Hydraulic throttle valve of high-pressure common rail oil injector

Abstract

The invention discloses a hydraulic throttle valve of a high-pressure common rail oil injector. The hydraulic throttle valve comprises an end face throttle channel, a side face throttle channel, an end face first inclined channel, a valve shoulder side face channel, an end face second inclined channel, a valve element guide hole, a valve element upper end face and a valve element oil storage cavity. The end face throttle channel, the valve element guide hole and the valve element oil storage cavity are coaxially arranged. The valve element oil storage cavity is formed between the valve elementguide hole and the end face throttle channel. The side face throttle channel communicates with the valve element oil storage cavity. The end face first inclined channel communicates with the valve shoulder side face channel. The valve shoulder side face channel communicates with a low-pressure oil way. The end face throttle channel communicates with a comprehensive containing cavity of a controlvalve seat. The end face first inclined channel communicates with an end face groove of a control valve element. The end face first inclined channel, an actuator and a control valve are matched to form a unique control oil way, and the opening and closing of an oil nozzle matching part can be rapidly achieved. An oil nozzle is directly controlled through the throttle valve, the response speed is increased, and the duration can be shortened. The hydraulic throttle valve is a core part of the rapid response type high-pressure common rail oil injector.

Description

Technical field: [0001] The invention relates to a fast-response diesel engine common rail fuel injector, in particular to a hydraulic throttle valve therein. Background technique: [0002] During the working process of the common rail injector assembly of the diesel engine, it needs to experience a certain delay time from the injector receiving the injection start pulse signal to the injector realizing the injection. This delay time is called the opening delay time; and From the injector receiving the injection closing pulse signal to the injection closing, a certain delay time also needs to end. This delay time is called the closing delay time; the shorter the opening delay and closing delay time, the better the response of the injector. Faster, and the faster the injector responds, the more conducive to the working stability of the injector, which is conducive to increasing the engine speed that the injector assembly is adapted to, and is also conducive to improving the p...

AI Technical Summary

Problems solved by technology

[0003] In order to reduce the duration, it is necessary to reduce the opening or closing delay of the injector assembly during the injection process. The existing diesel injectors cannot simultaneously control the opening and closing delay of the injector. That is to say, the current control valve Solution, in order to reduce the duration, if the parameters of the flow difference between the inlet and outlet holes are matched, there will be a hyperbolic effect on the opening delay and closing delay, and the final actual effect is very limited

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