RU214066U1 - TURBOCOMPRESSOR OF A DIESEL ENGINE OF A MILITARY TRACKED VEHICLE WITH A DEVICE FOR ROTOR ACCELERATION - Google Patents

Abstract

The proposal relates to engine building, namely to devices for improving the throttle response of a diesel engine of a military tracked vehicle. The technical result of the proposed proposal is to increase the efficiency of the turbocharger by eliminating the effect of "turbo lag". The technical result is achieved by the fact that a sealed hydraulic drive housing is installed between the turbine and the compressor, in which oil channels are made connecting nozzles located along the perimeter of the housing, supplying oil to the buckets of the Pelton turbine mounted on the same shaft with the wheels of the turbine and compressor.

Description

The proposal relates to engine building, namely to devices for improving the throttle response of a diesel engine of a military tracked vehicle.

A device for controlling the boost of a diesel engine is known, comprising a turbocharger with a turbine operating on exhaust gases, and a compressor, the pressure pipe of which is connected to the diesel cylinders through a receiving receiver, a resonant pipeline and intermediate tanks, each connecting the 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 allowable pressure in the intermediate tank. The valve has a spring-loaded locking element, the cross section of which is made according to a linear dependence on its stroke. The turbocharger is selected so as to provide a sufficiently high diesel torque at a reduced crankshaft speed.

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

Known system (Utility model patent RU No. 101093 IPC F02B 37/04, F02B 37/14, published 01/10/2011), containing an internal combustion engine, a turbine, a compressor, an air filter connected through an air duct to the compressor, a muffler connected through an exhaust a pipeline with a turbine, an exhaust gas channel bypass valve, an exhaust gas receiver in which the energy of the exhaust gases is accumulated, a receiver bypass valve, a one-way valve installed in the compressed gas bypass channel from the receiver to the turbine and a bypass valve control unit.

The disadvantage of this system is the presence in its composition of the exhaust gas receiver of a sufficiently large volume. The power plant with this system has low performance in terms of overall power, as a result of which its use on military tracked vehicles is difficult.

Of the studied analogues, a diesel engine of a military tracked vehicle was adopted as a prototype (Utility model patent RU No. 207444 IPC F02B 37/16, F02D 23/00, published on 28/10/2021) it is a compressor, an air filter connected through an air duct to the compressor, a bypass valve of the pipeline connecting the intake manifold to the air filter, a bypass valve of the pipeline connecting the compressor discharge pipe to the exhaust manifold, an accelerator pedal position sensor, a crankshaft speed sensor and a bypass valve control unit .

The disadvantage of this design is low efficiency due to an insufficient increase in the speed of rotation of the turbine and, as a result, a slight decrease in the effect of "turbo lag" (delay in the increase in air pressure in the engine inlet manifold due to the inertia of the increase in exhaust gas pressure in the turbine when the accelerator pedal is pressed sharply).

The technical result of the proposed proposal is to increase the efficiency of the turbocharger by eliminating the effect of "turbo lag".

The technical result is achieved by the fact that a sealed hydraulic drive housing is installed between the turbine and the compressor, in which oil channels are made connecting nozzles located along the perimeter of the housing, supplying oil to the buckets of the Pelton turbine mounted on the same shaft with the wheels of the turbine and compressor.

The proposal is illustrated by drawings, where figure 1 and 2 shows a schematic diagram of a turbocharger diesel engine of a military tracked vehicle with a device for accelerating the rotor.

The proposed turbocharger of a diesel engine of a military tracked vehicle with a device for accelerating the rotor contains: a turbine 1, a compressor 2 driven by it, a shaft 3 rotating on bearings 4 and 5 with the wheels of the turbine 1, the compressor 2 and the Pelton turbine 6 mounted on it and rigidly fixed with keyway. , a sealed housing 7 of the hydraulic drive, screwed rigidly and tightly connected to the turbine housing I and the compressor housing 2, nozzles 8 installed around the perimeter of the sealed housing 7 (see figure 2), fastened in it by a threaded connection, interconnected by an oil channel 9, oil to which is taken by means of an adjusting damper 10, fastened with screws to a sealed housing 7 and configured to be controlled from an electronic control unit 11 by a signal from an accelerator pedal position sensor 12 and a crankshaft speed sensor 13, a drain device 14, with a screw connection rigidly fastened at the bottom of the herme tic building 7.

The proposed turbocharger for a diesel engine of a military tracked vehicle with a device for accelerating the rotor works as follows.

When the engine of a military tracked vehicle is idling, at low loads, and also during uniform movement of the vehicle, the exhaust gases formed as a result of the working process in the engine cylinders drive the turbine wheel 1, which in turn ensures the operation of the compressor 2, and then through the exhaust pipe is vented to the atmosphere. Air through the air filter (not shown in the figure) from the atmosphere enters the compressor 2, is compressed in the compressor and enters the engine cylinders with excess pressure through the intake manifold (not shown in the figure).

At the beginning of the movement (acceleration) of the car, the driver acts on the fuel pedal (increases the fuel supply), the signal from the accelerator pedal position sensor 12 and from the crankshaft speed sensor 13 is fed to the electronic control unit 11. After processing by the electronic control unit 11, the signal enters the actuator - control damper 10, which, depending on the required speed of the compressor wheel 2, ensures the intake of lubricating oil from the engine oil line and directs the selected flow through the oil channel 9 to nozzles 8, which form a reactive oil jet on the Pelton turbine buckets 6, which helps to increase the torque on the shaft 3, reduce the acceleration time of the compressor 2 to the nominal speed, which allows minimizing the effect of "turbo lag" in the engine and significantly increasing the engine acceleration.

When the driver of the car ceases to act on the fuel supply pedal or when the engine is in steady operation, the control unit 11 reduces or completely stops the oil withdrawal by the control valve 10 and its supply to the channel 9 connected to the injectors 8.

Drainage of lubricating oil from the sealed housing 7 into the oil tank of the machine is carried out using a drain device 14.

Thus, the required speed of the turbocharger of the engine of a military tracked vehicle is provided by the kinetic energy of the engine lubricating oil, converted into rotation in the Pelton turbine 6, mounted on the same shaft with the wheels of the turbine 1 and the compressor 2.

Compared with the prototype, the proposed turbocharger for a diesel engine of a military tracked vehicle with a device for accelerating the rotor makes it possible to eliminate (minimize) the effect of "turbo lag" and, as a result, significantly increase engine response and improve basic mobility indicators.

Claims (1)

The turbocharger of a diesel engine of a military tracked vehicle with a device for accelerating the rotor, containing a turbine, a compressor driven by it, characterized in that it contains an adjusting damper, made with the possibility of control from the electronic control unit by a signal from the accelerator pedal position sensor and the crankshaft speed sensor, when At the same time, a sealed hydraulic drive housing is installed between the turbine and the compressor, in which an oil channel is made connecting nozzles located along the perimeter of the housing, supplying oil to the buckets of the Pelton turbine mounted on the same shaft with the wheels of the turbine and compressor.

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