Method of starting of internal combustion engine

FIELD: engines and pumps.

SUBSTANCE: motor 1 and flywheel 2 are articulated and engaged with ICE shaft 3 via differential gear. Sun gear 4 of the latter is engaged with the shaft of motor 1, pinion 5 is engaged via carrier with flywheel 2 while crown gear 6 is engaged via idler 7 with ICE shaft 3. At starting, motor 1 is connected to power supply to make motor shaft spin and to lock differential gear by overrunning coupling 8 to accumulate the energy by flywheel 2. Then, motor 1 torque is changed to opposite one and, at a time, to unlock the differential gear. Invention allows ICE preliminary motoring and speeding up using one motor.

EFFECT: simplified starting.

7 cl, 2 dwg

 

The invention relates to the field of engine construction, namely, to start reciprocating internal combustion engines, transport vehicles, and is intended primarily for use in low temperatures.

There is a method of starting the internal combustion engine (ice), namely, that the motor rotates the shaft of the internal combustion engine and over time increase the speed of rotation (RF patent for the invention №2049261 on CL IPC-6: F02N 11/08, Appl. 08.07.1991,, publ. 27.11.1995, "System electrical starting of the internal combustion engine").

This method can be used to start a cold engine in winter conditions, as preliminary scroll shaft internal combustion engine with reduced speed allows you to heat the working surface of the cylinder and the piston due to gas forces and to reduce the viscosity of the oil on the friction surfaces, using power source with relatively small power. The disadvantage is that for the further promotion of the shaft of the internal combustion engine up to starting speed of rotation according to the invention is applied to capacitor battery of a large capacity, with correspondingly large dimensions and value.

There is also known a method of starting the internal combustion engine, which accelerates the flywheel motor and then through an electromagnetic clutch is ereaut torque from the flywheel to the shaft of internal combustion engine (copyright certificate of the Russian Federation No. 1562514 on CL The IPC-5: F02N 5/04, Appl. 25.07.1988,, publ. 07.05.1990, "Inertial starter").

The disadvantage of this method is that there is no pre scrolling shaft engine with a subsequent increase its speed of rotation. That decision to the contrary - speed rotation of the shaft of the internal combustion engine reaches its maximum at the initial stage of the scroll and then decreases as the expenditure of energy stored by the flywheel, and a significant part of this energy is lost slip in the electromagnetic coupling.

The closest to the essential features and selected as a prototype of the claimed invention is a method of starting an internal combustion engine with two electric motors and flywheel kinematically interconnected and shaft of the internal combustion engine through a differential mechanism, namely, that connect the motors to the power source, providing rotation of their shafts, carry out the accumulation of energy by the flywheel and change the torque of one of the motors on the opposite (copyright certificate of the Russian Federation No. 2189691 on CL IPC-7: H02P 5/50, H02P 1/54, F02N 11/08, Appl. 09.01.2001,, publ. 20.09.2002, "Method electric starting of the internal combustion engine").

In the specified manner the speed of rotation of the shaft of the internal combustion engine can vary according to a given law, while mehanicheskaya power at the shaft of the internal combustion engine may briefly exceed the capacity of the power source; the disadvantage is the increased complexity associated with the use of two electric motors.

Objective of the claimed method is a simplification of start of the engine.

The technical result achieved in the implementation of the claimed method, is to reduce the number of motors from two to one.

The solution of this problem is achieved by the fact that in the implementation of start of the internal combustion engine with an electric motor and flywheel, kinematically interconnected and shaft of the internal combustion engine through a differential mechanism, connected to the power source, the motor providing rotation of the shaft, carry out the accumulation of energy by the flywheel and change the torque of the motor on the opposite, and according to the claimed method was driven differential mechanism connected to the flywheel, the accumulation of energy by the flywheel exercise, locking differential mechanism, and remove the lock at the time of change of torque of the electric motor to the opposite.

The claimed method may be carried out so that to lock the differential mechanism is used by the overrunning clutch Assembly.

The claimed method may be carried out so that the differential mechanism is in the form of a planetary gear, solar sister the I which is connected to the motor shaft, and the crown gear with the shaft of the internal combustion engine.

The claimed method may be carried out so that the motor is made brushless, synchronous, with stabilization of torque, which provide on the opposite by changing the phase of the alternating current anchor winding.

The claimed method may be carried out so that as a power source using the battery of electrochemical capacitors.

The claimed method may be carried out so that drove a differential mechanism connected to the flywheel through the multiplier.

The claimed method can be performed so that the torque change of the motor on the opposite carry out the later, the lower the temperature of the surrounding air.

The differential lock mechanism allows a single motor to simultaneously rotate the flywheel and the shaft of the engine. The speed of rotation of the limited power output to the motor shaft.

Unlock the differential mechanism while torque change of the motor on the opposite allows you to increase the speed of rotation of the shaft internal combustion engine by summing (with certain coefficients) of the speeds of rotation of the carrier associated with the flywheel and motor. This mechanical power is here, used to rotate the shaft of the internal combustion engine increases for a short time due to the energy of the flywheel and exceeds the power output shaft of the electric motor.

Thus, the claimed method allows pre-rotation shaft engine with a subsequent increase its speed of rotation, using a single motor, unlike the prototype, where the two electric motors.

The claimed method meets the criterion of "industrial applicability"as the device for its implementation can be made in any enterprise, specializing in the industry, and this requires a known materials and standard equipment.

Studies on patent and scientific and technical information sources indicate that the claimed method from unknown investigated prior art and, therefore, meet the criteria of "novelty".

Not identified other solutions with the same set of distinctive features, as in the claimed process, i.e. the claimed method is not necessary for the expert in the obvious way from the prior art and meets inventive step.

