An egr valve and engine
An EGR valve and valve body technology, applied in engine components, machines/engines, mechanical equipment, etc., can solve the problems of power source rotor damage and engine performance deterioration, and achieve low intake resistance, high reliability, and control accuracy. high effect
Active Publication Date: 2020-11-20
WEICHAI POWER CO LTD
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- Abstract
- Description
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Problems solved by technology
At this time, the opening of the valve cap 3' and the exhaust gas recirculation condition are both uncontrollable, causing the engine performance to deteriorate; the push rod moves downward passively, and the driving force is transmitted to the power source 6', resulting in damage to the rotor of the power source
Method used
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[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.
[0038] Figure 4 It is a structural schematic diagram of the EGR valve provided by the present invention, such as Figure 4 It can be seen from the figure that the EGR valve mainly includes a valve body 1, a push rod 5, a valve cap 3 and a balance cap 9, wherein an intake passage 7 and an exhaust passage 8 which communicate with each other are formed in the valve body 1, and the intake passage 7 is used to The exhaust gas exhausted by engine combustion is introduced into the EGR valve, and the exhaust passage 8 c...
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The invention discloses an EGR valve and an engine, and relates to the technical field of engines. The EGR valve comprises a valve body, wherein a gas inlet channel and a gas outlet channel which communicate with each other are formed in the valve body; a push rod is arranged at one end of the valve body; a valve cap is arranged in the gas outlet channel; one end of the push rod penetrates throughthe gas inlet channel and is fixedly connected with the valve cap; the push rod can drive the valve cap to seal the position where the gas inlet channel is connected with the gas outlet channel; a first accommodating groove is formed in the gas inlet channel; a balancing cap is arranged in the first accommodating groove and is fixedly connected to the push rod; the peripheral side wall of the balancing cap is attached to the wall of the first accommodating groove and can slide along the wall of the first accommodating groove; and the magnitude of pressure generated by waste gas in the gas inlet channel on the valve cap is equal to the magnitude of pressure generated on the balancing cap, and the direction of the pressure generated by the waste gas in the gas inlet channel on the valve capis opposite to the direction of the pressure generated on the balancing cap. The invention further discloses the engine. The EGR valve and the engine are high in reliability, the valve cap is prevented from being opened passively, the gas inlet resistance is low, the gas inlet efficiency is high, and the control precision of the EGR valve is high.
Description
technical field [0001] The invention relates to the technical field of engines, in particular to an EGR valve and an engine. Background technique [0002] Exhaust gas recirculation (EGR) is a method of introducing a part of the exhaust gas to the inhaled fresh air (or mixed gas) during the working process of the engine, and returning it to the inside of the cylinder for recirculation to participate in combustion, which reduces the temperature of the combustion chamber and improves the engine. Efficiency Improve combustion environment, reduce engine load, reduce NO x compound emissions, reduce knocking, and prolong the service life of each component. The EGR valve is a product installed on the engine to guide the exhaust gas from the engine combustion to the intake manifold to participate in the combustion. When the engine is running under load, the EGR valve opens to allow a small amount of waste to enter the intake manifold. The combustible mixture enters the combustion c...
Claims
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IPC IPC(8): F02M26/66F02M26/68
CPCF02M26/66F02M26/68
Inventor 代子阳李俊琦王新校李德胜唐帅闫乐乐李超
Owner WEICHAI POWER CO LTD