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1. EP1014247 - Hydraulic control apparatus and control method for automobile

Office European Patent Office
Application Number 99105021
Application Date 19.03.1999
Publication Number 1014247
Publication Date 28.06.2000
Publication Kind A3
IPC
G05D 16/20
GPHYSICS
05CONTROLLING; REGULATING
DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
16Control of fluid pressure
20characterised by the use of electric means
G05D 16/20
GPHYSICS
05CONTROLLING; REGULATING
DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
16Control of fluid pressure
20characterised by the use of electric means
F16H 59/72
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
72dependent on oil characteristics, e.g. temperature, viscosity
F16H 61/00
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
F16H 61/02
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
02characterised by the signals used
F16H 61/10
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
10Controlling shift hysteresis
CPC
F16H 61/0251
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
02characterised by the signals used
0202the signals being electric
0251Elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
F16H 59/72
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
59Control inputs to ; control units of; change-speed-, or reversing-gearings for conveying rotary motion
68Inputs being a function of gearing status
72dependent on oil characteristics, e.g. temperature, viscosity
F16K 31/0675
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
KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
31Actuating devices;; Operating means; Releasing devices
02electric
06using a magnet ; , e.g. diaphragm valves, cutting off by means of a liquid
0675Electromagnet aspects, e.g. electric supply therefor
Applicants HITACHI LTD
Inventors MARUMOTO KATSUJI
MINOWA TOSHIMICHI
OCHI TATSUYA
KASHIWAYA MINEO
KUROIWA HIROSHI
Priority Data 1998361387 18.12.1998 JP
Title
(DE) Hydraulisches Steuergerät und Steuerverfahren für ein Fahrzeug
(EN) Hydraulic control apparatus and control method for automobile
(FR) Dispositif de commande hydraulique et procédé de commande pour une automobile
Abstract
(EN)
A linear solenoid (9) is actuated with a PWM signal from a hydraulic control circuit (10) to control a coupling state of a clutch in an automatic transmission (1). The linear solenoid (9) is controlled with a hydraulic pressure instruction and a detected current value, and the linear solenoid (9) is further controlled with a detected solenoid current.

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