JPS6317856U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案に係る第１実施例の冷却系統図
、第２図は同上の第３図の―断面図、第３図
は同上の第２図の―断面図、第４図は本考案
に係る第２実施例の吸気マニホールドの断面図、
第５図は従来の吸気加熱装置を示す第２図ないし
は第４図相当図、第６図は従来の冷却系統図であ
る。 １……吸気マニホールド、１ａ……ライザ部、
８……シリンダブロツク、９……シリンダヘツド
、１１……ウオータポンプ、１２……冷却水通路
、１４……ラジエータ、２０……吸気加熱用冷却
水通路、２０ｂ……出口部、２２……ＰＴＣヒー
タ、２４……第１のサーモスタツト弁、２５……
第２のサーモスタツト弁、２６……連通通路、２
７……バイパス通路。 Fig. 1 is a cooling system diagram of the first embodiment of the present invention, Fig. 2 is a sectional view of Fig. 3 of the same above, Fig. 3 is a sectional view of Fig. 2 of the same above, and Fig. 4 is the main A sectional view of the intake manifold of the second embodiment of the invention,
FIG. 5 is a diagram corresponding to FIGS. 2 or 4 showing a conventional intake air heating device, and FIG. 6 is a diagram of a conventional cooling system. 1... Intake manifold, 1a... Riser part,
8... Cylinder block, 9... Cylinder head, 11... Water pump, 12... Cooling water passage, 14... Radiator, 20... Cooling water passage for heating intake air, 20b... Outlet section, 22... PTC Heater, 24...First thermostatic valve, 25...
Second thermostatic valve, 26...Communication passage, 2
7...Bypass passage.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 吸気マニホールドに形成した吸気加熱用冷却水
通路と、前記吸気加熱用冷却水通路から第１のサ
ーモスタツト弁、ラジエータ及びウオータポンプ
を経てシリンダブロツクに至る冷却水循環経路と
、を有する内燃機関の吸気加熱装置において、前
記吸気マニホールドのライザ部に設けられ冷却水
温度が所定値以下の機関運転時に通電される加熱
ヒータと、シリンダヘツドから前記ラジエータを
バイパスしてウオータポンプに至るバイパス通路
と、前記吸気加熱用冷却水通路から分岐し前記冷
却水循環経路に連通接続された連通通路と、該連
通通路に介装され前記第１のサーモスタツト弁に
隣接した第２のサーモスタツト弁と、を備えたこ
とを特徴とする内燃機関の吸気加熱装置。 Intake air heating for an internal combustion engine having an intake air heating cooling water passage formed in an intake manifold, and a cooling water circulation path from the intake air heating cooling water passage to a cylinder block via a first thermostat valve, a radiator, and a water pump. In the device, a heater is provided in the riser portion of the intake manifold and is energized during engine operation when the cooling water temperature is below a predetermined value, a bypass passage from the cylinder head bypassing the radiator to the water pump, and the intake air heating a communication passage branching from the cooling water circulation path and connected to the cooling water circulation path; and a second thermostat valve interposed in the communication passage and adjacent to the first thermostat valve. Features of internal combustion engine intake air heating device.