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Control method of engine system with egr line

An engine system and control method technology, applied in engine control, engine components, machines/engines, etc., can solve problems such as difficulty in further improving performance, achieve strong use value and application prospects, improve charging efficiency, and change The scope of the effect is small.

Active Publication Date: 2022-07-19
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current research design focuses on the design of the intake system and exhaust system. By changing the diameter and length of the intake manifold and exhaust manifold, the shape of the intake or exhaust pressure wave is affected, but there are bottlenecks in the design. Difficult to improve performance

Method used

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  • Control method of engine system with egr line
  • Control method of engine system with egr line

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Embodiment Construction

[0021] In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Please refer to figure 1 , figure 1 It is a schematic diagram of a specific embodiment of an engine system with an EGR pipeline provided by the present invention.

[0023] In this embodiment, the engine system specifically includes an air cleaner 1, an intake pipe 2, a throttle valve 3, an intake manifold 4, an engine body 5, an exhaust manifold 6, a three-way catalytic converter 7, an exhaust pipe 8, Muffler 9 , EGR intake pipe 11 , EGR valve 12 , EGR cooler 13 , EGR outlet pipe 14 .

[0024] The air cleaner 1, the intake pipe 2, the throttle valve 3, the intake manifold 4, the engine body 5, the exhaust manifold 6, the three-way catalytic converter 7, the exhaust pipe 8, and the muffler 9 are connected in sequence. O...

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Abstract

The invention discloses an engine system with an EGR pipeline and a control method. The EGR pipeline is provided with an EGR valve, and the intake end and the exhaust end of the EGR pipeline are respectively connected with the exhaust pipe and the exhaust pipe of the engine system. The intake pipe is connected, the intake end of the EGR pipeline is provided with an EGR intake valve, and the exhaust end is provided with an EGR outlet valve. In the solution of the present invention, the EGR intake valve and the EGR outlet valve are respectively added at both ends of the EGR pipeline, so that the exhaust pipe and the intake pipe can be disconnected when the opening and closing control of the two valves is performed without EGR. The passage of exhaust gas or intake air can be introduced into the EGR pipeline. Then, the influence relationship of the cavity of the existing EGR pipeline on the fluctuation characteristics of the intake and exhaust gas can be fully utilized. When the engine does not use EGR, the on-off of the cavity of the EGR pipeline can be controlled to change the intake and discharge of different speed intervals. Fluctuation characteristics of exhaust pressure waves.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an engine system with an EGR pipeline and a control method. Background technique [0002] Engine exhaust gas recirculation (Exhaust Gas Re-circulation, referred to as EGR), by returning part of the exhaust gas discharged from the engine to the intake manifold, and re-entering the cylinder together with the fresh mixture, thereby increasing the specific heat capacity of the mixture stripping in the combustion chamber, Lowering the maximum combustion temperature and reducing the amount of NOx generated in the exhaust gas can also improve part-load fuel consumption, and further expand the area where Lambda=1 (and air-fuel ratio=1) near the external characteristics, which is especially suitable for solving China VI The challenge of the RDE emission regulation cycle has been applied in more and more vehicles. [0003] The design of the intake and exhaust systems of the engine has a s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D21/08F02M26/13F02M26/39F02D41/00
CPCF02M26/13F02M26/39F02D41/005F02D41/0065F02D21/08F02D2021/083
Inventor 陈欢武涛郭凯
Owner SAIC MOTOR
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