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:
May. 22, 2001
Filed:
Jul. 19, 1999
Applicant:
Inventors:
John B. Bartel, Hedgesville, WV (US);
Joseph H. Schmidt, Hagerstown, MD (US);
Jeffrey S. Zsoldos, Mount Airy, MD (US);
Assignee:
Mack Trucks, Inc., Allentown, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D 1/304 ;
U.S. Cl.
CPC ...
F02D 1/304 ;
Abstract
An engine exhaust braking method and apparatus is provided according to the invention. The engine exhaust braking method includes the steps of actuating an exhaust valve during an intake stroke of the engine, holding the exhaust valve open during a first portion of a compression stroke of the engine, and closing the exhaust valve when a corresponding piston of the engine is more than one-half way through a compression stroke, wherein a cylinder corresponding to the exhaust valve is precharged by higher pressure air from the exhaust manifold.