Brake controlled ignition retarder
US3939948A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1975 |
| Grant date | Feb 24, 1976 |
| Priority date | — |
| Expiry date | Jan 16, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An ignition retarding device which cuts off the usual vacuum ignition advance to retard the ignition when the brakes are actuated or when the engine speed drops below a predetermined value, there being a further device responsive to engine temperature to restore the vacuum ignition advance whenever the temperature of the engine rises above a predetermined value. The speed is measured by an electronic tachometer whose input is connected across the distributor points and whose output is fed through a voltage comparator and an amplifier to control the energization of an electrically operated valve. The override brake and temperature signals are obtained by connections to the usual brake switch and temperature switch. Provision is made for use of the equipment with automotive vehicles either in which the brake switch is between the brake light and ground or between the battery and the brake light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.