Zero drift self-adaption method for pressure sensor of engine

Abstract

The invention provides a zero drift self-adaption method for a pressure sensor of an engine. By means of the method, the zero drift problem of the pressure sensor can be effectively solved, and the control reliability is improved. The method comprises steps as follows: whether the rotating speed of the engine is zero is detected; if yes, a detecting value of zero-point voltage of the pressure sensor is acquired; a difference value between the detecting value of the zero-point voltage of the pressure sensor and the theoretical value is acquired; the voltage value detected by the pressure sensor during operation of the engine is corrected by means of the difference value. Self-adaption of zero drift can be realized, influences of zero drift on electrical control of the engine are eliminated, the engine is accurately controlled, and the performance of the engine is optimized. The influences of zero drift on the detecting result can be effectively reduced by means of a simple control program, so that the service life of the pressure sensor is prolonged. Compared with a mode of circuit hardware modification, the method has the advantages that the cost for hardware purchase and time required for circuit modification are saved, and the method is more economical and efficient.

Description

technical field [0001] The invention relates to the technical field of electronically controlled engines, in particular to a zero drift adaptive method of an engine pressure sensor. Background technique [0002] The pressure sensor is the most commonly used sensor in industrial practice, and it is widely used in various industrial self-control environments, including ordinary pressure sensors and differential pressure sensors capable of detecting differential pressure. [0003] At present, in the field of electronically controlled engine technology, the pressure sensor has become an indispensable component. However, in practice, there are many factors that cause the zero point drift of the pressure sensor. The so-called drift of the sensor refers to the change of the output of the sensor over time when the input quantity remains unchanged; correspondingly, the so-called zero drift of the sensor refers to the change of the zero point of the sensor over time without any input ...

AI Technical Summary

Problems solved by technology

However, the above method needs to change the circuit hardware, which is not only inconvenient to operate, but also increases the hardware cost

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