The invention is illustrated by drawings, on which:

Figure 1 is a kinematic diagram of the implementation of the claimed method;

Figure 2 - graphs of speed of rotation of Esteren and drove differential mechanism in the scroll shaft engine without fuel.

The kinematic scheme of the implementation of the claimed method includes a motor 1, the flywheel 2, the shaft 3 DIC, differential mechanism, made in the form of a planetary gear with a sun gear 4, 5 satellites and a crown gear 6, the drive gear 7, the overrunning clutch 8. The sun gear 4 is connected to the shaft of the motor 1, 5 satellites through the led is connected to the flywheel 2, the crown gear 6 is connected with the drive pinion 7. The drive gear 7 is part of the standard for automotive starter drive mechanism (not shown) and is shown in engagement with a ring gear shaft 3 of the engine. The overrunning clutch 8 is installed between the sun gear 4 and a crown gear 6.

The motor 1 is preferably a brushless, synchronous with the mechanical characteristics, ensuring stabilization of torque throughout the range of operating speeds. Principles of construction of such motors are well known (Ovchinnikov I.E. Brushless electric motors and drive based on them (small and average power) / I.E. Ovchinnikov: a Course of lectures. - SPb.: CROWN-Century, 2006. - 336 S.: ill.). The motor 1 has the possibility of changing the direction of the torque by changing the phase of the alternating current anchor winding.

As the power source (on the Hema not shown) for the electric motor 1 can be used in particular, rechargeable battery, but since the claimed method is intended primarily for low-temperature conditions, preferably using a battery of electrochemical capacitors asymmetric design, able to provide long scrolling shaft of ice at temperatures down to -50°C.

To reduce the mass of the flywheel 2, the latter can be made high-speed. In this case, the carrier of the differential mechanism is connected to the flywheel 2 through the multiplier (step-up gearbox, the diagram 1 is missing).

Kinematic scheme works as follows.

In the initial state, the motor 1 is deenergized and stationary, the drive gear 7 is withdrawn from engagement with ring gear shaft 3 of the engine.

At the first stage drive gear 7 is introduced into engagement with the ring gear shaft 3 engine, then served voltage to anchor the coil of the motor 1. On the shaft of the motor 1 torque occurs mwiththe direction of which is such that the overrunning clutch 8 blocks of the differential mechanism, i.e. the speed of nwithninand ntoequal to, where nwith- the speed of the sun gear 4 and the shaft of the motor 1, nin- speed carrier and the flywheel 2, nto- the speed of the crown gear 6 connected with the shaft of internal combustion engine (figure 2: the time interval from 0 to 3). Is RA the twist of the flywheel 2 and the crown gear 6 to the maximum operating speed N of the motor 1. This speed is lower than the starting speed of NPwhere is the ignition of the mixture; a shaft of ice scroll, providing heating of the working surface of the cylinder and the piston due to gas forces and the reduction of oil viscosity on friction surfaces; the duration of the scroll increases when the temperature of the surrounding air, which helps to prepare the engine to start.

In the second stage, change the direction of torque on the shaft of motor 1 (figure 2: time t=3s). Speed nwiththe sun gear 4 begins to decrease, and the overrunning clutch 8 unlocks the differential mechanism; torque the crown gear 6 increases:

mto=kmwith,

where k is the gear ratio of the differential mechanism.

Speed ntothe crown gear 6 increases to a level where the static torque on the shaft of the internal combustion engine is equal to torque, then the speed of ntoto stabilize. This speed is higher than the starting speed of Npand, if served in the fuel, is ignited fuel mixture and start the engine.

If ignition of the mixture does not occur (as shown in figure 2), the scrolling shaft of the internal combustion engine at maximum speed is as long as the speed of nwiththe sun gear 4 is reduced to predelnoj the working level - N of the motor 1; while decreasing the speed of nindrove and flywheel 2, i.e. decreases stored therein kinetic energy, thereby increasing the mechanical power on the shaft of the engine. Thus one part of the energy of the flywheel 2 is transmitted through satellites 5 and the crown gear 6 on the shaft of the internal combustion engine; the other is through satellites 5, the sun gear 4 and the first motor 1 is charged by the power source (figure 2: the time interval from 3 to 3.5), as the motor 1 short-term moves in the generator mode, and then returns (2: after time t=3.5 seconds).

Thus, the claimed invention, not yielding to the prototype in terms of functionality and energy efficiency can be implemented using a single motor.

1. The method of starting the internal combustion engine with an electric motor and flywheel, kinematically interconnected and shaft of the internal combustion engine through a differential mechanism, which is connected to the power source, the motor providing rotation of the shaft, carry out the accumulation of energy by the flywheel and change the torque of the motor on the opposite, characterized in that the carrier of the differential mechanism is connected to the flywheel, the accumulation of energy by the flywheel carried the t, locking differential mechanism, and remove the lock at the time of change of torque of the electric motor to the opposite.

2. The method according to claim 1, characterized in that the locking differential mechanism is used by the overrunning clutch Assembly.

3. The method according to claim 1, characterized in that the differential mechanism is in the form of a planetary gear, a sun gear which is connected to the motor shaft and crown wheel with the shaft of the internal combustion engine.

4. The method according to claim 3, characterized in that the electric motor is made brushless, synchronous, with stabilization of torque, which provide on the opposite by changing the phase of the alternating current anchor winding.

5. The method according to claim 4, characterized in that as a power source using the battery of electrochemical capacitors.

6. The method according to claim 1, characterized in that the carrier of the differential mechanism is connected to the flywheel through the multiplier.

7. The method according to claim 1, characterized in that the torque change of the motor on the opposite carry out the later, the lower the temperature of the surrounding air.



 

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