Device for measuring position of engine crankshaft

Abstract

The invention discloses a device for measuring the position of an engine crankshaft, and belongs to the technical field of engines. The device is characterized by at least comprising a same-side photoelectric sensor for detecting the position of the engine crankshaft, an electromagnetic sensor for detecting the position of the engine crankshaft, an and gate for receiving output signals of the same-side photoelectric sensor and the electromagnetic sensor and conducting logic and operation, and a plug in data interaction with a peripheral receiving terminal, an output terminal of the and gate circuit is connected with the plug sequentially through an anti-jamming circuit and a lead. The same-side photoelectric sensor is added on the basis of the electromagnetic sensor, and under the common effect of the and gate circuit and the anti-jamming circuit, it is ensured that the position of the engine crankshaft is precisely measured. The engine crankshaft position sensor device can be installed on an engine, and output signals are provided for an engine control unit (ECU).

Description

technical field [0001] The invention belongs to the technical field of engines, in particular to a device for measuring the crankshaft position of an engine. Background technique [0002] The engine crankshaft signal is the most important speed signal of the electronically controlled engine. It plays an important role in the starting performance, reliability and safety performance of the engine. At the same time, in order to meet the reliable operation of the engine, the safety measures of the engine crankshaft position sensor of the whole vehicle must be reliable. in place. The current pure magnetoelectric sensor as the crankshaft position sensor is affected by the processing accuracy of the crankshaft signal plate, the influence of the installation clearance, the influence of the surface adsorption impurities, and the low output signal of the engine at low speed. Change the magnetic circuit to change the magnetic flux, so that the coil generates an induced voltage. If the...

AI Technical Summary

Problems solved by technology

The current pure magnetoelectric sensor as the crankshaft position sensor is affected by the processing accuracy of the crankshaft signal plate, the influence of the installation clearance, the influence of the surface adsorption impurities, and the low output signal of the engine at low speed. Change the magnetic circuit to change the magnetic flux, so that the coil generates an induced voltage. If the rotating speed is very slow, the rotating body changes the magnetic circuit slowly, and the change of the magnetic flux is also very slow. The induced voltage will be very small, and it will not be correct. Determination of rotational speed), so at low rotational speed, it has the disadvantages of poor signal output stability, low reliability, slow response, etc.

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