Title:
【発明の名称】車両のタイヤ空気圧判定装置
Document Type and Number:
Japanese Patent JP2780887
Kind Code:
B2
Abstract:
A vehicle system for detecting a reduction in tire pressure senses wheel speeds (at 16FC-16RR), detects the difference between the front wheel speeds and a difference between the rear wheel speeds (at 24,29; 25,30) and converts them to corresponding steering angles at (31,32). The averages of these angles (from 33,34) are compared (at 35,36) with the average (from 39) of a reference steering angle calculated at (42) from vehicle speed (V) and lateral acceleration of the vehicle (from 19), and corresponding to the steering angle expected at normal tire pressure. If the difference between the compared steering angles falls outside a predetermined range set at (43,44), comparator 40 issues a tire pressure reduction signal to alarm 23. The difference (slip) between the average first and rear wheel speeds is also calculated (at 27,28,45), and compared (at 46) with a reference slip value calculated at (47) from vehicle speed V and engine torque determined (at 32) from accelerator pedal position (from 22) and transmission setting (from 26). If the difference between the compared slip values is greater than a predetermined amount (from 49), comparator 48 issues a tire pressure reduction signal to alarm 23.
Inventors:
Takashi Nishihara
Kei Kei
Shiraishi Master
Kei Kei
Shiraishi Master
Application Number:
JP4601692A
Publication Date:
July 30, 1998
Filing Date:
January 31, 1992
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
B60C23/06; (IPC1-7): B60C23/06
Domestic Patent References:
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Other References:
【文献】特許2503386(JP,B2)
Attorney, Agent or Firm:
Yoichiro Shimoda (2 outside)