The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 1992
Filed:
Jul. 12, 1990
Dieter Wittmann, Nurnberg, DE;
Heribert Kubis, Nurnberg, DE;
MAN Nutzfahrzeuge Aktiengesellschaft, Munchen, DE;
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.