JPH0285828U

JPH0285828U -

Info

Publication number: JPH0285828U
Application number: JP16480988U
Authority: JP
Priority date: 1988-12-19
Filing date: 1988-12-19
Publication date: 1990-07-06

Description

[Brief explanation of drawings]

第１図は本考案の第１実施例としての吸気通路
長可変装置の全体構成図であり、第２図は本考案
の第２実施例としての内燃機関の吸気通路長可変
装置の全体構成図、第３図は第２実施例における
応用例を示す全体構成図、第４図は体積効率とエ
ンジン回転数との関係を示す特性図である。１……サージタンク、２……燃焼室、３……吸
気通路、４……吸気副室、４Ａ……仕切部材、４
ａ，４ｂ……開口部、４ｃ……吸気副室入口、４
ｄ……吸気副室出口、５……切替弁、５ａ，５ｂ
……弁体片、５ｃ，５ｄ……弁部材、６……チエ
ツクバルブ、７……バキユームタンク、８……エ
ンジン回転数センサ、９……コンピユータ、１０
，１０ａ……ソレノイドバルブ、１１，１１ａ…
…バルブアクチユエータ、１２……スロツトルバ
ルブ、１３……吸気弁、１４……排気管、１５…
…ピストン、Ａ……長吸気通路、Ｂ……短吸気通
路。 FIG. 1 is an overall configuration diagram of an intake passage length variable device as a first embodiment of the present invention, and FIG. 2 is an overall configuration diagram of an intake passage length variable device for an internal combustion engine as a second embodiment of the invention. , FIG. 3 is an overall configuration diagram showing an application example of the second embodiment, and FIG. 4 is a characteristic diagram showing the relationship between volumetric efficiency and engine speed. DESCRIPTION OF SYMBOLS 1... Surge tank, 2... Combustion chamber, 3... Intake passage, 4... Intake subchamber, 4A... Partition member, 4
a, 4b...opening, 4c...intake subchamber entrance, 4
d...Intake subchamber outlet, 5...Switching valve, 5a, 5b
... Valve body piece, 5c, 5d ... Valve member, 6 ... Check valve, 7 ... Vacuum tank, 8 ... Engine rotation speed sensor, 9 ... Computer, 10
, 10a... solenoid valve, 11, 11a...
...Valve actuator, 12... Throttle valve, 13... Intake valve, 14... Exhaust pipe, 15...
...Piston, A...Long intake passage, B...Short intake passage.

Claims

[Scope of Claim for Utility Model Registration] (1) A surge tank is provided in the intake system of an internal combustion engine, and a surge tank is provided in the intake system between the surge tank and the combustion chamber of the internal combustion engine so that the intake passage branches off from the intake passage. An intake sub-chamber is provided, and a switching valve that cooperates with the intake sub-chamber to change an effective intake passage length is provided at an opening of the intake sub-chamber to the intake passage, and the switching valve is connected to the intake sub-chamber. An intake passage for an internal combustion engine, characterized in that the intake passage is configured to be switchable between a mode in which the opening of the intake passage is closed and a mode in which the intake passage is closed and intake air is allowed to flow through the intake sub-chamber. Variable length device. (2) A surge tank is provided in the intake system of the internal combustion engine, and an intake auxiliary chamber is provided in the middle of the intake passage between the surge tank and the combustion chamber of the internal combustion engine so as to branch from the intake passage, and A partition member is provided that divides the opening of the sub-intake chamber into the intake passage and forms a passage from one opening to the other opening via the sub-intake chamber, and cooperates with the sub-intake chamber. A switching valve for changing the effective intake passage length is provided in the opening, and the switching valve includes a pair of valve members that respectively open and close the opening portion of the intake subchamber divided into two by the partition member. , and the valve member provided on the intake inlet side of the valve member is configured to open and close only one opening portion of the intake sub-chamber, and the valve member is provided on the intake outlet side of the valve member. An intake passage length variable device for an internal combustion engine, characterized in that a valve member is configured to open and close the other opening of the intake sub-chamber and the intake passage.