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Exhaust gas recirculation system for automobile engine

A recirculation system, automotive engine technology, applied in exhaust gas recirculation, engine components, combustion engines, etc., can solve problems such as the EGR system that has not been solved, and achieve the effect of reducing energy consumption, accurate control, and reducing ventilation loss

Active Publication Date: 2015-08-05
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the solution of this patent can control the supply of recirculated exhaust gas according to the driving conditions of the vehicle, so that the fuel combustion conditions are improved to a certain extent, and at the same time overcome the drawbacks of the complex structure of the EGR system outside the cylinder block, the exhaust gas recirculation system of the vehicle The recirculated exhaust gas is introduced from the intake manifold passage, which does not solve the problem that the exhaust gas collection of the EGR system is affected by factors such as exhaust back pressure and boost pressure.

Method used

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  • Exhaust gas recirculation system for automobile engine
  • Exhaust gas recirculation system for automobile engine
  • Exhaust gas recirculation system for automobile engine

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Embodiment Construction

[0020] See Figure 1, figure 2 , the present invention comprises an engine cylinder 12, an auxiliary cylinder 5, an auxiliary cylinder piston 6 and an electromagnetic control valve 3, the auxiliary cylinder piston 6 is placed inside the auxiliary cylinder 5, and the auxiliary cylinder 5 and the engine cylinder 12 are provided with interconnected Passage 13, an electromagnetic control valve 3 is set on the passage 13, and the electromagnetic control valve 3 is a two-position two-way valve, which is controlled by the engine ECU; a compression spring 7 is set between the auxiliary cylinder piston 6 and the bottom surface of the auxiliary cylinder 5 A sliding guide rod 10 is installed at the center position of the bottom surface of the auxiliary cylinder piston 6, the sliding guide rod 10 is fitted with a screw sleeve assembly 8 installed on the bottom surface of the auxiliary cylinder, and the screw sleeve assembly 8 is driven by a servo motor 9, The upper end of the screw sleeve...

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Abstract

The invention relates to an EGR (Exhaust Gas Recirculation) system of an automobile engine, which is used for solving problems that pipeline structures of EGR systems of conventional engines are complicated and exhaust quantities are difficult to accurately control. The EGR system comprises an engine cylinder, an auxiliary cylinder, an auxiliary cylinder piston and an electromagnetic control valve, wherein the auxiliary cylinder piston is arranged inside the auxiliary cylinder, a passageway which is used for communicating the auxiliary cylinder and the engine cylinder is arranged between the auxiliary cylinder and the engine cylinder, and the electromagnetic control valve is arranged on the passageway. With the adoption of the EGR system, the EGR air inflow can be accurately controlled, the matching range of the EGR and an engine operating condition is enlarged, and the dynamic property, the economy and the emission performance of the engine are obviously improved.

Description

technical field [0001] The invention relates to an automobile engine, in particular to an exhaust gas recirculation system of the automobile engine, and belongs to the technical field of combustion engines. Background technique [0002] Engine exhaust gas recirculation technology (EGR) is to introduce a certain amount of exhaust gas into the cylinder combustion chamber and mix it with air to participate in combustion again. Since the exhaust gas contains H2O vapor, N2 and CO2, etc., the heat capacity of the mixed gas entering the combustion chamber is increased, thereby reducing the maximum combustion temperature, destroying the high-temperature generation conditions of NOx, reducing the concentration of NOx in the exhaust gas, and improving Engine emission performance. [0003] Existing EGR systems can be roughly divided into two categories, namely EGR systems outside the cylinder and EGR systems inside the cylinder. Among them, the EGR system outside the cylinder general...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M25/07F02M26/37
CPCY02T10/121Y02T10/12
Inventor 王宇马志刚马兴兴张国文张世昌
Owner GREAT WALL MOTOR CO LTD
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