a fuel injector
A fuel injector, oil technology, applied in the direction of fuel injection device, machine/engine, charging system, etc., can solve the problems of complex structure, high cost, complex control, etc., and achieve the effect of avoiding complex structure
Active Publication Date: 2019-06-21
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0006] One of the objectives of the present invention is to provide a fuel injector that solves the complex structure, high cost and complicated control caused by the high-pressure pump oil in the prior art.
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[0026] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
[0027] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a ...
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The invention relates to the field of fuel injection equipment and provides a fuel injector. The fuel injector comprises a fuel injector shell body, a linear motor, a piston and a nozzle. A containing cavity and a fuel liquid pressure storage cavity are formed in the fuel injector shell body. The linear motor is in the containing cavity. The fuel liquid pressure storage cavity is divided into a first pressure storage cavity body and a second pressure storage cavity body through a first one-way valve. One end of the piston stretches into the first pressure storage cavity body, and the other end of the piston is connected with the linear motor. When the fuel pressure in the first pressure storage cavity body reaches the opening pressure of the first one-way valve, fuel liquid enters the second pressure storage cavity body from the first pressure storage cavity body. The nozzle is installed on a shell body of the second pressure storage cavity body and used for fuel liquid injection. According to the fuel injector, the motor drives the piston to move so that high-pressure fuel liquid can be formed in the first pressure storage cavity body; in addition, fuel liquid stable in pressure intensity is obtained by forming the second pressure storage cavity body, and high-pressure atomizing fuel liquid is injected from the nozzle finally; and obviously, the high-pressure fuel liquid can be obtained without arranging a high-pressure pump for fuel pumping, so that the problems that the high-pressure pump is complex in structure, high in cost and complex in control are solved.
Description
technical field [0001] The invention relates to the field of fuel injection equipment, in particular to a fuel injector. Background technique [0002] Taking two-stroke engines as an example, traditional two-stroke engines use flammable mixture to scavenge, which will cause short-circuit loss of fuel, thereby increasing fuel consumption, and causing excessive residual exhaust gas in the mixture under low load. Therefore, traditional two-stroke engines generally have the disadvantages of high fuel consumption and poor emissions. [0003] On this basis, the prior art proposes the use of an electronically controlled in-cylinder direct-injection injector, so that stratified combustion in the cylinder can be realized in the engine. This type of in-cylinder direct injection fuel injector can collect various signals such as throttle opening, engine speed, intake air temperature, intake air pressure, cooling water temperature, engine load, etc. through sensors and other devices, an...
Claims
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IPC IPC(8): F02M47/02F02M61/18F02M63/00
CPCF02M47/027F02M61/1886F02M63/004
Inventor 高宏力张付军王政凯
Owner BEIJING INSTITUTE OF TECHNOLOGYGY