Online Fault Diagnosis and Treatment Method of Diesel Engine Throttle Position Sensor
A technology of accelerator position and fault diagnosis, which is applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve problems such as incorrect accelerator position signals, non-compliant acceleration and deceleration behaviors of vehicles, and dangers, so as to avoid abnormal acceleration behaviors and improve Effect of improving reliability and safety
Active Publication Date: 2016-09-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
If the accelerator position sensor fails, the accelerator position signal obtained by the controller is incorrect, which will cause the vehicle to not meet the driver's expected acceleration and deceleration behavior, which will lead to dangerous situations
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[0025] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.
[0026] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.
[0027] Firstly, the principle of the on-line fault diagnosis processing method for the diesel engine throttle position sensor provided in this embodiment is mainly to collect the throttle position signal through the controller according to the four-way throttle position sensor (referred to as the sensor), and to output the four-way throttle position sensor. The voltage signal is detected by hardware to preliminarily judge t...
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The invention discloses an on-line fault diagnosis and processing method of a diesel engine throttle position sensor, comprising the following steps: Step 1, a controller collects signals of the throttle position at two different times through four redundant throttle position sensors and performs hardware detection; Step 2, the controller normalizes the signals detected by the hardware of the at least two accelerator position sensors in step 1, and normalizes the difference between the voltage signals output by the at least two accelerator position sensors at two different times. Compare the absolute value of the throttle position sensor with the calibration value; step 3, according to the comparison result in step 2, perform fault diagnosis on the accelerator position sensor in two cases; step 4, select one of the faultless accelerator position sensors according to the fault diagnosis result in step 3 The collected signal is used as the output value of the accelerator pedal. The method ensures the reliable input of the accelerator signal, and ensures that the vehicle runs reliably according to the driver's expectation.
Description
technical field [0001] The invention relates to the field of diesel engine electronic control systems, in particular to an online fault diagnosis and processing method for a diesel engine throttle position sensor. Background technique [0002] Due to the rapid development of computer technology and sensor detection technology, diesel engine fuel injection technology is developing from traditional purely mechanical fuel injection to electronically controlled fuel injection technology, and more and more diesel engines are equipped with electronic control systems. The accelerator position sensor in this system plays a decisive role in the normal operation of the diesel engine. [0003] The ECU of the electronically controlled diesel engine calculates the fuel injection quantity based on signals such as the throttle position sensor, speed and intake air volume. The function of the throttle position sensor is to feed back the driver's intention to the electronic control system co...
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IPC IPC(8): F02D41/22F02B77/08
CPCY02T10/40
Inventor 王英敏张付军崔涛
Owner BEIJING INSTITUTE OF TECHNOLOGYGY