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:
Feb. 02, 1993
Filed:
Sep. 28, 1990
Applicant:
Inventors:
Hideaki Ito, Iwata, JP;
Masanori Miyamoto, Iwata, JP;
Assignee:
Yamaha Hatsudoki Kabushiki Kaisha, Iwata, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
123 / ; 123 / ; 123 / ; 123501 ;
Abstract
A two-cycle diesel engine and means for operating it to improve the performance by increasing the compression ratio by the closing of a supplemental exhaust port under light loads and low speeds. In order to reduce combustion chamber temperature and reduce nitrous oxide emissions, the injection timing is advanced an additional increment during the closing of the supplemental exhaust port. Various control strategies are described which involve either quickly raising the compression ratio and retarding the injection timing.