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Valve used for diesel engine exhaust gas recirculation system

A technology of recirculation system and diesel engine, which is applied in the direction of exhaust gas recirculation, engine components, combustion engine, etc., can solve the problems such as complex valve structure, and achieve the effect of simple structure and wide product power coverage

Active Publication Date: 2015-06-03
NANYUE FUEL INJECTION SYST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an exhaust gas recirculation system (EGR) for the complex structure of the valve in the existing exhaust gas recirculation system (EGR), which can make the ratio adjustment relationship of air / recirculation exhaust gas change. more reliable and simple valve

Method used

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  • Valve used for diesel engine exhaust gas recirculation system
  • Valve used for diesel engine exhaust gas recirculation system
  • Valve used for diesel engine exhaust gas recirculation system

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Embodiment Construction

[0016] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the implementation of the present invention will be further described below in conjunction with specific illustrations.

[0017] see Figure 1 to Figure 4 , a valve used in a diesel engine exhaust gas recirculation system shown in the figure includes a valve seat 100 , a valve body 200 , a torque motor 300 , an eccentric cam plate 400 , a valve stem 500 , and a valve block 600 .

[0018] The torque motor 300 is installed on the first side 110 of the valve seat 100 by fasteners, and its output shaft extends to the second side 120 of the valve seat 100 opposite to the first side 110, and the eccentric cam plate 400 is installed on the output shaft of the torque motor 300 superior. A torsion spring 700 is sleeved on the output shaft of the torque motor 300 , one end of the torsion spring 700 is connected with the output shaft of the torque motor...

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Abstract

The invention discloses a valve used for a diesel engine exhaust gas recirculation system, which comprises a valve seat, and a valve body and a torque motor that are arranged on the valve seat; the valve body is provided with an exhaust gas inlet and an exhaust gas outlet; the valve body is internally provided with a valve cavity; the torque motor is fixed on the valve seat; the valve also comprises an eccentric cam plate, a valve rod and a torsion spring; the eccentric cam plate and the valve rod are arranged on an output shaft of the torque motor; the axis of the valve rod is vertical to the rotation axis of the eccentric cam plate; the upper rod part of the valve rod extends into the valve cavity, and a valve block is arranged at the end part of the upper rod part; the valve cavity is divided into an upper valve cavity and a lower valve cavity by the valve block, wherein the exhaust gas inlet is respectively communicated with the exhaust gas outlet by the upper valve cavity and the lower valve cavity; the lower rod part of the valve rod extends to the eccentric cam plate and is connected with the eccentric cam plate; and the valve rod is driven to do straight line motion by the rotating movement of the eccentric cam plate. The valve is simple in structure and can adjust the ratio between air and recycled exhaust gas only by one motor.

Description

technical field [0001] The invention relates to the technical field of diesel engine exhaust gas treatment, in particular to a valve used in an exhaust gas recirculation system (EGR) of a diesel engine. Background technique [0002] In order to reduce the content of harmful exhaust gases, especially nitrogen oxides (NOx), so-called EGR systems have been used in many types of internal combustion engines for many years. The input air is mixed and then sent to the combustion chamber of the engine, and a part of the input air is replaced by the recirculated exhaust gas, thus reducing the formation of NOx. Existing valves used in the EGR system generally include separate dampers arranged in the EGR recirculation cavity and the intake cavity, and separate drive motors are provided for these dampers, thereby making the valve device complicated and the control device also complicated. It's complicated. Contents of the invention [0003] The technical problem to be solved by the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M25/07F16K31/04F02M26/35F02M26/54F02M26/65
CPCY02T10/12
Inventor 龙美彪黄民备罗山刚李少鹤邓秋明
Owner NANYUE FUEL INJECTION SYST CO LTD
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