Keyless vehicle entry and engine starting system

U.S. Patent Number: 5736935

Abstract: A vehicle transceiver is employed in a keyless entry system for gaining entry into a vehicle and also for starting the vehicle's engine. The transceiver includes means for providing a start engine signal representative that the vehicle's engine is to be started, a brake signal representative that the vehicle's brake pedal has been depressed and a seat occupied signal representative that an occupant is located in the vehicle's driver seat. In response to these three signals, the transceiver transmits an interrogation signal to a remote transceiver which responds with a reply signal. The reply signal from the remote transceiver includes a security code that uniquely identifies the remote transceiver from similar remote transceivers. The vehicle's transceiver stores a prestored security code representative of a remote transceiver that may validly gain entry into the vehicle. The received security code from the remote transceiver and the prestored security code are compared and if a match takes place, the engine may be started.

Inventors: Lambropoulos; George P. (Grosse Pointe Woods, MI)

Assignee: TRW Inc. (Lyndhurst, OH)

Application Number: 08/404,165

Issued: 1998-04-07

Expired: 2006-04-07

Classes: 340/825.69 ; 123/179.2; 123/179.3; 340/5.61; 340/825.72; 477/99

Field of search: 340/825.69,825.31,825.72 364/424.1,424.099 123/179.2,179.3,179.4 477/99

Click the image above to view patent images at uspto.gov within a frame.

Click here for the fulltext page on uspto.gov within a frame.