Two-way movement fuel metering valve
A fuel metering valve, two-way movement technology, applied in valve details, valve devices, multi-way valves, etc., can solve the problems of slow return of fuel metering valve and increased rail pressure overshoot, and achieve simple structure and fast return. The effect of accurate position and fuel injection quantity
Inactive Publication Date: 2019-05-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0004] What the present invention aims to solve is the technical problem that the fuel metering valve in the prior art returns slowly, which in turn leads to an increase in the overshoot of the rail pressure
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[0031] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, and Not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0032] In the description of the present invention, unless otherwise specified, the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of It is convenient to describe the present invention and simplify the description, but does not indicate or imply ...
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The invention relates to the field of fuel injection equipment, and provides a bi-directional motion fuel metering valve. The metering valve comprises a valve body, a solenoid valve housing, a throttle valve housing, and a solenoid valve core, a coil block and a slide valve core which are arranged in the throttle valve housing; one end of the solenoid valve housing is provided with an electrical plug, and the other end of the solenoid valve housing is connected to the top of the throttle valve housing; the bottom of the throttle valve housing is connected to the valve body; the valve body is internally provided with a channel which axially penetrates the valve body, and the inner wall of the channel is provided with an annular oil groove; the outer wall of the channel is provided with an oil inlet which communicates with the annular oil groove; the coil block is slidably matched and connected with the outer wall of the solenoid valve core, and the bottom of the coil block is connectedto the top of the slide valve core; the bottom of the slide valve core is inserted into the channel, and the bottom of the slide valve core is provided with a cavity in the axial direction of the slide valve core; and the outer wall of the slide valve core is provided with a first oil outlet which communicates with the cavity. According to the bi-directional motion fuel metering valve provided bythe invention, the quick return of the slide valve core can be achieved, and overshoot caused by return delay of the slide valve core is reduced obviously, so that the fuel injection quantity is moreaccurate.
Description
technical field [0001] The invention relates to the field of fuel injection equipment, in particular to a two-way motion fuel metering valve. Background technique [0002] In the high-pressure common rail system, the fuel metering valve is usually installed on the oil pump of the high-pressure common rail system, and the fuel injection quantity can be precisely controlled through the rail pressure and the fuel injection pulse width, thereby greatly improving the performance and emission of the diesel engine . [0003] However, the existing fuel metering valve is a one-way movement, and the return process only depends on the return spring, which is slow, and then increases the overshoot of the rail pressure, resulting in an error in the fuel injection quantity. Contents of the invention [0004] The invention aims to solve the technical problem that the fuel metering valve returns slowly in the prior art, which further leads to an increase in the overshoot of the rail pres...
Claims
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IPC IPC(8): F16K11/065F16K31/06
CPCF16K11/0655F16K31/0603
Inventor 左哲姚建伟谢军鲁怡赵振峰张付军
Owner BEIJING INSTITUTE OF TECHNOLOGYGY