JPS6385417U

JPS6385417U -

Info

Publication number: JPS6385417U
Application number: JP17937386U
Authority: JP
Priority date: 1986-11-21
Filing date: 1986-11-21
Publication date: 1988-06-03

Description

[Brief explanation of drawings]

第１図は本考案の実施例を示す暖房系統説明図
、第２図は暖房の制御系統例を示す回路図である
。１……エンジン、２……ラジエータ、３……ウ
オータポンプ、４……排気管、５……排気熱交換
器、６……ヒータコア、７……ヒータブロア、８
……ヒータコツク、９……切換バルブ、１０……
バキユームアクチユエータ、１１……吸入管、１
２……バキユームパイプ、１３……ソレノイドバ
ルブ、１４……圧力開閉弁、１５……ヒータコツ
クスイツチ、１６……ブロアスイツチ、１７……
低温スイツチ、１８……高温スイツチ、１９……
スロツトル開度スイツチ、２０……エンジン回転
スイツチ、２１……第１リレー、２２……第２リ
レー。 FIG. 1 is an explanatory diagram of a heating system showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing an example of a heating control system. 1...Engine, 2...Radiator, 3...Water pump, 4...Exhaust pipe, 5...Exhaust heat exchanger, 6...Heater core, 7...Heater blower, 8
...Heater cock, 9...Switching valve, 10...
Vacuum actuator, 11...Suction pipe, 1
2... Vacuum pipe, 13... Solenoid valve, 14... Pressure opening/closing valve, 15... Heater switch, 16... Blower switch, 17...
Low temperature switch, 18... High temperature switch, 19...
Throttle opening switch, 20...engine rotation switch, 21...first relay, 22...second relay.

Claims

[Scope of utility model registration request]

The engine exhaust pipe is configured with a branched exhaust pipe that passes through the exhaust heat exchanger and a bypass exhaust pipe that bypasses the exhaust heat exchanger, and a switching valve is provided at the branched part, and the switching valve is operated by negative pressure in the engine intake pipe. A vacuum actuator is provided to operate and switch the vacuum actuator, and a solenoid valve is connected between the suction pipe and the vacuum actuator to control the effect of negative pressure in the suction pipe on and off on the vacuum actuator. Installed on the vacuum pipe to
When the switching valve opens the exhaust pipe passing through the exhaust heat exchanger and the heater valve is opened, the heater core is heated by the exhaust heat while the cooling water after cooling the engine flows through the exhaust heat exchanger. At this point, the heat is radiated and heated, and the heating circulation circuit of the cooling water that flows into the engine again, and the switching valve opens the exhaust pipe that passes through the exhaust heat exchanger, and the heater cock is closed. At this time, a circulation circuit for promoting engine warm-up of the cooling water is provided in which the cooling water after cooling the engine is heated by exhaust heat in the exhaust heat exchanger and then flows into the engine again, and the solenoid valve is energized. A low temperature switch that is turned on when the engine is warmed up, a high temperature switch that is turned on when the engine coolant reaches a high temperature, a heater cock switch that turns on and off based on the opening and closing of the heater cock, and a heater blower operation control. In an automotive exhaust heat heating system that is operated by a blower switch, the absolute value difference between the two pressures is set in the vacuum pipe even when the pressure inside the suction pipe is higher or lower than the pressure inside the vacuum actuator. In addition to providing a pressure on/off valve that closes when the temperature drops below the set value, a switch that operates when the low temperature switch is off, and a throttle that operates when the opening of the throttle valve in the engine intake system exceeds the set value. A control circuit is provided that sends a signal to the solenoid valve to switch and hold the switching valve in the bypass exhaust pipe open state when the opening switch and the engine rotation switch that operates when the engine rotation speed exceeds a set value are activated. A heating device using exhaust heat for a vehicle, characterized by the following: