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. 25, 2001
Filed:
Apr. 21, 2000
Koichi Kawamura, Hirakata, JP;
Seiya Haga, Hirakata, JP;
Komatsu LTD, Tokyo, JP;
Abstract
A data processing unit for a construction machine, the unit being capable of storing the load condition of an engine independently of variations in engine output torque without entailing increases in cost due to additional installation of sensors. This data processing unit is designed such that the rotational speed of the engine when no load is imposed thereon and the actual rotational speed of the engine are detected; combinations of first parameter values and second parameter values are divided into a plurality of regions thereby setting a load map, the first parameter values being the values of the rotational speed of the engine when no load is imposed thereon while the second parameter values are the values of the difference between the rotational speed of the engine when no load is imposed thereon and the actual speed of the engine; detecting time of the first parameter value and the second parameter value of each region in the load map until a certain time elapses is accumulated; and the result of the accumulation for each region of the load map is stored.