Low-pressure waste gas recirculating system based on supercharged engine

A technology of exhaust gas recirculation and recirculation system, applied in the direction of exhaust gas recirculation, engine components, engine control, etc., can solve problems such as reduction, slow combustion speed, unfavorable engine thermal efficiency, etc., to increase gas temperature, increase temperature, improve Effects on Engine Efficiency

Inactive Publication Date: 2017-05-31
ZHEJIANG GEELY POWERTRAIN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, during the operation of the above-mentioned Miller and/or Atkinson cycle engine, this cycle method reduces the temperature of the gas in the cylinder before the engi

Method used

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  • Low-pressure waste gas recirculating system based on supercharged engine
  • Low-pressure waste gas recirculating system based on supercharged engine
  • Low-pressure waste gas recirculating system based on supercharged engine

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Embodiment Construction

[0024] Such as figure 1 As shown, the approximate flow path of fresh air in the engine system is (some engine system conventional components are not marked in the figure): fresh air enters the engine intake pipe 6 through the mixing valve 12, the compressor 5, and then passes through the intake manifold The distribution of the fuel enters the engine and burns in the engine to do work. The combusted gases leave the engine exhaust pipe 7 and pass through the turbine 1 . The turbine 1 and the compressor 5 are components of a turbocharger. Turbine 1 uses the inertial momentum of the exhaust gas discharged from the engine to drive the turbine in the turbine chamber, and the turbine drives the coaxial impeller, which presses and sends fresh air, which is pressurized by the compressor 5 and enters the engine cylinder. The exhaust gas, having performed work in the turbine 1 , leaves the turbine 1 and enters the downstream catalytic converter 2 . The catalytic converter 2 can conver...

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Abstract

The invention provides a low-pressure waste gas recirculating system based on a supercharged engine. The supercharged engine comprises a gas inlet side and a gas compressor arranged on the gas inlet side. The low-pressure waste gas recirculating system comprises a waste gas recirculating loop, an auxiliary waste gas recirculating loop and a controller; the waste gas recirculating loop is used for introducing part of waste gas exhausted out of a Miller and/or Atkinson circulating engine into the gas inlet side through the gas compressor for reburning; the auxiliary waste gas recirculating loop is used for introducing part of the waste gas exhausted out of the Miller and/or Atkinson circulating engine into the gas inlet side for reburning on the condition that the gas compressor is not used; the controller is used for controlling the waste gas to selectively flow through the waste gas recirculating loop and the auxiliary waste gas recirculating loop according to the vehicle driving speed. According to the low-pressure waste gas recirculating system based on the supercharged engine, part of the waste gas exhausted out of the engine can enter an air cylinder for reburning through the gas compressor or not through the gas compressor under the different conditions, therefore, the gas temperature in the air cylinder before stroke compressing and the gas temperature at the beginning of burning can be increased, then the engine efficiency is improved, and the waste gas recirculating rate is increased.

Description

technical field [0001] The invention relates to the field of automobile engines, in particular to a low-pressure exhaust gas recirculation system based on a supercharged engine. Background technique [0002] A supercharged engine is an engine equipped with a turbocharger. The first is that the intake port of the turbine is connected to the engine exhaust manifold, and the exhaust port of the turbine is connected to the exhaust pipe. Then the air inlet of the compressor is connected with the air filter pipe, the exhaust port of the air compressor is connected with the intake manifold, and finally the turbine and the impeller are installed in the turbine and the compressor respectively, and the two are coaxially rigidly connected. It uses the inertial momentum of the exhaust gas discharged from the engine to drive the turbine in the turbine chamber, and the turbine drives the coaxial impeller, which presses and sends fresh air into the cylinder. The main function of turbocha...

Claims

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Application Information

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IPC IPC(8): F02M26/04F02M26/42F02D21/08F02D41/00
CPCF02D21/08F02D41/005F02D41/0077F02D2021/083F02D2200/04F02D2200/101Y02T10/12Y02T10/40
Inventor 李连豹韦虹杨林周华程旷云龙李双清王瑞平
Owner ZHEJIANG GEELY POWERTRAIN CO LTD
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