Patent · US Expired

Motor brake for air-compressing internal combustion engines

US5150678A · kind A · utility

17Cited by

5References

6Claims

0Family size

Assignee

MAN Nutzfahrzeuge AG · DE

Inventors

Dieter Wittmann · Leverkusen, DE
Heribert Kubis · Nuremberg, DE

Key dates

Filing date	Jul 12, 1990
Grant date	Sep 29, 1992
Priority date	—
Expiry date	Jul 12, 2010

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02B3/06
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A motor brake for air-compressing internal combustion engines is provided. To improve the braking power of the engine, it is proposed to combine a motor brake having a butterfly valve to throttle engine exhaust with a motor brake where an exhaust valve, in addition to the cam drive, can be raised slightly during the exhaust stroke via a piston. With this inventive combination, braking work can be performed not only in the exhaust stroke, but also in the compression stroke, so that the braking power can be increased by about 50 to 60%, and relative to conventional exhaust brakes by about 80 to 90%, and is increased to the order of magnitude of the effective engine power.

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