发明名称 |
Apparatus for detecting revolutions of an internal combustion engine |
摘要 |
In a detecting apparatus for indicating engine revolutions or vehicle speed, a counter is provided to count up, for a predetermined period of time, the number of pulses produced by an angle sensor. To improve the accuracy of the measurement, the time width during which the pulses are counted can be varied in accordance with a rotational speed of the engine. In this way, a larger measurement time period is provided at lower speeds than at higher speeds.
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申请公布号 |
US4274142(A) |
申请公布日期 |
1981.06.16 |
申请号 |
US19790064431 |
申请日期 |
1979.08.07 |
申请人 |
HITACHI, LTD. |
发明人 |
FURUHASHI, TOSHIO;ABE, OSAMU;HIRASAWA, KOTARO;IMAI, MASUMI |
分类号 |
F02D41/34;F02P5/15;G01P3/489;(IPC1-7):G01P3/48;G01R23/02 |
主分类号 |
F02D41/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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