To provide an on-vehicle receiver and a tire air pressure monitoring system that, while suppressing an increase in a dark current during off-state of a starting switch, are able to receive both a frame including information on a tire air pressure and a specific radio wave transmitted by a portable machine.SOLUTION: An integrated receiver 3 includes: a radio wave receiving unit 31 that receives a frame including information on tire air pressure transmitted at a predetermined regular transmission cycle by a TPMS transmitter and also receives a specific radio wave emitted by a portable machine; and a TPMS control unit 33 that detects an occurrence of a tire air pressure reduction. While a starting switch SSW is off, the TPMS control unit 33 shifts to a SMART reception mode in which the radio wave reception unit 31 is caused to receive the specific radio wave at each predetermined first intermittent cycle, In addition, the TPMS control unit 33 shifts from the SMART reception mode or a power saving mode to a TPMS reception mode in which the radio wave reception unit 31 is caused to receive the frame at each predetermined second intermittent cycle to intermittently monitor a tire air pressure.SELECTED DRAWING: Figure 6
【課題】始動スイッチのオフ中における暗電流の増加を抑制しつつ、タイヤ空気圧に関する情報を含むフレームおよび携帯機が発する特定電波の双方を受信可能な車載受信機、タイヤ空気圧の監視システムを提供する。【解決手段】統合受信機3は、TPMS送信機が所定の定期送信周期で送信するタイヤ空気圧に関する情報を含むフレームおよび携帯機が発する特定電波を受信する電波受信部31と、タイヤ空気圧低下の発生を検出するTPMS制御部33と、を備える。TPMS制御部33は、始動スイッチSSWのオフ中に、所定の第1間欠周期毎に電波受信部31にて特定電波の受信を行わせるSMART受信モードに移行する。また、TPMS制御部33は、所定の第2間欠周期毎にSMART受信モードまたは省電力モードから電波受信部31にてフレームの受信を行わせて間欠的にタイヤ空気圧を監視するTPMS受信モードに移行する。【選択図】図6
ON-VEHICLE RECEIVER AND MONITORING SYSTEM FOR TIRE AIR PRESSURE
車載受信機、タイヤ空気圧の監視システム
2023-07-25
Patent
Electronic Resource
Japanese
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |
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