Arrangement in motor vehicles for indicating engine loads
US4586472A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1984 |
| Grant date | May 6, 1986 |
| Priority date | — |
| Expiry date | Nov 6, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2009/0284
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An arrangement in a motor vehicle informing the driver of fuel-economy conditions while driving the vehicle, by creating at the limit at which uneconomic driving commences a pressure point at which further depression of the pedal is resisted. The accelerator pedal is acted upon by a vacuum assembly controlled by a control valve having an auxiliary unit which compares the engine intake pressure with a limit pressure for uneconomic driving and which, when the intake pressure exceeds the limit pressure, switches the control valve to a position in which the vacuum assembly is ventilated to atmosphere, whereupon the assembly is set to an inactive state, and automatically resets the control valve to a normal working position, when the intake pressure lies beneath the limit pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.