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:
Apr. 18, 2017
Filed:
Apr. 19, 2011
Guangdi HU, Shandong, CN;
Shaojun Sun, Shandong, CN;
Dehui Tong, Shandong, CN;
Weichai Power Co., Ltd., Weifang, CN;
Abstract
An apparatus () for controlling the rail pressure of the high-pressure common-rail tube cavity of the high-pressure common-rail fuel system of an engine, comprising an operation condition acquiring device (), which is used for acquiring operation conditions associated with the high-pressure common-rail fuel system of the engine; a fuel quantity metering valve equivalent cross-sectional area determining device () coupled with the operation condition acquiring device (), which is used for determining an equivalent cross-sectional area of the fuel quantity metering valve () by a linear physical model () of fuel quantity metering valve equivalent cross-sectional area based on an acquired operation condition and a target value of the rail pressure of the high-pressure common-rail tube cavity; a signal generating device () coupled with the fuel quantity metering valve equivalent cross-sectional area determining device (), which used for generating a driving signal () for controlling the equivalent cross-sectional area of the fuel quantity metering valve () based on the determined fuel quantity metering valve equivalent cross-sectional area. The apparatus can control the rail pressure of the high-pressure common-rail tube cavity precisely. A method for controlling the rail pressure of the high-pressure common-rail tube cavity of the high-pressure common-rail fuel system of an engine is also disclosed. An apparatus and a method for observing fuel pressure are further disclosed.