SU1370283A1 - System for recirculation of used gases of internal combustion engine - Google Patents

Description

(21) 4089031 / 25-06

(22) 07/14/86

(P6) 01.30.88. Bul № 4

(71) Voroshilovgrad Machine-Building Institute

(72) H. G. Bannikov and A. G. Rybalchenko

(53) 621.43.068 (088.8)

(56) US Patent No. 4206606, cl. F 02 B 37/00, 1981.

(54) RECIRCULATING SYSTEM OF FULL GASES OF INTERNAL COMBUSTION ENGINE

(57) The invention improves the efficiency of reducing exhaust emissions. A temperature sensor 13 is installed in the exhaust pipe 2 in front of the recirculation pipe 7. In the recirculation pipe 7 in the zone

the bypass pipe is connected to a temperature sensor 12. The sensors are electrically connected to the actuator 9 of the valve through the comparator 11. When the engine switches to non-recirculated operating mode, the charge air enters through the pipeline 7 to the pipeline 2. Sensor I 2 cools. Sensor 13 Constantly in the exhaust gas flow, therefore, a voltage appears at the output of the comparator and the control device closes the valve 8. Further, the lower temperature of the sensor 12 is maintained due to The flow of air through the bypass pipeline 14. When working with recycling, the sensors 12 and 13 show the same temperature. 1 il.

(L

with

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The invention relates to mechanical engineering and can be used in internal combustion engines.

The purpose of the invention is to increase the efficiency of reducing toxicity from the working gases.

The drawing shows the exhaust gas recirculation system of the internal combustion engine,

The system contains inlet 1 and outlet 2 pipelines connecting engine 3 to compressor A by turbine 5, In suction pipe 1, a control valve 6 is installed, valve 8 is installed in recirculating pipe 7. Valve control device contains actuator 9, amplifier 10 and comparator 11, the system is equipped with temperature sensors 12 and 13, signals from coyr are fed to the input of the comparator 11, sensor 12 is installed in the recirculation pipe 7 at the location of

connecting the bypass pipe 14, the sensor 13 is installed in the exhaust pipe 2 in front of the branch node of the recirculation pipe 7,

The system works as follows. In engine operating modes with exhaust gas recirculation, valves 6 regulate the pressure in the intake pipe 1 according to a given law. Exhaust gases from the engine 3 through the exhaust pipe 2 enter the turbine 5 and the recirculation pipe 7, Sensors 12 and 13 washed with gases having the same temperature. In this case, the voltage at the output of the comparator is zero ;, Actuator 9 holds valve 8 in the open state.

When the engine goes to operating mode without recirculation of exhaust gases, the pressure in the intake manifold 1 increases and the charge air begins to flow through the conduit 7 into the exhaust manifold 2. A significant charge flow rate leads to a rapid cooling of the sensor 12. exhaust gases having a higher temperature appear at the outlet of the comparator 11. The control device closes the valve 8,

Subsequently, the temperature of the sensor 12 is maintained due to the flow of air through the bypass pipe 14. When the engine switches to the recirculated mode, the exhaust gases under the influence of the pressure differential start to flow from the outlet pipe 2 through the bypass pipeline 14 into the intake pipe. Sensors 12 and 13 record the same temperature. Valve 8 opens.

Claims (1)

Invention Formula The exhaust gas recirculation system of a turbocharged internal combustion engine, comprising a controllable flap installed in the intake manifold and an actuator valve located in the recirculation duct connecting the exhaust and intake manifolds, so as to increase efficiency exhaust emission, it is equipped with two thermal sensors, a comparator and a valve bypass, one of the sensors installed in the exhaust pipe in front of the Because of the return pipe and the other in the recycle pipe in the connection area of the bypass pipe, the sensors are electrically connected to the valve actuator through a comparator.