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1. WO2008015537 - DIAGNOSTIC SYSTEM FOR AUTOMATIC TRANSMISSION

Publication Number WO/2008/015537
Publication Date 07.02.2008
International Application No. PCT/IB2007/002193
International Filing Date 31.07.2007
Chapter 2 Demand Filed 30.05.2008
IPC
F16H 61/12 2010.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
61Control functions within change-speed- or reversing-gearings for conveying rotary motion
12Detecting malfunction or potential malfunction, e.g. fail safe
F16H 61/68 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
61Control functions within change-speed- or reversing-gearings for conveying rotary motion
68specially adapted for stepped gearings
F16H 61/684 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
61Control functions within change-speed- or reversing-gearings for conveying rotary motion
68specially adapted for stepped gearings
684without interruption of drive
F16H 61/686 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
61Control functions within change-speed- or reversing-gearings for conveying rotary motion
68specially adapted for stepped gearings
684without interruption of drive
686with orbital gears
F16H 63/50 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
63Control outputs to change-speed- or reversing-gearings for conveying rotary motion
40comprising signals other than signals for actuating the final output mechanisms
50Signals to an engine or motor
F16H 59/68 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
59Control inputs to change-speed- or reversing-gearings for conveying rotary motion
68Inputs being a function of gearing status
CPC
F16H 2061/1208
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
61Control functions within ; control units of; change-speed- or reversing-gearings for conveying rotary motion ; ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
12Detecting malfunction or potential malfunction, e.g. fail safe
1208with diagnostic check cycles; Monitoring of failures
F16H 2061/1268
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
61Control functions within ; control units of; change-speed- or reversing-gearings for conveying rotary motion ; ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
12Detecting malfunction or potential malfunction, e.g. fail safe
1256characterised by the parts or units where malfunctioning was assumed or detected
126the failing part is the controller
1268Electric parts of the controller, e.g. a defect solenoid, wiring or microprocessor
F16H 2200/0052
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
2200Transmissions for multiple ratios
003characterised by the number of forward speeds
0052the gear ratios comprising six forward speeds
F16H 2200/201
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
2200Transmissions for multiple ratios
20Transmissions using gears with orbital motion
2002characterised by the number of sets of orbital gears
201with three sets of orbital gears
F16H 2200/2051
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
2200Transmissions for multiple ratios
20Transmissions using gears with orbital motion
203characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
2051with eight engaging means
F16H 61/12
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
61Control functions within ; control units of; change-speed- or reversing-gearings for conveying rotary motion ; ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
12Detecting malfunction or potential malfunction, e.g. fail safe
Applicants
  • TOYOTA JIDOSHA KABUSHIKI KAISHA [JP]/[JP] (AllExceptUS)
  • NIWA, Kenji [JP]/[JP] (UsOnly)
  • SUGIMURA, Toshio [JP]/[JP] (UsOnly)
  • MIZOBUCHI, Masayasu [JP]/[JP] (UsOnly)
Inventors
  • NIWA, Kenji
  • SUGIMURA, Toshio
  • MIZOBUCHI, Masayasu
Priority Data
2006-21232803.08.2006JP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DIAGNOSTIC SYSTEM FOR AUTOMATIC TRANSMISSION
(FR) SYSTÈME DE DIAGNOSTIC POUR TRANSMISSION AUTOMATIQUE
Abstract
(EN)
A diagnostic system for an automatic transmission is provided in which a microcomputer determines that torque that can drive the driving wheels of the vehicle is not transmitted to an output shaft of the automatic transmission when the vehicle is stopped and the ignition key is operated to the OFF position (steps S1OO, S11O), and performs forced energization of solenoids of solenoid valves associated with respective friction devices of the transmission (step S120), while monitoring current passing through the solenoid valves (step S130). If the current monitored does not match the current for energizing any of the solenoids, the microcomputer determines that the corresponding solenoid valve is at fault. Thus, the diagnostic system appropriately determines the presence of a fault of each solenoid valve for controlling the hydraulic pressure to each friction device, with increased flexibility and freedom.
(FR)
La présente invention concerne un système de diagnostic pour une transmission automatique dans lequel un micro-ordinateur détermine que le couple qui peut commander les roues motrices du véhicule n'est pas transmis vers un arbre de sortie de la transmission automatique du véhicule lorsque le véhicule est à l'arrêt et la clé de contact se trouve hors tension (étapes S100, S110), et effectue une excitation forcée des électrovannes associées à des dispositif de frottement respectifs de la transmission (étape S120), tout en surveillant de courant circulant dans les électrovannes (étape S130). Si le courant surveillé ne correspond pas au courant pour l'excitation d'une quelconque parmi les électrovannes, le micro-ordinateur détermine que l'électrovanne correspondante est défaillante. Ainsi, le système de diagnostic détermine de manière appropriée la présence d'une défaillance de chaque électrovalve pour contrôler la pression hydraulique au niveau de chaque dispositif de frottement, avec une flexibilité et une liberté améliorées.
Also published as
KR1020087032060
Latest bibliographic data on file with the International Bureau