James M Prokup

Address:

3610 Orch Lk Rd, W Bloomfield, MI 48324

VIN:

1J4BA5H16AL182586

Make:

JEEP

Model:

WRANGLER UNLIMITED

Year:

2010

US Patent:

57240280, Mar 3, 1998

Filed:

Jun 3, 1997

Appl. No.:

8/868327

Inventors:

James M. Prokup - Westland MI

Assignee:

United Technologies Automotive, Inc. - Dearborn MI

International Classification:

H04Q 100

US Classification:

34082531

Abstract:

A drive-away prevention security system used in connection with an RF remote keyless entry system. A microprocessor and associated circuitry are configured within the head of an ignition key for a vehicle such that when a function switch on the key head is activated, a coded signal is transmitted to be received by a receiver within the vehicle. The receiver deciphers the received coded transmission to determine if a valid signal has been transmitted, and performs a vehicle function, such as locking or unlocking the vehicle doors, if the coded signal is valid. When the ignition key is inserted in the ignition switch of the vehicle, an ignition signal is sent to a microprocessor associated with the receiver. The microprocessor causes an on/off signal to be applied to an oscillator at the ignition switch in accordance with a data scheme. The oscillator energizes a coil at the ignition switch that generates a time-varying magnetic field inductively coupling the magnetic field lines to the coil within the ignition key.