JPH0424642U

JPH0424642U -

Info

Publication number: JPH0424642U
Application number: JP6543290U
Authority: JP
Priority date: 1990-06-22
Filing date: 1990-06-22
Publication date: 1992-02-27

Description

[Brief explanation of the drawing]

第１図は第２図の−線に沿つてみた２サイ
クル機関の側面断面図、第２図は第１図のシリン
ダヘツドの底面図、第３図はピストンが下死点に
あるときの第２図の−線に沿つてみた断面図
、第４図は給排気弁の開弁時期および噴射時期を
示す線図、第５図は噴射量を示す線図、第６図は
低負荷運転時を示す図、第７図は高負荷運転時を
示す図、第８図は燃焼方法を説明するための図で
ある。５……主燃焼室、１０……副燃焼室、１１……
噴口、１２……点火栓、１３……第１燃料噴射弁
、１４……第２燃料噴射弁。 Figure 1 is a side sectional view of the two-stroke engine taken along the - line in Figure 2, Figure 2 is a bottom view of the cylinder head in Figure 1, and Figure 3 is a view of the engine when the piston is at bottom dead center. A cross-sectional view taken along the - line in Figure 2, Figure 4 is a diagram showing the opening timing of the supply and exhaust valves and injection timing, Figure 5 is a diagram showing the injection amount, and Figure 6 is a diagram showing the low-load operation. FIG. 7 is a diagram showing high load operation, and FIG. 8 is a diagram for explaining the combustion method. 5...Main combustion chamber, 10...Sub-combustion chamber, 11...
Nozzle port, 12... Spark plug, 13... First fuel injection valve, 14... Second fuel injection valve.

Claims

[Scope of utility model registration request]

A sub-combustion chamber is provided which communicates with the main combustion chamber through a nozzle, a first fuel injection valve and a spark plug are disposed within the sub-combustion chamber, a second fuel injection valve is disposed within the main combustion chamber, and the first fuel injection valve is disposed within the main combustion chamber. In a two-cycle gasoline injection engine with a sub-combustion chamber in which gasoline is injected from an injection valve and a second fuel injection valve, the volume of the sub-combustion chamber is set to 30% to 7% of the total combustion chamber volume.
When the engine is running at a low load, gasoline is injected into the auxiliary combustion chamber only from the first fuel injection valve, and when the engine is running at a high load, gasoline is injected from the first fuel injection valve into the auxiliary combustion chamber and at the same time, at the same time, when the engine is running at a high load. Gasoline is injected into the main combustion chamber from the second fuel injection valve, gasoline injection from the first fuel injection valve is started before the exhaust valve closes, and gasoline injection from the second fuel injection valve is started after the exhaust valve is almost closed. A two-stroke gasoline injection engine with an auxiliary combustion chamber that starts gasoline injection.