JPS6240224U

JPS6240224U -

Info

Publication number: JPS6240224U
Application number: JP12993385U
Authority: JP
Priority date: 1985-08-28
Filing date: 1985-08-28
Publication date: 1987-03-10

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の平面図、第２図は
各吸気弁の動作時期及びリフトと、燃料噴射弁の
噴射時期を示すグラフ。第３図は第３の吸気弁の
開弁時期とリーン限界との関係を示すグラフ、第
４図は第３の吸気弁の閉弁時期と軸トルクとの関
係を示すグラフである。１…第１吸気ポート、２…第１吸気弁、３…燃
焼室、４…第２吸気ポート、５…第２吸気弁、６
…吸気制御弁、７…第３吸気ポート、８…第３吸
気弁、９…燃料噴射弁、１１…点火栓、１２…マ
スキング、１５…排気ポート、１６…ＥＧＲポー
ト、１９…ＥＣＵ。 FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a graph showing the operating timing and lift of each intake valve and the injection timing of the fuel injection valve. FIG. 3 is a graph showing the relationship between the opening timing of the third intake valve and the lean limit, and FIG. 4 is a graph showing the relationship between the closing timing of the third intake valve and the shaft torque. 1... First intake port, 2... First intake valve, 3... Combustion chamber, 4... Second intake port, 5... Second intake valve, 6
...Intake control valve, 7...Third intake port, 8...Third intake valve, 9...Fuel injection valve, 11...Ignition plug, 12...Masking, 15...Exhaust port, 16...EGR port, 19...ECU.

Claims

[Scope of Claim for Utility Model Registration] A first intake port that is always open to generate a swirl in the intake air supplied into the combustion chamber, and an intake control valve that opens only in the high-load, high-speed operating range of the engine; a second intake port that supplies straight intake air to the engine; and a third intake port located between the first and second intake ports and provided with a fuel injection valve;
These first, second and third intake ports are
, a dual intake valve engine in which the third intake valve is connected to a combustion chamber through a second and third intake valve, and the opening timing of the third intake valve is in the second half of the intake stroke, the third intake port is connected to the combustion chamber, A dual intake valve engine characterized in that the swirl port generates a swirl in the same direction as the swirl of the first intake port.