An interventional diagnosis method and system for fuel injection quantity deviation of diesel engine
A technology of fuel injection and diagnostic methods, which is applied in the direction of fuel injection devices, charging systems, mechanical equipment, etc., and can solve problems such as the inability to monitor fuel injection attenuation or clogging as a whole, the inability to decouple the deviation of fuel injection volume, and the inability to effectively eliminate interference, etc.
Active Publication Date: 2022-02-18
DONGFENG COMML VEHICLE CO LTD
View PDF5 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] Among the above methods, the first one is to monitor the long-term impact of fuel injector failure on the emission control system. This method is a simulation of a clogged fuel injector, and this solution can only monitor the final fuel injector when it is completely blocked. data; the second is to use special stable working conditions to look at the speed fluctuations. This method has its own fixed defects. The fuel injection quantity deviation caused by the abnormal fuel injection of the injector; the non-governing range cannot effectively eliminate the interference caused by the action of the intake throttle valve, EGR or the switching of combustion control related parameters.
At the same time, it is also impossible to monitor and identify the simultaneous attenuation or blockage of the fuel injection of each cylinder
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
[0046] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0047] The embodiment of the present invention provides an interventional diagnosis method and system for diesel fuel injection quantity deviation, which can effectively evaluate the fuel injection quantity of a fuel injector or multiple fuel injections through the pressure drop deviation caused by each injection The fuel injection quantity of the injector is out of tolerance.
[0048] In order to achieve the above-mentioned technical effects, the general idea of the application is as follows:
[0049] When the selected parameters of the engine in the anti-drag mode are within the preset threshold range, injecting a preset amount of oil into the cylinders in sequence within the working cycle of each cylinder of the engine;
[0050] Obtain the rail pressure drop of each cylinder, compare it with the preset rail pressure drop value, and compar...
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 discloses an interventional diagnosis method and system for diesel fuel injection amount deviation, which relates to the field of engines. During the working cycle, a preset amount of oil is injected into the cylinder. Obtain the rail pressure drop of each cylinder, compare it with the preset rail pressure drop value, and compare the rail pressure drop of each cylinder with each other to confirm whether the fuel injection amount of each cylinder of the engine is abnormal. The invention can quickly and effectively judge whether the fuel injection quantity of each cylinder in the diesel engine is abnormal.
Description
technical field [0001] The invention relates to the field of engines, in particular to an interventional diagnosis method and system for fuel injection amount deviation of a diesel engine. Background technique [0002] The fuel injector in the traditional generator does not have a flow sensor. Therefore, when the fuel injector needs to be checked, the fuel injection quantity cannot be directly diagnosed. [0003] The current mainstream methods are as follows. The first solution is an alternative solution, which is tested by monitoring the long-term impact of injector failure on the emission control system. The second is to use a special stable working condition to look at the fluctuation of the speed, and detect the abnormality of the fuel injection quantity of a certain cylinder through the regular speed fluctuation. The third is to calculate the fuel injection volume by establishing the corresponding relationship model between the rail pressure drop and the fuel injection...
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 Patent Type & Authority Patents(China)
IPC IPC(8): F02M65/00
CPCF02M65/001F02M65/003
Inventor 刘乔华张衡陈玉俊周杰敏蒋学锋朱丹丹张恒平袁集平董定欢张亚晓
Owner DONGFENG COMML VEHICLE CO LTD