A method and system for determining a change in clearance between a camshaft and a sensor
A camshaft and sensor technology, applied in the automotive field, can solve the problem of not being able to measure the tooth tip gap between the sensor and the signal wheel, and achieve the effect of improving accuracy
Active Publication Date: 2021-07-02
GUIZHOU GEELY ENGINE CO LTD +1
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[0005] In order to solve the above technical problems, the present invention discloses a method and system for determining the change of the gap between the camshaft and the sensor. The present invention determines the change of the gap between the sensor and the tooth top of the signal wheel according to the change of the resistance value of the sensor. , the change of the gap is reflected in the size of the resistance value obtained by the sensor, which solves the technical problem that the gap between the sensor and the tooth top of the signal wheel cannot be measured after the sensor is installed, and then improves the accuracy of sensor detection sex
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[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0059] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrate...
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The invention discloses a method and system for determining the gap between a camshaft and a sensor. The engine includes a cylinder, a cylinder head and a camshaft. The cylinder and the cylinder head form a cavity, and the camshaft is arranged in the cavity. The method includes the following steps: The sensor obtains multiple resistance values generated by one rotation of the camshaft; obtains multiple current values generated by one rotation of the camshaft; calculates the voltage value corresponding to each rotation angle; generates a first waveform signal; The gap between the shaft and the sensor; calculate the proportional coefficient; adjust the first waveform signal according to the proportional coefficient and the rotation angle of the camshaft to obtain the second waveform signal; determine the change information of the gap according to the second waveform signal; the present invention is based on the sensor The change of the resistance value determines the change of the gap between the sensor and the tooth top of the signal wheel, and the change of the gap is reflected in the resistance value obtained by the sensor, thereby improving the detection accuracy of the sensor.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to a method and system for determining the variation of the gap between a camshaft and a sensor. Background technique [0002] With the continuous development of automobile technology, traditional automobile ignition systems have been gradually replaced by electronically controlled ignition systems. The electronic control system can accurately measure the compression top dead center of the first cylinder through the signal output by the camshaft phase sensor equipped on the vehicle, so as to perform sequential fuel injection control, ignition timing control and deflagration control to ensure ignition timing. The signal board is the signal rotor of the sensor, which is used to ensure that the camshaft phase sensor senses the periodic change of magnetic flux, and realizes the transmission of the camshaft position signal. The camshaft phase sensor can determine the fuel injection p...
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IPC IPC(8): G01B7/15
CPCG01B7/15
Inventor 何燕君宋振波
Owner GUIZHOU GEELY ENGINE CO LTD