Dual exhaust electric EGR (Exhaust Gas Recirculation) valve

Abstract

The invention discloses a dual exhaust electric EGR (Exhaust Gas Recirculation) valve, which comprises a valve body, wherein an electric motor is arranged on the valve body; a gearbox is arranged below the electric motor; a center rod is arranged inside the valve body; one end of the center rod is connected with the gearbox through a slider and the other end of the center rod is connected with a valve core; an exhaust gas inlet is arranged on the valve body, matched with the valve core, and communicated with a cavity of the valve body; two exhaust gas outlets, namely a first exhaust gas outlet and a second exhaust gas outlet, are arranged on the valve body; and both the first exhaust gas outlet and the second exhaust gas outlet are communicated with the cavity of the valve body. As the two exhaust gas outlets are arranged on the valve body, same exhaust gas emission can be guaranteed due to the same shape of the gas outlets when exhaust gas passes through the uniform cavity in the valve body from the exhaust gas inlet of the valve body and is uniformly diverted to the exhaust gas outlets; and the exhaust gas inlet uniformity of four cylinders within a certain period can be guaranteed due to the centering distribution of the two gas outlets when the exhaust gas in the two exhaust gas outlets flows to various cylinders in a cylinder head. Compared with the fact that the exhaust gas flows to the cylinders from a gas outlet, uniform gas inlet and full combustion of the four cylinders are ensured and the overall performance of the valve body is improved.

Description

technical field [0001] The invention relates to an electric EGR valve in an automobile engine tail gas exhaust gas recirculation system, and belongs to the technical field of engine tail gas emission control devices. Background technique [0002] The electric EGR valve plays the role of adjusting and controlling the recirculation exhaust gas flow in the exhaust gas recirculation system of the automobile engine. Its main function is to energize the motor to promote the movement of the moving parts in the EGR valve, thereby changing the size of the exhaust gas inlet switch of the EGR valve to adjust the exhaust gas. purpose of traffic. The valve body in the valve is one of the parts, which is equipped with exhaust gas inlet, exhaust gas outlet, a uniform exhaust gas flow valve body cavity, an inlet flange for installation, and two exhaust flanges for installation . [0003] For the engine whose exhaust port of the EGR valve is directly connected to cylinder I, cylinder II, c...

AI Technical Summary

Problems solved by technology

[0003] For the engine whose exhaust port of the EGR valve is directly connected to cylinder I, cylinder II, cylinder III and cylinder IV of the cylinder head and not connected to the intake manifold, the valve body of the current batch of EGR valves is equipped with an exhaust gas inlet port and a Exhaust vents, such as figure 1 As shown, the single exhaust valve exhaust gas inlet 25 in the single exhaust valve 24 is connected to the exhaust gas exhaust main pipe 11, the single exhaust valve exhaust gas outlet 26 is connected to the exhaust gas inlet pipe 27, and the exhaust gas inlet pipe 27 It communicates with four cylinders again, thereby forming gas to communicate with cylinder I7, cylinder II 8, cylinder III 9, and cylinder IV10 through a nozzle, and cylinder I7, cylinder IV 10 are far away from exhaust gas intake pipe 27 relative to cylinder II 8 and cylinder III 9 , so that the air intake in the four cylinders is uneven within a certain period of time, which affects the performance of the car

Due to the large displacement of some engines, the current solution is to install two EGR valves to meet the flow rate and solve the phenomenon of uneven intake, which not only increases the cost, but also takes up a considerable amount of space in the engine

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