Propellant anti-theft system

• US 20070164610A1
• Filed: 12/28/2005
• Published: 07/19/2007
• Est. Priority Date: 08/16/2005
• Status: Active Grant

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Hata, Toshiaki
• Granted Patent: US 7,423,353 B2
• Time in Patent Office: Days
• US Class Current: 307/10.200
• CPC Class Codes: B60R 2325/304 Boats
• CPC Class Codes: B60R 25/10 actuating a signalling device
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks

Abstract

A propellant anti-theft system can not only perform permission/stop of operation of a vehicle in a simple and easy manner without using a key, but also suppress the theft and reuse of vehicle parts. The system includes a portable device and an on-board device installed on the vehicle, and further includes an engine control device, a switch and various units, all of which are connected to the on-board device. The on-board device includes a transmitter receiver, a storage circuit and a control circuit. The portable device includes a transmitter receiver, a storage circuit and a control circuit. The control circuit of the on-board device compares common data possessed by itself and common data stored in microprocessor units of the engine control device and the various units, and unlocks a steering locking section included in the various units and outputs an engine starting permission signal to the engine control device when both of the individual pieces of common data coincide with each other.

Claims

1. A propellant anti-theft system comprising:

an engine and a propellant side device installed on a propellant;

an engine control device and a manually operable switch connected to said propellant side device;

a plurality of units including a steering locking section connected to said propellant side device; and

a portable device that is possessed by a driver of said propellant;

said propellant side device comprising;

a propellant side transmitter receiver for performing two-way communications between said propellant side device and said portable device;

a propellant side storage circuit that stores a verification code for said portable device; and

a propellant side control circuit that is connected to said propellant side transmitter receiver, said propellant side storage circuit and said switch;

said portable device comprising;

a portable device side transmitter receiver for performing two-way communications between said portable device and said propellant side device;

a portable device side storage circuit that stores an inherent encrypted code corresponding to said propellant; and

a portable device side control circuit that is connected to said portable device side transmitter receiver and said portable device side storage circuit;

wherein said propellant side control circuit and said propellant side transmitter receiver send a query signal containing said verification code to said portable device side transmitter receiver in response to an operation signal of said switch;

said portable device side control circuit and said portable device side transmitter receiver receive said signal sent from said propellant side device thereby to read said encrypted code from said portable device side storage circuit, and at the same time to send an answer signal containing said encrypted code corresponding to said query signal to said propellant side transmitter receiver;

when said answer signal corresponds to said query signal, said propellant side control circuit unlocks said steering locking section and at the same time permits starting of said engine;

said engine control device and said plurality of units are provided with microprocessor units installed thereon, respectively;

said respective microprocessor units of said engine control device and said plurality of units have common data between themselves and said propellant side device; and

said propellant side control circuit compares the common data that is possessed by itself and the common data that is stored in said respective microprocessor units with each other, and unlocks said steering locking section and at the same time outputs a signal to permit starting of said engine to said engine control device when both of said common data coincide with each other.

2. The propellant anti-theft system as set forth in claim 1, wherein

said plurality of units include a meter unit;

and

said meter unit includes a microprocessor unit having said common data.

3. The propellant anti-theft system as set forth in claim 1, wherein said common data comprises one and the same data for said plurality of units, propellant specific data to specify an inherent propellant, or unit specific data to specify said plurality of units.

4. The propellant anti-theft system as set forth in claim 1, wherein said common data comprises propellant recognition data for recognizing, through data transmission between said propellant side device and said plurality of units, that said propellant is an inherent propellant.

5. The propellant anti-theft system as set forth in claim 1, wherein when the individual pieces of common data possessed by a predetermined number or all of said plurality of units are different from one another, said propellant side device inhibits starting of said engine installed on said propellant or movement of said propellant.

6. The propellant anti-theft system as set forth in claim 1, wherein said propellant is a motorcycle.