RU207444U1 - Military Tracked Diesel Engine with Boost Control Device - Google Patents

Abstract

The utility model relates to mechanical engineering, in particular to engine building, and can be used to improve the efficiency of a turbocharger of a diesel engine of military tracked vehicles. The technical result of the proposed utility model is to increase the throttle response of a diesel engine with a gas turbine supercharging while maintaining acceptable parameters of the overall power of the power plant. of the proposed utility model is achieved by the fact that in a diesel engine of a military tracked vehicle with a boost control device containing inlet and outlet manifolds, a turbine, a compressor driven by it, an air filter connected through an air duct to a compressor, a bypass valve control unit, according to the utility model, at the inlet manifold, two bypass valves are installed, one of which redirects the air compressed by the compressor through the pipeline connecting the compressor discharge pipe with the exhaust manifold to the inlet of the nozzle turbine apparatus, and the second provides power to the engine with air through the pipeline connecting the intake manifold with the air filter, the bypass valve control unit is electrically connected to the accelerator pedal position sensor and the crankshaft speed sensor. with gas turbine supercharging, and, as a result, to improve the main indicators of the mobility of a military tracked vehicle, while maintaining acceptable indicators of the overall power of the power plant.

Description

The utility model relates to mechanical engineering, in particular to engine building, and can be used to improve the efficiency of a turbocharger of a diesel engine of military tracked vehicles.

Known device for regulating diesel boost, containing a turbocharger with a turbine running on exhaust gases and a compressor, the pressure pipe of which is communicated with the diesel cylinders through the receiving receiver, the resonant pipeline and intermediate tanks, combining each inlet pipes of no more than four cylinders with non-overlapping intake phases (USSR author's certificate No. 946411, class F02B 27/00, 1982). The receiving receiver is equipped with a safety valve adjusted to the admissible pressure in the intermediate tank. The valve has a spring-loaded shut-off element, the cross-section of which is linearly dependent on its stroke. The turbocharger is selected to provide a sufficiently high diesel engine torque at a reduced crankshaft speed.

The disadvantage in the known device is that the applied regulation does not exclude conditions for the occurrence of mismatches in the flow characteristics of the turbocharger and the piston engine due to the lagging behind the acceleration of the turbocharger from the acceleration of the crankshaft in transient modes of operation, which leads to a decrease in operational economic and power indicators.

The known system (Patent for utility model RU No. 101093 IPC F02B 37/04, F02B 37/14, published on 01/10/2011), taken as a prototype, containing an internal combustion engine, a turbine, a compressor, an air filter connected through an air duct with a compressor, a muffler connected through the exhaust pipe to the turbine, the bypass valve of the exhaust gas channel, the exhaust gas receiver, in which the energy of the exhaust gases is accumulated, the bypass valve of the receiver, a one-way valve installed in the bypass channel of compressed gases from the receiver to the turbine and the bypass valve control unit. One of the disadvantages of this system is the presence of a sufficiently large exhaust gas receiver. The power plant with this system has low overall power, as a result of which it is difficult to use it on military tracked vehicles.

The technical result of the proposed utility model is to increase the throttle response of a diesel engine with a gas turbine supercharging while maintaining acceptable parameters of the overall power of the power plant.

The technical result of the proposed utility model is achieved by the fact that in a diesel engine of a military tracked vehicle with a boost control device containing inlet and outlet manifolds, a turbine, a compressor driven by it, an air filter connected through an air duct to a compressor, a bypass valve control unit, according to the utility model, two bypass valves are installed on the intake manifold, one of which redirects the air compressed by the compressor through the pipeline connecting the compressor discharge pipe with the exhaust manifold to the inlet of the turbine nozzle apparatus, and the second supplies the engine with air through the pipeline connecting the intake manifold with the air filter, control unit bypass valves are electrically connected to the accelerator pedal position sensor and the crankshaft speed sensor.

The proposal is illustrated by a diagram.

The proposed diesel engine of a military tracked vehicle with a boost control device contains: a diesel engine 1, a turbine 2, a compressor 3 driven by it, an air filter 4 connected through an air duct with a compressor, a bypass valve 5 of a pipeline 6 connecting the intake manifold 7 with an air filter, a bypass valve 8 of the pipeline 9 connecting the compressor discharge pipe to the exhaust manifold 10, the accelerator pedal position sensor 11, the crankshaft speed sensor 12 and the bypass valve control unit 13.

The proposed model works as follows.

With the uniform movement of a military tracked vehicle, air through the air filter 4 enters compressor 3, is compressed in the compressor and, under the required pressure through the intake manifold 7, enters the cylinders of engine 1 (the turbocharger is calculated for one operating point at which it operates with maximum efficiency , as the design point, the characteristic point of the engine characteristic is selected, near which the predominant modes of its operation are located), the bypass valves 5 and 8 are in a closed state. After the working process in the cylinders of the engine 1, the exhaust gases through the exhaust manifold 10 are fed to the turbine 2. The exhaust gases are driven into rotation by the turbine 2 and then through the exhaust pipe are discharged into the atmosphere.

When the engine is idling, light loads or when the engine is braking (when the driver reduces the amount of fuel supply), the command from the crankshaft speed sensor 12 and the accelerator pedal position sensor 11 is sent to the bypass valve control unit 13, which opens the bypass valve 5 and 8 and compressed air from the discharge pipe of the compressor 3 through the pipeline 9 is supplied to the turbine 2. The engine is supplied with air from the atmosphere through the pipeline 6.

When accelerating (starting movement) of a military tracked vehicle, the driver acts on the fuel supply pedal (increases fuel supply), a signal is sent from the crankshaft speed sensor 12 and the accelerator pedal position sensor 11 to the bypass valve control unit 13, which closes the bypass valves 5 and 8, thus the entire air flow is directed from the compressor 3 to the intake manifold 7 of the engine 1. Due to the fact that at idle, at low loads or during engine braking, the speed of the rotor of the turbocharger 2 is increased, its acceleration to rated speed is faster, and thus Thus, a larger amount of fresh air charge enters the cylinders, which is necessary for the combustion of an increased amount of fuel supplied by the driver when accelerating (starting to move) a military tracked vehicle.

In comparison with the prototype, the proposed technical solution allows to increase the throttle response of a diesel engine with a gas turbine supercharging, and, as a consequence, to improve the main indicators of the mobility of a military tracked vehicle, while maintaining acceptable parameters of the overall power of the power plant.

Claims (1)

A diesel engine of a military tracked vehicle with a boost control device, containing intake and exhaust manifolds, a turbine, a compressor driven by it, an air filter connected through an air duct to the compressor, a bypass valve control unit, characterized in that two bypass valves are installed on the intake manifold, one of which redirects the air compressed by the compressor through the pipeline connecting the compressor discharge pipe with the exhaust manifold to the inlet of the turbine nozzle, and the second supplies the engine with air through the pipeline connecting the intake manifold with the air filter, the bypass valve control unit is electrically connected to the pedal position sensor accelerator and crankshaft speed sensor.

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