Measuring and testing – Test stand – For engine
Patent
1989-10-11
1991-02-05
Myracle, Jerry W.
Measuring and testing
Test stand
For engine
36443103, G01M 1500
Patent
active
049894480
ABSTRACT:
A cylinder recognition apparatus has a position sensor which generates output pulses indicating prescribed positions of each piston of the engine. Based on a ratio which is a function of the period and pulses width of the output pulses, a microcomputer recognizes a reference cylinder of the engine and generates a series of data values, each value indicating the reference cylinder or one of the other cylinders of the engine. The data series is temporarily stored in a first shift register as a first series and is compared with a normal series by a checking device to determine if the first series is normal. The first series is provided to an engine controller only if it is determined to be a normal series. A second shift register may be provided for temporarily storing, as a second series, a series which was determined to be normal. A comparator compares the contents of the first and second shift registers to make sure that the first series was correctly transferred from one register to the other. The second series is provided to an engine controller only if the comparator determines that the first and second series are the same. If the two series are not the same, the second series is replaced by a normal series from the first shift register.
REFERENCES:
patent: 4700305 (1987-10-01), Lotterbach et al.
patent: 4899281 (1990-02-01), Grimaud et al.
Fukui Wataru
Iwata Toshio
Mitsubishi Denki & Kabushiki Kaisha
Myracle Jerry W.
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