Anti-theft System for disabling a vehicle engine that includes a multi-contact switch for disconnecting the battery and loading the vehicle electrical system
US5977654A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Oct 13, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R25/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle anti-theft system that disables a vehicle engine upon detection of an unauthorized vehicle start-up, after the engine is running, by disconnecting the vehicle battery and draining the vehicle electrical system voltage to ground through a resistor. When the system is armed, it monitors whether the engine is running and has been recently started by detecting vibrations, fluctuations in the VES voltage, and the actual VES voltage. The system includes an electro-mechanical switch that has a battery internal contact, a vehicle electrical system, the standard battery external terminal, contact and a disconnect contact. When the switch is connected to the battery contact, the vehicle battery is connected in the circuit. When the switch is connected to the vehicle electrical system contact, the system is connected to ground through a resistance and the battery is disconnected from circuit. When the switch is connected to the disconnect contact, the battery is disconnected and the vehicle electrical system is not connected to ground. When the switch is not energized, it is either connected to the battery contact or the disconnect contact. When the switch is energized, the switch w…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.