HYDRAULIC CONTROL DEVICE AND METHOD FOR CONTROLLING SAME

• Main Authors: SUGITA KOICHI, MORIFUJI NOBUHIKO, TAKAHASHI SEIICHIRO, HONMA TOMOAKI, KABE TOMOAKI, GOKA HITOSHI, HASHIMOTO YASUYUKI, KATO NOBUHIDE
• Format: Patent
• Language: English; Korean
• Published: 06.09.2016
• 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

무단 변속기에 공급하는 유압을 제어하는 유압 제어 장치이며, 라인압이 입력되는 입력 포트와, 제2 풀리의 유실에 제2 풀리압을 공급하는 출력 포트와, 유실로부터 제2 풀리압을 배출하는 드레인 포트와, 파일럿압에 따라 이동하여, 제2 풀리압을 조압하는 스풀을 갖는 조압 밸브와, 파일럿압을 제어하는 솔레노이드 밸브와, 제2 풀리압 및 제1 풀리의 제1 풀리압에 기초하여 라인압을 제어하는 라인압 제어부와, 라인압과 제2 풀리압을 동일 압력으로 하는 경우에, 파일럿압을 설정압으로부터 일시적으로 변경하는 유압 제어부를 구비한다. A hydraulic control device controls hydraulic pressure supplied to a continuously variable transmission. The hydraulic control device includes a pressure regulating valve, a solenoid valve configured to control the pilot pressure, line pressure control means, and hydraulic control means. The pressure regulating valve includes an input port to which line pressure is input, an output port configured to supply an oil chamber of a second pulley with a second pulley pressure, a drain port configured to discharge the second pulley pressure from the oil chamber, and a spool moving according to pilot pressure to regulate the second pulley pressure. The line pressure control means is configured to control the line pressure on the basis of the second pulley pressure and first pulley pressure of first pulley. The hydraulic control means is configured to temporarily change the pilot pressure from set pressure to configure the line pressure identical to the second pulley pressure.