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US 6,720,869 B2Granted
Tire pneumatic pressure detector
AssigneesDenso Corporation, Daihatsu Motor Co., Ltd.
InventorsTakashi Watanabe, Nobuhiko Makino, Takeshi Hatoh, Takeyasu Taguchi, Osamu Tanaka, Takumo Matsuki
Life of this patent
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Abstract
A tire pneumatic pressure detector includes a tire pneumatic pressure detection unit, a first memory storing data associated with a timing at which the drop of tire pneumatic pressure occurs, a second memory storing second data including one or more of a lapse of time from which the tire pneumatic pressure drop occurs, and third data associated with running distance from the timing when a fault diagnosis signal is input.
Claims6
A tire pneumatic pressure detector comprising:
- tire pneumatic pressure detection means for detecting a tire pneumatic pressure;
- pneumatic pressure drop detection means for comparing the tire pneumatic pressure detected by said tire pneumatic pressure detection means with a predetermined value, and detecting a drop of the tire pneumatic pressure when the tire pneumatic pressure is tower than the predetermined value;
- first memory means for storing first data associated with a timing of the drop of the tire pneumatic pressure;
- second memory means for storing second data including one or more of:
- a lapse of time from said first data, and third data associated with a running distance from a point associated with said first data;
- and
- switching number detection means for detecting a number of switching times of an ignition switch;
- wherein, when the number of switching times detected by said switching number detection means is greater than a predetermined number of times when said tire pneumatic pressure drop detection means detects that the tire pneumatic pressure is higher than said predetermined value, the second data stored in said second memory means is cleared.
5 more elements
A tire pneumatic pressure detector comprising:
- tire pneumatic pressure detection means for detecting a tire pneumatic pressure;
- pneumatic pressure drop detection means for comparing the tire pneumatic pressure detected by said tire pneumatic pressure detection means with a predetermined value, and detecting a drop of the tire pneumatic pressure when the tire pneumatic pressure is lower than the predetermined value;
- first memory means for storing first data associated with a timing of the drop of the tire pneumatic pressure;
- and
- second memory means for storing second data including one or more of:
- a lapse of time from said fist data, and third data associated with a running distance from a point associated with said first data;
- wherein, the second data is output to a fault-diagnosing device when the fault-diagnosing device inputs a fault diagnosis signal.
4 more elements
Dependencies are inferred from the claim text.