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:
Jan. 25, 2000
Filed:
Jul. 03, 1997
Tadaaki Makino, Aichi-ken, JP;
Shigeiku Enomoto, Aichi-ken, JP;
Nippon Soken, Inc., Nishio, JP;
Abstract
A high-pressure pump for use in a fuel injection system for diesel engines is provided which includes a plunger slidably disposed within a chamber formed in a pump housing to define a pressure chamber whose volume is changed according to sliding movement of the plunger, a check valve disposed within a fluid inlet line extending from an inlet port to the pressure chamber, and a solenoid valve disposed within the fluid inlet line upstream of the check valve. The check valve establishes fluid communication between the inlet port and the pressure chamber during a fluid suction operation wherein the fluid is sucked into the pressure chamber, while blocking the fluid communication between the inlet port and the pressure chamber during a fluid feeding operation wherein the fluid sucked into the pressure chamber is pressurized and discharged from an outlet port. The solenoid valve controls a flow rate of the fluid sucked into the pressure chamber through the check valve. This pump structure is compact in size, consumes less electric power, and is capable of feeding a desired quantity of fuel into the engine accurately.