Patent · US Expired

Pressure reduction limiter in a combustion engine

US3949717A · kind A · utility

4Cited by

9References

12Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Norbert Rittmannsberger · Stuttgart, DE
Hermann Hoelle
Klaus Bertsch · Frastanz, AT

Key dates

Filing date	Oct 11, 1972
Grant date	Apr 13, 1976
Priority date	—
Expiry date	Oct 11, 1992

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D41/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The air pressure in the intake valve undergoes a sudden decrease upon closure of the throttle valve. This decrease is sensed and opens a bypass which furnishes some air to the air intake means when the throttle is fully closed. The quantity of air so furnished is sufficient to allow combustion in all cylinders of the engine, thereby preventing excessive cooling.

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