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:
Oct. 07, 2008
Filed:
Nov. 07, 2005
Takanobu Ikari, Tsuchiura, JP;
Yoshinori Ohwada, Kasumigaura, JP;
Yoshinori Furuno, Tsuchiura, JP;
Shinji Akino, Ushiku, JP;
Daisuke Takagi, Kasumigaura, JP;
Takanobu Ikari, Tsuchiura, JP;
Yoshinori Ohwada, Kasumigaura, JP;
Yoshinori Furuno, Tsuchiura, JP;
Shinji Akino, Ushiku, JP;
Daisuke Takagi, Kasumigaura, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
An engine protection system for a construction machine can individually diagnose the exhaust temperature specific to each cylinder of an engine corresponding to an engine revolution speed in order to find an abnormal condition of each engine cylinder in advance. A revolution speed sensordetects revolution speed of an engine mounted in the construction machine and, a plurality, e.g.,, cylinder temperature sensors-detect exhaust temperatures of respective cylinders of the engine. A data recording unitand a display controllerstore the detected engine revolution speed and the detected exhaust temperatures of the respective cylinders. Trend data, which is produced based on the stored data, is sent to an office via a portable terminal and the display controlleroutputs, a signal for playing back and displaying snapshots based on the stored data to a display unitdisposed in the cab