发明名称 |
Tire air pressure detecting device |
摘要 |
It is an object of the present invention to detect a tire air pressure indirectly with high detection precision. A tire air pressure detecting device includes a speed sensor for outputting a signal corresponding to a rotational speed of a tire, and an electronic control unit which inputs the signal from the speed sensor and performs predetermined arithmetic operations on that signal. The electronic control unit calculates a wheel speed based on the output signal of the speed sensor, performs a frequency analysis for the calculated vehicle speed, and derives a resonance frequency corresponding to the unsprung mass in the vertical and longitudinal directions. The tire air pressure is then detected based on this resonance frequency.
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申请公布号 |
US5553491(A) |
申请公布日期 |
1996.09.10 |
申请号 |
US19930168093 |
申请日期 |
1993.12.17 |
申请人 |
NIPPONDENSO CO., LTD. |
发明人 |
NAITO, TOSHIHARU;TAGUCHI, TAKEYASU;KAMIYA, MASAHIKO;FUJIWARA, KENJI |
分类号 |
B60C23/06;(IPC1-7):B60C23/02 |
主分类号 |
B60C23/06 |
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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