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:
Dec. 24, 1996
Filed:
Nov. 29, 1995
Jeong Y Seo, Changwon, KR;
Myung H Song, Changwon, KR;
Samsung Heavy Industries Co., Ltd., Seoul, KR;
Abstract
An apparatus for and a method of controlling the engine RPM in hydraulic construction equipment, being capable of detecting a neutral valve position corresponding to the idle state of the construction equipment and controlling the engine to drive at a low RPM while the construction equipment is in its idle state, thereby achieving a reduced noise generation and reduced fuel consumption. The apparatus includes an engine RPM detecting unit for detecting the RPM of the engine, an engine RPM control unit for controlling the engine RPM, a pressure detecting unit for detecting the pressure in a fluid line connected between a hydraulic pump driven by the engine and main valves for actuating actuators, and a control unit for determining whether every main valve is in its neutral position, through a functional computation for a pressure value detected by the pressure detecting unit with a predetermined reference value, and controlling the engine RPM controlling unit to decrease the engine RPM when every main valve is determined as being in its neutral position.