Receiver for monitoring vehicle tire pressure and associated transmitter for remote control of other elements of the vehicle

• US 6,448,892 B1
• Filed: 09/05/2000
• Issued: 09/10/2002
• Est. Priority Date: 09/03/1999
• Status: Expired due to Term

• Current Assignee: Visteon Global Technologies Incorporated (Visteon Corporation)
• Original Assignee: Sagem SA (Safran SA)
• Inventors: Delaporte, Francis
• Primary Examiner(s): POPE, DARYL C
• Application Number:
  US09/655,369
• Time in Patent Office: 735 Days
• Field of Search: 340/442, 340/447, 340/445, 340/425, 340/426, 340/825.69, 340/825.72, 340/539, 340/517, 340/521, 731/462, 731/464, 731/465, 731/468
• US Class Current: 340/442
• CPC Class Codes: B60C 23/0433 Radio signals

Abstract

A receiver includes circuits (17) for wireless reception of pressure-signal frames configured so as to forward the frames to processing circuits (15) that also process frames representative of other signals and controlled in consequence by frame-discrimination circuits (12, 13, 14). A transmitter is also disclosed that includes circuits for controlling transmission of a frame header with a duration at least equal to that of the header of a tire-pressure monitoring TPMS frame.

Claims

1. A receiver for monitoring tire pressure of tires of a motor vehicle, including receiving means (17) for wireless reception of pressure-signal frames (50) configured so as to forward said frames to a processing means (15) configured to also process frames (70) representative of another type of signal, and frame-discrimination means (12, 13, 14) are provided which are configured to control in consequence the processing means (15), wherein the receiving means (17) are configured to pass alternately from a standby state to an alert state according to a predetermined cycle (41, 42), and the discrimination means (12, 13, 14) are configured to discriminate between the two particular types of frames (50, 70) by discrimination between two particular data-transmission frequencies in two respective headers (51, 71) of the frames (50, 70), with durations at least equal to the cycle (41, 42).

2. The receiver according to claim 1, in which the discrimination means (12, 13, 14) are configured to recognize, in the received frames (50, 70), two data patterns (52, 72) particular to each type of frame (50, 70).

3. A transmitter for wireless remote control of elements of a motor vehicle, for controlling the receiver of claim 1, including wireless transmission means (63) and means (61, 62) for control of the transmission means (63), which are configured to transmit via them a frame (70) of remote-control bits, characterized in that the control means (61, 62) are configured to transmit a frame header (71) with duration at least equal to that of the header (51) of a tire-pressure monitoring TPMS frame.

4. The transmitter according to claim 3, in which the transmission means (63) include a radio transmitter with frequency-modulated carrier.

5. The transmitter according to claim 3, for remote control of door locks of the vehicle.