Method for acquiring and monitoring pressure signal of oil rail
An oil rail pressure and signal technology, applied in electrical control, fuel injection devices, mechanical equipment, etc., can solve problems such as failure to reflect oil rail pressure changes in real time, fault misreporting and omission, and unstable engine performance. Software testing and calibration, monitoring comprehensive, easy-to-achieve results
Inactive Publication Date: 2009-12-09
CHERY AUTOMOBILE CO LTD
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Problems solved by technology
If the fuel rail pressure is not calculated accurately, it will lead to inaccurate fuel injection calculation, which will cause unstable engine performance, which will affect the power, economy and emissions of the engine and the vehicle, and will also make the power system components reliable. Performance and durability face a severe test
At present, in the existing technology, reasonable collection and monitoring of oil rail pressure are rarely carried out, and the monitoring strategies of a few systems with monitoring functions are relatively simple, which cannot achieve real-time, accurate and comprehensive monitoring, and unreasonable data collection still occurs , It is impossible to reflect the change of oil rail pressure in real time, and the defects of misreporting and omission of faults
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[0013] A method for collecting and monitoring oil rail pressure signals, including the following sequential steps: first step, collecting oil rail pressure signals, a rail pressure sensor collects the pressure of the oil rail in real time, and stores the pressure value, from the stored Take out the pressure peak value from the pressure value for monitoring; the second step is to monitor the collected pressure peak value in real time and judge whether the sensor is faulty; the third step is to confirm after the fault occurs, if the judgment result of the second step is If yes, then confirm and store the fault, otherwise, return to the second step. Such as figure 1 , 2 , 3, 4 shown.
[0014] combine figure 1 According to the role of the rail pressure signal in the power control system, there are two ways to collect the output signal of the rail pressure sensor, and filter out the interference signal through the filter processing circuit:
[0015] First, the fuel injection pr...
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The invention relates to a method for acquiring and monitoring a pressure signal of an oil rail. The method comprises the following steps in sequence of: (1) acquiring pressure of the oil rail by a rail pressure sensor in real time, storing pressure values and taking a pressure peak value out of the stored pressure values for monitoring; (2) monitoring the acquired pressure peak value in real time and judging whether the sensor has fault; (3) if a judging result of the step two is that the sensor has fault, confirming and storing the fault; and otherwise, returning to the step two. The method meets the controlling requirement of a power controlling system through the real-time collection of the pressure signal of the oil rail, fully and accurately monitors the fault possibly occurring through the real-time monitoring of the pressure signal of the oil rail and completes the fault confirmation and fault processing after monitoring the fault. The method has comprehensive acquisition and monitoring, easy realization and convenient software testing and calibration.
Description
technical field [0001] The invention relates to the field of automobile electronic control, in particular to a method for collecting and monitoring oil rail pressure signals. Background technique [0002] Under the current situation of energy shortage, high-pressure common rail diesel engines have been more and more used in the field of passenger vehicles due to their low fuel consumption and pollution. Rail pressure is becoming an increasingly important input parameter for powertrain control strategies. If the fuel rail pressure is not calculated accurately, it will lead to inaccurate fuel injection calculation, which will cause unstable engine performance, which will affect the power, economy and emissions of the engine and the vehicle, and will also make the power system components reliable. Performance and durability are facing a severe test. At present, in the existing technology, reasonable collection and monitoring of oil rail pressure are rarely carried out, and th...
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IPC IPC(8): F02D41/22F02D45/00F02M47/00
CPCY02T10/40
Inventor 聂家谊
Owner CHERY AUTOMOBILE CO LTD