A kind of egr cooling system with controllable water end
A technology of EGR cooler and cooling system, applied in the direction of charging system, machine/engine, mechanical equipment, etc., can solve the problems of reducing cooling efficiency, failing to reduce exhaust gas temperature, affecting the flow distribution of engine cooling system, etc., to achieve improved The effect of cooling efficiency
Active Publication Date: 2019-03-22
CHONGQING CHANGAN AUTOMOBILE CO LTD
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Problems solved by technology
[0003] In the exhaust gas recirculation system of the engine, the coolant flowing through the EGR cooler is to cool down the exhaust gas entering the EGR cooler. When the EGR valve is opened in the traditional EGR cooler, the coolant flows through the EGR cooler, which can To reduce the exhaust gas temperature, when the EGR valve is closed, no exhaust gas flows into the EGR cooler, but the coolant still flows through the EGR cooler branch, that is, the coolant cannot reduce the exhaust gas temperature, but affects The flow distribution of the entire engine cooling system is reduced, reducing the cooling efficiency
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[0017] Below in conjunction with accompanying drawing, structure and working method of the present invention are described in further detail:
[0018] see figure 1 , EGR water end control pipeline includes: water pump 1, cylinder body water jacket 2, cylinder gasket hole 3, cylinder head water jacket 4, radiator 5, oil cooler 6, HVAC 7, thermostat 8, EGR cooler 9 , EGR valve 10 , EGR gas side inlet 15 , EGR gas side communication pipe 16 , EGR gas side outlet 17 .
[0019] The above EGR water end control pipeline has two branches at the outlet of the water pump 1, the first one flows to the water jacket 2 of the cylinder body, and flows to the water jacket 4 of the cylinder head through the cylinder gasket hole 3, and flows out from the cylinder head. The second line flows through the EGR valve 10 to the EGR cooler 9 . The two branches converge at the outlet of the cylinder head, and then flow back to the front of the water pump 1 through three branches of the radiator 5, t...
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The invention relates to a water end-controllable EGR cooling system. The water end-controllable EGR cooling system comprises two parts of an EGR water end control pipeline and an EGR gas end control pipeline. The EGR gas end control pipeline includes an engine machine body, an intake manifold, an exhaust manifold, an EGR cooler, and an EGR valve. The EGR water end control pipeline includes a water pump, an engine water jacket, a radiator, a machine oil cooler, a heater, an EGR cooler, and an EGR valve. A control valve is arranged on a water channel for flowing through the EGR valve and the EGR cooler, and is linked with a valve of a control gas channel in the EGR valve through an electric control or mechanical control mode for synchronous opening and closing. As the control valve at a water end is additionally provided, in an opening state of the EGR valve, a gas end and the water end are synchronously opened to meet the waste gas cooling demands; in a closing state of the EGR valve, the gas end and the water end are synchronously closed; and EGR cooling liquid is distributed to a cooling branch of the engine machine body, so that the cooling efficiency is improved.
Description
technical field [0001] The invention belongs to the technical field of engines, in particular to an exhaust gas recirculation system of the engine. Background technique [0002] The gas end of the traditional engine EGR (exhaust gas recirculation) system is controlled by the EGR valve. When the EGR valve is opened, the exhaust gas from the exhaust pipe flows into the intake pipe through the EGR cooler and the EGR valve, and enters the combustion chamber to participate in combustion. The EGR cooler belongs to a branch of the engine cooling system. In the traditional cooling system, the EGR cooler branch has no control valve, that is, the branch is normally open, such as image 3 shown. [0003] In the exhaust gas recirculation system of the engine, the coolant flowing through the EGR cooler is to cool down the exhaust gas entering the EGR cooler. When the EGR valve is opened in the traditional EGR cooler, the coolant flows through the EGR cooler, which can To reduce the exha...
Claims
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IPC IPC(8): F02M26/23
Inventor 王杨余远菊卿辉斌
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD