HYDRAULIC CONTROL DEVICE OF TRANSMISSION

• Main Authors: TANAKA HIROYASU, IMAJI SHOHEI
• Format: Patent
• Language: English; Japanese
• Published: 22.08.2019
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a hydraulic control device of a transmission which can improve the quality of gear change control.SOLUTION: A hydraulic control device of a transmission comprises: the transmission (belt-type continuously variable transmission) CVT; a mechanical oil pump 77 arranged as a hydraulic pressure supply source of the transmission CVT, and driven by an engine 1; an electric oil pump 79 driven by an electric motor 78 being a drive source different from the engine 1; a gear change control part 8a for controlling a gear change of the transmission CVT; a pump changeover part 8b included in the gear change control part 8a, and switching a drive state of the electric oil pump 79 at a gear change; a feedback correction part 8c included in the gear change control part 8a, and feedback-controlling the hydraulic pressure supplied to the transmission CVT on the basis of a difference between target pressure and actual pressure; and a feedback correction regulation part 8d for regulating the feedback control for a prescribed time after a switched time point when the gear change control part 8a switches the drive state of the electric oil pump 79.SELECTED DRAWING: Figure 1 【課題】変速制御品質向上を図ることが可能な変速機の油圧制御装置を提供すること。【解決手段】変速機（ベルト式無段変速機）ＣＶＴと、変速機ＣＶＴの油圧供給源として設けられ、エンジン１により駆動されるメカオイルポンプ７７、および、エンジン１とはとは異なる駆動源である電動モータ７８に駆動される電動オイルポンプ７９と、変速機ＣＶＴの変速に関する制御を行う変速制御部８ａと、変速制御部８ａに含まれ、変速に際し、電動オイルポンプ７９の駆動状態を切り替えるポンプ切替部８ｂと、変速制御部８ａに含まれ、変速機ＣＶＴへの供給油圧を、目標圧と実圧との差分に基づいて、フィードバック制御するフィードバック補正部８ｃと、変速制御部８ａは、電動オイルポンプ７９の駆動状態を切り替えた時には、切り替えた時点から所定の間、フィードバック制御を規制するフィードバック補正規制部８ｄと、を備える変速機の油圧制御装置とした。【選択図】図１