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:
Sep. 03, 2019
Filed:
Nov. 03, 2015
Robert Bosch Gmbh, Stuttgart, DE;
Patrick Weiss, Remseck am Neckar, DE;
Yiping Chen, JiangSu, CN;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to a method for testing an electrically activated actuator in a fuel delivery device () of an internal combustion engine, wherein the electrical actuator is a controllable valve () that is arranged on the inlet side of a high-pressure pump (). The high-pressure pump () conveys fuel into a fuel store () having a pressure controller (). The fuel store () is connected to at least one injector (). The method comprises the following steps: 1) increasing the rotational speed of the high-pressure pump (),) activating the controllable valve () until the pressure in the fuel store () has reached a first low pressure level,) changing the supply of current to the controllable valve () by a first specified value such that the controllable valve () is opened further and simultaneously maximizing an injection amount by means of the at least one injector () until the pressure in the fuel store () has reached a first threshold value,) activating the controllable valve () until the pressure in the fuel store () has reached the first low pressure level again,) determining a further quantity, which depends on the low pressure level and a maximum value of the pressure that was reached in the fuel store ().