JPH0296426U

JPH0296426U -

Info

Publication number: JPH0296426U
Application number: JP509189U
Authority: JP
Priority date: 1989-01-20
Filing date: 1989-01-20
Publication date: 1990-08-01

Description

[Brief explanation of drawings]

第１図から第３図はこの考案の実施例に関し、
第１図は第１実施例の全体構成図、第２図は第２
実施例の全体構成図、第３図は第３実施例の全体
構成図、第４図および第５図は従来例に関し、第
４図は従来例の全体構成図、第５図は循環路構成
に関する従来例の全体構成図である。１；エンジン、２；循環路、５ａ；入口側部分
、５ｂ；出口側部分、７；ウオータポンプ、１１
；迂回路、１５；逆止弁、２１，３１；電磁弁。 Figures 1 to 3 relate to embodiments of this invention,
Fig. 1 is an overall configuration diagram of the first embodiment, Fig. 2 is a diagram of the second embodiment.
FIG. 3 is an overall configuration diagram of the third embodiment. FIGS. 4 and 5 are related to the conventional example. FIG. 4 is an overall configuration diagram of the conventional example, and FIG. 5 is the circulation path configuration. FIG. 2 is an overall configuration diagram of a conventional example related to the above. 1; Engine; 2; Circulation path; 5a; Inlet side portion; 5b; Outlet side portion; 7; Water pump; 11
; Detour, 15; Check valve, 21, 31; Solenoid valve.

Claims

[Scope of Claim for Utility Model Registration] In an engine cooling system that circulates cooling water through the water jacket of the engine using a water pump, the cooling water circulation path passing through the water pump includes:
A detour is formed that bypasses the water pump and connects an inlet side portion and an outlet side portion of the water pump of the circulation path, and a normally closed on-off valve is provided in this detour path, so that the water pump An engine cooling device characterized in that the opening/closing valve is set to open when the pressure at the inlet side of the engine is below a predetermined value.