE: invention relates to railway transport, particularly, to control over locomotive power plants. Proposed method consists in varying load at ICE at changing ICE shaft angular speed. Said load is decreased by reducing load at generator. Traction power is increased by adjusting current and voltage inverter and controller. Adjustment is carried out to allow discharging power accumulator in power circuit unless accumulated power reaches preset minimum magnitude. Transition process is controlled to allow charging said power accumulator. Said power accumulator is charged by stepwise increase in ICE shaft angular speed and exploiting traction generator free power. During said transient process, control system sets admissible minimum excess air factor.

EFFECT: higher efficiency.

4 dwg

FIELD: transport.

SUBSTANCE: invention relates to working machines with ICE engaged with stepless transmission. Working machine comprises ICE (1C) and stepless transmission (IVT) engaged therewith. At least, one sensor generates output signal representing ICE load in real time. At least, one data processing electric circuit serves to control transmission power subject to ICE threshold and real loads. In compliance with one version, at least, one data processing electric circuit includes ICE control unit (ECU) connected with ICE (1C), and transmission control UNIT (TCU) engaged with stepwise transmission (IVT). Engine control unit (ECU) feeds output signal to transmission control unit (TCU) that represents load in real time. Transmission control unit controls transmission power output subject to threshold load and real time load. Invention relates to method of operating said working machine.

EFFECT: ruled out ICE engine overload.

17 cl, 3 dwg

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