JPH021427U

JPH021427U -

Info

Publication number: JPH021427U
Application number: JP7820288U
Authority: JP
Priority date: 1988-06-13
Filing date: 1988-06-13
Publication date: 1990-01-08

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例に係るエンジンの
サブ冷却装置の冷却回路図である。第２図は本考
案の第２実施例に係るエンジンのサブ冷却装置の
冷却回路図である。第３図は本考案の第３実施例
に係るエンジンのサブ冷却装置の冷却回路図であ
る。第４図は本考案の第４実施例に係るエンジン
のサブ冷却装置の冷却回路図である。第５図は従
来におけるエンジンのサブ冷却装置の冷却回路図
である。〔主要な部分の符号の説明〕、１…循環回路、
１Ａ…回路部分、１Ｂ…合流地点、２…サブラジ
エータ、３…水冷式インタークーラ、５…切換弁
、６…バイパス路、７…蓄冷式アキユムレータ、
８…冷凍サイクル、９…冷却水温度センサ、１０
…制御装置、１２…アクセルペダル開度検出手段
。 FIG. 1 is a cooling circuit diagram of an engine sub-cooling device according to a first embodiment of the present invention. FIG. 2 is a cooling circuit diagram of an engine sub-cooling device according to a second embodiment of the present invention. FIG. 3 is a cooling circuit diagram of an engine sub-cooling device according to a third embodiment of the present invention. FIG. 4 is a cooling circuit diagram of an engine sub-cooling device according to a fourth embodiment of the present invention. FIG. 5 is a cooling circuit diagram of a conventional engine sub-cooling device. [Explanation of symbols of main parts], 1... Circulation circuit,
1A...Circuit part, 1B...Confluence point, 2...Sub radiator, 3...Water-cooled intercooler, 5...Switching valve, 6...Bypass path, 7...Cold storage type accumulator,
8... Refrigeration cycle, 9... Cooling water temperature sensor, 10
...control device, 12...accelerator pedal opening detection means.

Claims

[Claims for Utility Model Registration] (1) In a sub-cooling system for an engine that is equipped with a heat exchanger such as a sub-radiator and a liquid-cooled intercooler in the middle of a circulation circuit, a cooling system from the sub-radiator of the circulation circuit to a water-cooled intercooler A refrigerant storage type accumulator is installed in the middle of the refrigeration cycle and provides a source of cold heat to the refrigerant in the bypass path, in the middle of the bypass path that connects to the circuit section downstream of the sub-radiator. In addition, a refrigerant temperature sensor is installed between the intercooler inlet side of the circulation circuit and the confluence point of the bypass path, and a temperature signal from this refrigerant temperature sensor indicates that the refrigerant temperature exceeds a predetermined temperature. 1. A sub-cooling control device for an engine, comprising: a control device for controlling a switching valve so that refrigerant flows into a bypass path when the engine cools down. (2) In an engine sub-cooling system that includes a sub-radiator and a heat exchanger such as a liquid-cooled intercooler in the circulation circuit, a circuit on the downstream side of the sub-radiator from the sub-radiator to the water-cooled intercooler in the circulation circuit. A refrigerant storage type accumulator is installed in the middle of the refrigeration cycle and provides a source of cold heat to the refrigerant in the bypass path, and a switching valve is installed at the branch point of the circulation circuit and the bypass path. The engine sub-cooling control further comprises a control device that controls a switching valve to cause the refrigerant to flow into the bypass path when the engine load detected by the engine load detection means is equal to or higher than a predetermined engine load. Device. (3) In an engine sub-cooling system that includes a sub-radiator and a heat exchanger such as a liquid-cooled intercooler in the circulation circuit, a circuit on the downstream side of the sub-radiator from the sub-radiator to the water-cooled intercooler in the circulation circuit. A refrigerant storage type accumulator is installed in the middle of the refrigeration cycle and provides a source of cold heat to the refrigerant in the bypass path, and a switching valve is installed at the branch point of the circulation circuit and the bypass path. Furthermore, a refrigerant temperature sensor is provided between the intercooler inlet side of the circulation circuit and the confluence point of the bypass path, and upon receiving a temperature signal from the refrigerant temperature sensor and an engine load signal from the engine load detection means, the refrigerant temperature is determined to a predetermined value. and a control device that controls a switching valve to cause refrigerant to flow into a bypass passage when the engine load detected by the engine load detection means is equal to or higher than a predetermined engine load. sub-cooling control device.