Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (JP2012192920) VEHICLE SPEED ESTIMATOR AND TRACTION CONTROL DEVICE

Office : Japan
Application Number: 2012110953 Application Date: 14.05.2012
Publication Number: 2012192920 Publication Date: 11.10.2012
Publication Kind : A
IPC:
B60W 40/105
B60T 8/175
B60T 8/66
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
W
CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
40
Estimation or calculation of driving parameters for road vehicle drive control systems not related to the control of a particular sub-unit
10
related to vehicle motion
105
Speed
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
T
VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
8
Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
17
Using electrical or electronic regulation means to control braking
175
Brake regulation specially adapted to prevent excessive wheel spin during vehicle acceleration, e.g. for traction control
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
T
VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
8
Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
32
responsive to a speed condition, e.g. acceleration or deceleration
58
responsive to speed and another condition or to plural speed conditions
60
using electrical circuitry for controlling the braking action, the circuitry deriving a control function relating to the dynamic of the braked vehicle or wheel
66
wherein the braking action is responsive to the difference between a computed or other theoretical vehicle speed and an actual speed of a wheel thereof
Applicants: KOMATSU LTD
株式会社小松製作所
Inventors: UEMATSU HIROHARU
植松 弘治
HATAKE KAZUHIRO
畠 一尋
NOMURA YAKUMO
野村 安曇
Agents: 特許業務法人樹之下知的財産事務所
Priority Data: 2009002777 08.01.2009 JP
Title: (EN) VEHICLE SPEED ESTIMATOR AND TRACTION CONTROL DEVICE
(JA) 車両速度推定装置及びトラクションコントロール装置
Abstract:
(EN)

PROBLEM TO BE SOLVED: To provide a vehicle speed estimator capable of estimating vehicle speeds with high precision even in a situation where road conditions for a construction vehicle of all-wheel drive to run dynamically change.

SOLUTION: The vehicle speed estimator includes means 801 that selects the lowest rotational speed of rotational speeds of respective wheels detected by rotational speed detection means and calculates reference wheel speed of the construction vehicle for each predetermined time. The means 801 includes: a variable filter processing section 814 that executes low pass filtering at the lowest rotational speed; a time constant changing section 809 that changes a time constant of the variable filter processing section 814 according to a driving state of the construction vehicle; and a speed change state determination section 808 that determines a state of a transmission used in the construction vehicle. The time constant changing section 809 includes a lock-up switching time constant changing section 813 that changes the time constant of the variable filter processing section 814 when such a state that fixed time does not elapse after a lockup release command is output is determined.

COPYRIGHT: (C)2013,JPO&INPIT


(JA)

【課題】全輪駆動の建設車両が走行する路面状況が動的に変化する状況にあっても、高精度に車両速度を推定することのできる車両速度推定装置を提供すること。
【解決手段】車両速度推定装置は、回転速度検出手段で検出された各車輪の回転速度のうち、最も小さい回転速度を選択し、前記建設車両の参照車輪速度を所定の時間毎に算出する手段801を備え、手段801は、最も小さい回転速度に低域濾波フィルタ処理を行う可変フィルタ処理部814、建設車両の走行状態に応じて、可変フィルタ処理部814の時定数を変更する時定数変更部809、建設車両の変速機の状態を判定する変速状態判定部808を備え、時定数変更部809は、ロックアップの解除指令が出力されてから一定時間経過していない状態にあると判定されたら、可変フィルタ処理部814の時定数を変更するロックアップ切換時定数変更部813を備える。
【選択図】図5


Also published as:
EP2374680JPWO2010079705US20110257847JP2012192919EP2581287EP2581288
US20130131934US20130131935CN102171085CN103342127CN103350700WO/2010/079705