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1. (US20110257847) Vehicle speed estimator and traction control device

Office : United States of America
Application Number: 13142053 Application Date: 25.12.2009
Publication Number: 20110257847 Publication Date: 20.10.2011
Grant Number: 08538635 Grant Date: 17.09.2013
Publication Kind : B2
Prior PCT appl.: Application Number:PCTJP2009071585 ; Publication Number: Click to see the data
IPC:
G05D 3/00
G PHYSICS
05
CONTROLLING; REGULATING
D
SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
3
Control of position or direction
Applicants: Uematsu Koji
Komatsu Ltd.
Hatake Kazuhiro
Nomura Azumi
Inventors: Uematsu Koji
Hatake Kazuhiro
Nomura Azumi
Agents: Fish & Richardson P.C.
Priority Data: 2009-002777 08.01.2009 JP
Title: (EN) Vehicle speed estimator and traction control device
Abstract: front page image
(EN)

A vehicle speed estimator includes a unit that selects a minimum rotation speed among rotation speeds of wheels detected by a rotation speed detector and calculates a reference wheel speed of a construction vehicle at every predetermined time. The unit includes: a variable filter processor that performs a low-pass filter processing to the minimum rotation speed, the variable filter processor having a variable time constant; and a time constant changer that changes the time constant of the variable filter processor in accordance with travel conditions of the construction vehicle.


Also published as:
EP2374680JPWO2010079705JP2012192919JP2012192920EP2581287EP2581288
US20130131934US20130131935CN102171085CN103342127CN103350700WO/2010/079705