Crank angle sensor

Details Crank angle sensor Crank angle sensor

1986-02-04

1987-09-22

Myracle, Jerry W.

Measuring and testing

Test stand

For engine

324208, G01M 1500

Patent

active

046946888

ABSTRACT:
A crank angle sensor comprises a magnetic recording medium rotating synchronously with crankshaft on which data is magnetically recorded and a magnetic sensor spaced apart from the magnetic medium and detecting the signals to produce rotational angle information. The magnetic recording medium is divided into plural tracks including an angle track and a cylinder track. On the angle track, unitary magnetic poles, serving as the magnetically recorded data are provided with a pitch P corresponding to the angle to be detected. The cylinder track contains unitary magnetic poles arranged adjacent those with a angle track in the pitch P and at locations which are determined by the number of cylinders of the engine. The polarities of the unitary magnetic poles on the cylinder track are the in same arrangement as those of the unitary magnetic poles of the angle track. No magnetic interference occurs between the unitary magnetic poles of the angle track and three of the cylinder track, so that angle signals and cylinder signals can be obtained with high accuracy.

REFERENCES:
patent: 4262526 (1981-04-01), Makita et al.
patent: 4338813 (1982-07-01), Hunninghaus et al.
patent: 4594548 (1986-06-01), Takahashi et al.
Miyashita, K. et al. Absolute Magnetic Rotary Encoder, International Conference on Industrial Electronics . . . Instrumentation, Nov. 22, '85, pp. 63-67.

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