Patent · US Expired

Device for actuating butterfly throttle valve of an internal combustion engine

US4878470A · kind A · utility

1Cited by

5References

7Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Rainer Burkel · Le Chesnay, FR
Kurt Engelsdorf · Besigheim, DE
Rolf Gawlik · Beilstein, DE
Karl-Heinz Hagele · Lambach, DE

Key dates

Filing date	Oct 13, 1988
Grant date	Nov 7, 1989
Priority date	—
Expiry date	Oct 13, 2008

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D11/06
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A device for actuating a butterfly throttle valve of an internal combustion engine includes a hydraulic setting member for rotating a shaft of the throttle valve. The hydraulic setting member is driven by a branch flow of fuel delivered by a fuel pump and acting as pressure medium. The branch flow passes through a series of connection of adjustable throttles connected in a hydraulic bridge circuit. The throttles are adjusted by a regulating signal corresponding to the difference between an actual position signal delivered by a position sensor coupled to the throttle valve, and a desired position sensor coupled for example to a gas pedal of the motor vehicle.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.