HYDRAULIC PRESSURE SUPPLY DEVICE

PROBLEM TO BE SOLVED: To improve response delay of a hydraulic actuation device while suppressing occurrence of a malfunction of the hydraulic actuation device caused by air accumulated in an oil passage.SOLUTION: A hydraulic pressure supply device 2 includes: an oil passage 61 (first oil passage) to which oil (hydraulic fluid) is always supplied during operation of an engine 1; an oil passage 65 (second oil passage) which communicates with a valve stop mechanism 25b (hydraulic actuation device), and to which the oil is supplied by opening of a first direction changeover valve 56 (control valve) when a specific condition is satisfied; and a communication passage 66 (connection oil passage) causing the oil passage 61 and the oil passage 65 to communicate with each other and having an orifice unit 30A which allows the oil in the oil passage 61 to be introduced into the oil passage 65 while reducing a pressure thereof in closing of the first direction changeover valve in the halfway thereof. The orifice unit 30A has an air vent Ab for releasing air to the outside.SELECTED DRAWING: Figure 5 【課題】油路に溜まったエアによって油圧作動装置に誤動作が生じることを抑制しながら当該油圧作動装置の応答遅れを改善する。【解決手段】油圧供給装置２は、エンジン１の作動中にオイル（作動油）が常時供給される油路６１（第１油路）と、弁停止機構２５ｂ（油圧作動装置）に連通し、特定の条件が満たされたときに第１方向切替弁５６（制御弁）の開弁操作によりオイルが供給される油路６５（第２油路）と、油路６１と油路６５油路とを連絡する油路であって、かつ、前記第１方向切替弁の閉弁時に油路６１内のオイルがその圧力を減圧しながら油路６５に導入することを許容するオリフィスユニット３０Ａを途中に備えた連通路６６（連結油路）とを備え、オリフィスユニット３０Ａは、エアを外部に逃がすエア抜き部Ａｂを備えている。【選択図】図５