Vehicle Antitheft Device and Control Method of a Vehicle

• US 20080203815A1
• Filed: 12/25/2003
• Published: 08/28/2008
• Est. Priority Date: 12/26/2002
• Status: Active Grant

• Current Assignee: Fujitsu Ten Limited (DENSO Corporation)
• Original Assignee: Fujitsu Ten Limited (DENSO Corporation)
• Inventors: Tanaka, Shinichi, Ozawa, Takao
• Granted Patent: US 7,859,129 B2
• Time in Patent Office: Days
• US Class Current: 307/10.2
• CPC Class Codes: B60R 25/04 operating on the propulsion system, e.g. engine or drive motor
• CPC Class Codes: B60R 25/1001 Alarm systems associated with another car fitting or mechanism, e.g. door lock or knob, pedals features related to the general power supply B60R25/1018
• CPC Class Codes: B60R 25/1003 Alarm systems characterised by arm or disarm features
• CPC Class Codes: B60R 25/209 Remote starting of engine
• CPC Class Codes: F02N 11/0807 Remote means

Abstract

When a remote start of an engine using a predetermined transmitter is performed, a security regarding theft of a vehicle can be prevented form being significantly deteriorated. The vehicle has a remote engine starter for remotely start an engine and a vehicle antitheft device for activating an alarm when there is a possibility of occurrence of vehicle theft. The remote engine starter and the vehicle antitheft device are connected to each other through a communication line. In a case where an engine start signal is supplied from the transmitter, the remote engine starter is caused to supply a start signal to the vehicle antitheft device through the communication line before causing a contact point closing signal to be supplied to an ignition relay. When the start signal is supplied to the vehicle antitheft device, preventing apparatus, only the security function regarding conditions of no-insertion of an ignition key and an ignition ON is cancelled to be an unvigilant state, and the security function regarding other conditions is maintained to be a vigilant state.

Claims

1. A vehicle antitheft device mounted to a vehicle equipped with a remote start device for starting an engine when a start signal radio-transmitted from a predetermined transmitter is received by an in-vehicle receiver, comprising:

vehicle theft preventing means for preventing the vehicle from being thieved in accordance with a plurality of theft modes, respectively; and

partly stopping means for stopping a theft preventing function corresponding to a part of the theft modes before an engine start by said remote start device is started when said start signal is received by said in-vehicle receiver.

2. The vehicle antitheft device as claimed in claim 1, wherein the vehicle is equipped with a remote stop device that stops the engine when a stop signal radio-transmitted from said predetermined transmitter is received by said in-vehicle receiver, and the vehicle antitheft device is equipped with restoring means for restoring the antitheft function corresponding to said part of the theft modes after an engine stop by said remote stop device is performed when said stop signal is received by said in-vehicle receiver.

3. The vehicle antitheft device as claimed in claim 1, wherein the antitheft function stopped by said partly stopping means is a function to give warning when detection is made that an ignition is turned on in a state where a key is not inserted in an ignition key cylinder.

4. A vehicle antitheft device mounted to a vehicle equipped with a remote start device for starting an engine when a start signal radio-transmitted from a predetermined transmitter is received by an in-vehicle receiver, comprising:

preventing means for preventing the vehicle from being thieved in accordance with a plurality of theft modes, respectively; and

partly stopping means for stopping, after an occurrence of vehicle theft according to a part of the theft modes is detected for at least a first time, an antitheft function corresponding to the part of the theft modes for a predetermined time period.

5. The vehicle antitheft device as claimed in claim 4, wherein the antitheft function stopped by said partly stopping means is a function to give warning when detection is made that an ignition is turned on in a state where a key is not inserted in an ignition key cylinder.

6. A control method of a vehicle equipped with a remote start device for starting an engine when a start signal radio-transmitted from a predetermined transmitter is received by an in-vehicle receiver and an antitheft device for preventing theft of the vehicle in accordance with a plurality of theft modes, respectively, comprising:

a first step of stopping a theft preventing function corresponding to a part of the theft modes by said antitheft device when said start signal is received by said in-vehicle receiver; and

a second step of starting an engine start by said remote start device after the antitheft function corresponding to the part of the theft modes is stopped by said antitheft device.

7. The control method as claimed in claim 6, wherein said vehicle is equipped with a remote stop device that stops the engine when a stop signal radio-transmitted from said predetermined transmitter is received by said in-vehicle receiver, and the control method includes:

a third step of performing an engine stop by said remote stop device when said stop signal is received by said in-vehicle receiver; and

a fourth step of restoring the antitheft function corresponding to said part of the theft modes by said antitheft device after an engine stop by said remote stop device is performed by said third step.