Controllable electronic control low-pressure oil supply device
A fuel supply device, low-pressure technology, applied in the direction of fuel injection devices, charging systems, engine components, etc., can solve the problems of low fuel static pressure, cavitation, associated cavitation, etc., to achieve consistency and reduce Cavitation, the effect of reducing pressure fluctuations
Inactive Publication Date: 2009-09-30
HARBIN ENG UNIV
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Often cause the fuel to pass through the sealing surface of the valve stem faster when it is sucked into the plunger cavity. In this case, because the static pressure of the fuel is relatively low, when the saturated vapor pressure of the fuel is reached, the air in the dissolved fuel will quickly overflow , and the fuel may also be vaporized, which will cause cavitation in the high-pressure fuel circuit during fuel injection, which will affect the power output of the engine and the life of the high-pressure fuel pipe and injection device
The cavitation phenomenon will produce many adverse consequences, such as damage to the flow performance, seriously affecting the injection regularity of the product and the consistency of the cycle injection volume, associated cavitation, mechanical damage and chemical corrosion, damage to parts, and Will produce strong vibration noise
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0012] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0013] combine figure 1 and figure 2 , Assembled in the pump box 2 of the electronically controlled injection unit pump or electronically controlled combined pump body 3, usually with a low-pressure fuel oil inlet 4 and an oil return port 10, a low-pressure pressure sensor 7, and an oil return solenoid valve 9. The fuel delivery pump 1 plays the role of pumping oil from the fuel tank. The fuel enters the pump box 2 through the oil inlet 4, part of which enters the high pressure system through the pump chamber 5, and most of it returns to the fuel tank through the oil return port 10. Oil delivery pump 1, pump chamber 5, oil inlet circuit 6, oil return circuit 8, and oil return solenoid valve 9 form a low-pressure oil circuit system. Normally, the flow characteristics of the oil delivery pump 1 are fixed, so the pressure of the low-pressure system is mainly deter...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a controllable electronic control low-pressure oil supply device, which comprises a pump box 2, a pump body 3, an oil transfer pump 1 and a low-pressure oil passage. An oil inlet passage 6 is connected with an oil inlet opening 4, and an oil return passage 8 is connected with an oil return opening 10. The oil supply device is characterized in that the oil return passage 8 is provided with a low pressure sensor 7, the oil return opening 10 is provided with an oil return electromagnetic valve 9, the low pressure sensor 7 and the oil return electromagnetic valve 9 are connected with an electronic control unit, the low pressure sensor 7 transmits signals to the electronic control unit, and the electronic control unit looks up a related map according to the working condition to acquire an optimal low pressure under the working condition so as to control the oil return electromagnetic valve 7 to adjust an oil return circulation area. In a low-pressure oil passage system which can ensure low pressure, ensures sufficient oil absorption and does not generate gas cavity in a whole working condition range, the controllable electronic control low-pressure oil supply device can control the pressure of a low-pressure oil passage in real time so as to meet the requirement of different engine types and working conditions on the low pressure.
Description
(1) Technical field [0001] The invention relates to a low-pressure fuel supply device of a diesel electronic control injection device. In particular, it relates to a low-pressure oil supply device used on an electronically controlled time-controlled diesel injection device for a diesel engine. (2) Background technology [0002] The time-controlled diesel injection device based on electronic control is a product integrating machine, hydraulic and electromagnetic. The fuel injection process is controlled through the control of the solenoid valve by the electronic control unit ECU. Its hydraulic part includes low-pressure oil supply system and high-pressure oil circuit system. The low-pressure oil supply system refers to components including the oil delivery pump, low-pressure pump box, and oil return valve. The pressure of the low-pressure fuel supply system of the time-based electronically controlled fuel injection device in the prior art is regulated by the spring stiffne...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): F02M51/04
Inventor 范立云马修真宋恩哲李文辉袁志国费红姿姚崇孙军杨立平
Owner HARBIN ENG UNIV