Three-way valve for D-EGR system and vehicle
A three-way valve and vehicle technology, applied in the field of vehicles, can solve problems such as poor engine emissions, achieve the effects of reducing emissions, reducing nitrogen oxide content, and improving environmental protection performance
Inactive Publication Date: 2018-01-05
GREAT WALL MOTOR CO LTD
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Problems solved by technology
[0004] In view of this, the present invention aims to propose a three-way valve for D-EGR system to solve the problem of poor emission when the engine is cold started
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[0030] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0031] The three-way valve 100 of the embodiment of the present invention will be described in detail below with reference to the accompanying drawings and embodiments. The three-way valve 100 can be applied to the D-EGR system of a vehicle, for example, as figure 1 As shown, the vehicle includes an engine 200 , an intake system 300 and an exhaust system 400 , and a three-way valve 100 is connected between the engine 200 , the intake system 300 and the exhaust system 400 so as to control the gas flow.
[0032] Such as figure 2 and image 3 As shown, the three-way valve 100 for the D-EGR system according to the embodiment of the present invention may include: a valve body 10, a switching device 20 and a driving device 30, the valve body 10 has an air inlet a, a first exhaust hole b and the second vent c, s...
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The present invention provides a three-way valve for a D-EGR system and a vehicle. The three-way valve comprises a valve body, a switching device and a driving device; the valve body is provided witha gas inflow hole, a first gas exhausting hole and a second gas exhausting hole; the gas inflow hole is communicated with a gas exhausting port of any cylinder in an engine; the first gas exhausting hole is communicated with a gas inflow system; the second gas exhausting hole is communicated with a gas exhausting system; the switching device is arranged in the valve body; and the driving device isarranged to drive the switching device to move in the axial direction so as to connect the gas inflow hole with the first gas exhausting hole or connect the gas inflow hole with the second gas exhausting hole. In this way, during cold starting of an engine, the gas inflow hole and the second gas exhausting hole can be connected by the switching device, and therefore waste gas in a plurality of cylinders in the engine can all flow into a catalytic device, the catalytic device can fast reach the work temperature, the emission of harmful gas can be reduced, and the environment protecting performance of the vehicle can be improved.
Description
technical field [0001] The invention relates to the technical field of vehicles, in particular to a three-way valve for a D-EGR system and a vehicle with the three-way valve. Background technique [0002] The research and development idea of D-EGR (Dedicated Exhaust Gas Recirculation-specialized exhaust gas recirculation) comes from the Southwest Research Institute of the United States. It is envisaged that only a single cylinder is used to participate in the exhaust gas recirculation process, so as to reduce the redundant consumption in the exhaust gas recirculation process energy. During the operation of the engine, the exhaust gas in only one cylinder enters the EGR pipeline and participates in the exhaust cycle after passing through the combustion chamber, which means that this system will provide a constant 25% exhaust gas recirculation rate (referred to as the EGR rate ). Because it can maintain a relatively high and stable EGR rate, the engine can work stably at a...
Claims
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IPC IPC(8): F02M26/71
Inventor 崔亚彬宋东先孙剑
Owner GREAT WALL MOTOR CO LTD