The emergency stop engine

 

(57) Abstract:

The invention relates to engine, in particular to control systems for internal combustion engines. The invention allows to simplify the design of the device, to improve the reliability, durability and efficiency of the engine. The emergency stop of the internal combustion engine consists of a body, the tip associated with the lever of the fuel high-pressure pump, lock, balls, springs and electromagnet. The fuel system also includes a device having a housing and a spring-loaded valve, hydraulically associated with oil and fuel systems, and mechanical - with the electromagnet, the latter has an electric connection with an on-Board network of the tank through the switch. 2 Il.

The invention relates to the field of armored vehicles, in particular, the power plant tanks.

Known analogues provide a stop of the engine only when the alarm system of collective protection (VHC) or by clicking on the button "Emergency stop engine".

Meanwhile, the known mechanisms of engine stop (MOD) do not respond to other perturbations, in particular, on the fall deoa. Thus, to ensure the stop of engine in case of reducing the pressure of the oil is necessary to develop a special automatic device.

Of the analogues studied as a prototype of the mechanism chosen engine stop T-72 tank (see Tank T-72. Technical description and operating instructions. The second book. M : Voenizdat, 1975, S. 99-101), consisting of a body, the tip associated with the lever of the fuel high-pressure pump, lock, balls, springs and electromagnet.

Analysis of the military operation of armour BBT shows that one of the main causes of engine failure is his work without oil due to the destruction of the rubber plugs (UTD-20) or oil pump drive (In-84-1), oil leaks, etc.

To improve the reliability of the engine during a military operation on the industry regularly carry out work on the identification and study of defects in engines, develop measures for their elimination and implement these activities in serial production. Thus, the engine of the T-72 oil system has an alarm limit pressure, consisting of a sensor, installed at the eighth Korennoy oil pressure at the eighth pole below 0,04 MPa lights up the bulb on the remote control, indicating the need to stop operation of the engine. All this contributes to improving the reliability and durability of the engine of the T-72.

However, the application of the device for automatic stop of engine in case of emergency (drop in oil pressure in the lubrication system) during operation, it may be more effective, as it ensures the prevention of the causes of failure.

Therefore there is an urgent need for the development and implementation of additional automatic features that increase the reliability of the engine during operation of the BBT.

The purpose of this technical solution is the development of a mechanism emergency stop of engine in case of a decrease in oil pressure in the oil system below an acceptable value by setting the fuel system optional devices having a housing and a spring-loaded valve, hydraulically associated with oil and fuel systems, and mechanical - with the electromagnet, the latter has an electric connection with an on-Board network of the tank through the switch.

The proposed device is shown in Fig.1. It consists of a body 1, C is as layout devices emergency stop of the engine.

Emergency stop device of the motor 4 (see Fig.2) is installed between the fuel fine filter 3 and the fuel high-pressure pump 2, which ensures a quick stop of the engine 1 in the case of reducing the oil pressure in the oil system by stopping fuel supply to the engine.

The valve device emergency stop is mechanically connected with the electromagnet 5, which has an electric connection with an on-Board network via the switch 6.

The operation of the device is as follows. Before starting the engine after long Parking cars fuel system is pumped by pump BCN-1 or manual priming pump RNM-1, for which the distribution arm of the crane is set to "Tanks on and turns on the switch 6. When this button air release valve shall be recessed. With the inclusion of the switch 6 on-Board voltage is supplied to the coil of the electromagnet 5. As a result, the armature of the electromagnet, compressing the spring 3 (see Fig.1), moves the spool 2 and connect the fuel channel in the valve from the pipeline, providing a supply of fuel from the filter to the pump pressure.

After UD is l starts the engine and turns off the switch 6, obestochena the coil of the electromagnet. And after starting the engine and putting it on mode minimum steady speed idling speed grip manual feed valve 2 under the action of oil pressure (above 0.1 MPA) remains in the same position, compressing the spring 3 and providing a supply of fuel to the injection pump.

When the engine is at operational speed of the crankshaft (n=1600-1900 min-1) the oil pressure in the oil system is 0.5-1.0 MPa, which securely holds the spool 2 in the position shown in Fig. 1. When this channel "a" of the valve 2 remains associated with the fuel pipe and connects the filter with the fuel high-pressure pump.

In the case of reducing the oil pressure in the oil system for a variety of reasons below 0.2 MPa valve 2 under the action of the spring 3 moves, blocking your body the fuel pipe. The fuel supply is stopped and the engine stops.

After identifying the cause of reduced oil pressure and Troubleshooting the engine is started. To do this, you must re-enable toggle switch 6, to pump fuel system as described above, start the engine and turn off the toggle switch experiment confirmed the feasibility of its use in power installations of tanks and BMPs to prevent engine failure while reducing oil pressure during operation.

The simplicity of the device allows its implementation without special economic costs through modernization of the BBT and the creation of new power plants.

Adjustment of the spring 3 (see Fig.1) (0.2 MPa or 0.04 MPa) depends on the location of the connection of emergency stop of the engine oil system.

The emergency stop of the internal combustion engine, consisting of a body, the tip associated with the lever of the fuel high-pressure pump, lock, balls, springs and electromagnet, characterized in that the fuel system also includes a device having a housing and a spring-loaded valve, hydraulically associated with oil and fuel systems, and mechanical - with the electromagnet, the latter has an electric connection with an on-Board network of the tank through the switch.

 

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