Antitheft interrupt system for vehicle solenoid circuit
US6227158A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1999 |
| Grant date | May 8, 2001 |
| Priority date | — |
| Expiry date | Aug 27, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R25/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle antitheft system includes a MOSFET (418) with associated power and logic circuitry that can be housed within a starter solenoid housing (704) for preventing control current from activating the solenoid unless an authorized enable signal is received. The enable signal can be transmitted by a hand-held rf transmitter. In alternate embodiments, the MOSFET can be disposed in a housing separate from the solenoid and mounted near the solenoid, and the MOSFET can be controlled by an rf-generated enable signal or by an impulse-generated enable signal. In the latter case, the MOSFET is activated to close the solenoid control current circuit path only when a single impulse signal, e.g., from a door latch lock, is activated. If two impulse signals are received, one from, e.g., the door latch lock and another from, e.g., a locking mechanism/switch inside the vehicle, the MOSFET is not activated, to prevent a thief from actuating the system by breaking into the vehicle and unlocking the vehicle door from inside the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.