发明名称 |
Apparatus, method and program for detecting decrease in tire air pressure |
摘要 |
An apparatus for detecting a decrease in a tire air pressure includes: a rotation information detection means for periodically detecting tire rotation information regarding the respective wheels of a four-wheel vehicle; a wheel speed calculation means for calculating tire wheel speeds based on the rotation information; a comparison value calculation means for calculating a difference between a sum of wheel speeds of two wheels at one diagonal positions and a sum of wheel speeds of two wheels at the other diagonal positions as a first comparison value and for calculating a difference between a sum of wheel speeds of two wheels at one same side positions and a sum of wheel speeds of two wheels at the other same side positions as a second comparison value; a determination means for determining a tire having a decreased pressure; and an alarming means. The apparatus further includes a conversion means for converting the first comparison value and the second comparison value to a plane for which change amounts of the first comparison value and the second comparison value due to a decreased pressure from the normal value learnt during a time of a normal pressure are unified between front wheels and rear wheels, and the determination means is so configured as to perform a decreased pressure determination by a single determination threshold value.
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申请公布号 |
EP2380759(A2) |
申请公布日期 |
2011.10.26 |
申请号 |
EP20100015674 |
申请日期 |
2010.12.15 |
申请人 |
SUMITOMO RUBBER INDUSTRIES, LTD. |
发明人 |
FUJITA, HAJIME |
分类号 |
B60C23/06 |
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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