Keyless ignition system with delayed security

• US 5,821,631 A
• Filed: 02/07/1997
• Issued: 10/13/1998
• Est. Priority Date: 02/07/1997
• Status: Expired due to Term

• Current Assignee: Clark Equipment Company (Doosan Enerbility Company Limited)
• Original Assignee: Clark Equipment Company (Doosan Enerbility Company Limited)
• Inventors: Jacobson, Scott B., Loraas, Orlan J.
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): Ganjian, Peter
• Application Number:
  US08/796,882
• Time in Patent Office: 613 Days
• Field of Search: 307/9.1-10.8, 364/423.098, 364/423.099, 364/424.037, 364/424.045, 340/425.5, 340/426, 340/430, 340/540, 340/825.3, 340/825.31, 340/825.34, 340/825.44, 180/287, 123/198 DC, 123/198 B, 123/198 DB, 361/171, 361/172
• US Class Current: 340/5.3
• CPC Class Codes: B60R 25/04 operating on the propulsion system, e.g. engine or drive motor

Abstract

A security system for a vehicle includes a keyboard for receiving input codes that comprise user input codes and a start code. A processor is operably coupled to the keyboard for receiving signals indicative of each input user code and the start code, wherein the processor provides an output signal if an input user code corresponds to an user code and is followed by the start code. The processor also provides the output signal if the start code has been entered during an adjustable time period after the vehicle has been turned off. A controlled device is operably connected to the processor and controls a component of the vehicle to allow the vehicle to start when the output signal from the processor is received.

Claims

1. A security system for a vehicle comprising:

a keyboard for receiving input codes comprising user input codes and a start code;

a processor operably coupled to the keyboard for receiving signals indicative of each input code, wherein the processor provides an output signal if an input code corresponds to a first user input code and is followed by the start code, and wherein the processor provides the output signal if the start code has been entered during an adjustable time period after the vehicle has been turned off, the time period being adjusted through entry of a second user input code; and

a controlled device operably connected to the processor and controlling a component of the vehicle to allow the vehicle to start when the output signal from the processor is received.

2. The security system of claim 1 wherein the time period is adjustable in a range from zero to a selected maximum value.

3. The security system of claim 1 wherein the time period is selected from a plurality of selected time periods.

4. The security system of claim 1 wherein the processor provides the output signal if the second user input code is followed by the start code.

8. The security system of claim 1 wherein the second user input code is valid if entered only after the first user input code.

5. A keyless security system for a vehicle comprising:

a keyboard for receiving input codes comprising a user code, a master code and a start code;

a controlled device for controlling a component of the vehicle to allow the vehicle to start; and

a processor operably coupled to the keyboard for receiving signals indicative of each input code and operably coupled to the controlled device for providing an output signal for controlling the controlled device, wherein the processor provides an output signal only if an input code corresponds to the user code and is followed by the start code or if the start code has been entered during an adjustable time period after the vehicle has been turned off, the time period being adjusted through entry of the master code.

6. The keyless security system of claim 5 wherein the time period is adjustable in a range from zero to a selected maximum value.

7. The keyless security system of claim 5 wherein the time period is selected from a plurality of selected time periods.