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:
Jun. 06, 2017
Filed:
Dec. 11, 2012
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventors:
Yosuke Tanabe, West Bloomfield, MI (US);
Donald J. McCune, Farmington Hills, MI (US);
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 31/06 (2006.01); F04B 7/00 (2006.01); F02D 41/38 (2006.01); F02M 59/36 (2006.01); F02D 41/20 (2006.01);
U.S. Cl.
CPC ...
F16K 31/0655 (2013.01); F02D 41/3845 (2013.01); F04B 7/0076 (2013.01); F02D 2041/2055 (2013.01); F02D 2041/2068 (2013.01); F02D 2200/025 (2013.01); F02D 2200/0602 (2013.01); F02M 59/367 (2013.01); Y10T 137/0318 (2015.04);
Abstract
A method and apparatus for controlling a solenoid actuated inlet valve to a pump chamber of a piston pump. A control circuit energizes the solenoid to open the inlet valve in synchronism with the reciprocation of the piston and thereafter de-energize the solenoid to initiate closure of the inlet valve. The inlet valve is decelerated following de-energization of the solenoid thus effectively reducing engine noise attributable to the inlet valve.