Ignition current sensor for an electronic speed control system
US4495913A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1983 |
| Grant date | Jan 29, 1985 |
| Priority date | — |
| Expiry date | Oct 18, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P2017/003
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electronic circuit for disengaging an electronic speed control system when the rate of change of the automobile engine speed exceeds a predetermined amount is disclosed. A ferrite or powdered iron ring current transformer generates an input signal to the electronic circuit from one of the spark plug wires in the engine. The pulses from the ring current transformer are passed through a monostable multivibrator circuit and a filter network to a differentiator. The output of the differentiator is connected to a high limit detector and a low limit detector. When the rate of change of engine speed exceeds a predetermined amount, a signal is generated to disengage the speed control circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.