FLOW CHANNEL STRUCTURE

PROBLEM TO BE SOLVED: To provide a flow channel structure capable of more properly opening and closing a pilot-type opening/closing valve.SOLUTION: A flow channel structure of an engine cooling system 1 has a sub-pump 15 for supplying a heat medium to a heater core 17 through a third flow channel W3...

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Bibliographische Detailangaben
1. Verfasser:	TAKAHASHI TSUNESATO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ACTUATING-FLOATS ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING,OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODSSPACES OF VEHICLES BLASTING COCKS COOLING OF INTERNAL-COMBUSTION ENGINES COOLING OF MACHINES OR ENGINES IN GENERAL DEVICES FOR VENTING OR AERATING ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS STEAM ENGINES TAPS THERMAL INSULATION IN GENERAL TRANSPORTING VALVES VEHICLES IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a flow channel structure capable of more properly opening and closing a pilot-type opening/closing valve.SOLUTION: A flow channel structure of an engine cooling system 1 has a sub-pump 15 for supplying a heat medium to a heater core 17 through a third flow channel W3, and a pilot-type opening/closing valve 16 disposed in the third flow channel W3. The opening/closing valve 16 has: a main valve 160 disposed in the third flow chanel W3; a pilot flow channel Wp connecting an upstream side and a downstream side of parts where the sub pump 15 and the main valve 160 in the third flow channel W3 are disposed, and provided with a back pressure chamber; and a pilot valve 162 for opening and closing the pilot flow channel Wp. The main valve 160 opens and closes the third flow channel W3 on the basis of change in internal pressure of the back pressure chamber accompanying an opening/closing motion of the pilot valve 162.SELECTED DRAWING: Figure 1 【課題】より適切にパイロット式の開閉弁を開閉動作させることのできる流路構造を提供する。【解決手段】エンジン冷却システム１の流路構造は、第３流路Ｗ３を介してヒータコア１７に熱媒体を供給するサブポンプ１５と、第３流路Ｗ３に設けられるパイロット式の開閉弁１６とを備える。開閉弁１６は、第３流路Ｗ３に設けられる主弁１６０と、第３流路Ｗ３におけるサブポンプ１５及び主弁１６０が配置される部分の上流及び下流を連通させるとともに、背圧室が設けられるパイロット流路Ｗｐと、パイロット流路Ｗｐを開閉させるパイロット弁１６２とを有する。主弁１６０は、パイロット弁１６２の開閉動作に伴う背圧室の内部圧力の変化に基づいて第３流路Ｗ３を開閉させる。【選択図】図１