发明授权
- 专利标题： Apparatus for detecting revolutions of an internal combustion engine
- 专利标题（中）： 用于检测内燃机的转速的装置
-
申请号： US64431申请日： 1979-08-07
-
公开(公告)号： US4274142A公开(公告)日： 1981-06-16
- 发明人: Toshio Furuhashi , Osamu Abe , Kotaro Hirasawa , Masumi Imai
- 申请人： Toshio Furuhashi , Osamu Abe , Kotaro Hirasawa , Masumi Imai
- 申请人地址： JPX Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX53-95482 19780807
- 主分类号： F02D41/34
- IPC分类号： F02D41/34 ; F02P5/15 ; G01P3/489 ; G01P3/488 ; G01R23/02
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.