JPH021422U - - Google Patents

Description

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

第１図ａ，ｂ，ｃは本考案の一実施例を示し、
第１図ａは排気行程を示す断面図、第１図ｂは吸
気行程の前半を示す断面図、第１図ｃは吸気行程
の下死点付近を示す断面図、第２図はシリンダヘ
ツドの吸排気弁の近傍を示す断面図、第３図は第
１図ａ，ｂ，ｃの実施例における吸排気弁の開閉
状態を示すグラフ、第４図ａは可変バルブタイミ
ング機構の駆動部を示す斜視図、第４図ｂは駆動
部の断面図、第５図は第４図ａ，ｂの可変バルブ
タイミング機構を用いた場合における吸排気弁の
開閉状態を示すグラフ、第６図ａは可変バルブタ
イミング機構の他の例を示す側面図、第６図ｂは
第６図ａの可変バルブタイミング機構の断面図、
第７図ａは第６図ａ，ｂの可変バルブタイミング
機構を用いた場合における高負荷運転域の吸排気
弁の開閉タイミングを示すグラフ、第７図ｂは低
中負荷運転域の吸排気弁の開閉タイミングを示す
グラフである。 ２１…吸気弁、２３…排気弁、２５…燃料噴射
弁、２７…過給機。 Figures 1a, b, and c show an embodiment of the present invention,
Figure 1a is a sectional view showing the exhaust stroke, Figure 1b is a sectional view showing the first half of the intake stroke, Figure 1c is a sectional view showing the vicinity of the bottom dead center of the intake stroke, and Figure 2 is a sectional view of the cylinder head. 3 is a sectional view showing the vicinity of the intake and exhaust valves; FIG. 3 is a graph showing the opening and closing states of the intake and exhaust valves in the embodiments shown in FIGS. 1a, b, and c; FIG. A perspective view, FIG. 4b is a sectional view of the drive unit, FIG. 5 is a graph showing the opening and closing states of the intake and exhaust valves when using the variable valve timing mechanism shown in FIGS. 4a and b, and FIG. 6a is a variable valve timing mechanism. A side view showing another example of the valve timing mechanism, FIG. 6b is a sectional view of the variable valve timing mechanism shown in FIG. 6a,
Figure 7a is a graph showing the opening/closing timing of the intake and exhaust valves in the high load operating range when using the variable valve timing mechanism of Figures 6a and b, and Figure 7b is a graph showing the intake and exhaust valve opening and closing timings in the low and medium load operating range It is a graph showing the opening/closing timing of. 21...Intake valve, 23...Exhaust valve, 25...Fuel injection valve, 27...Supercharger.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 吸気上死点後９０°付近まで開弁可能な排気弁
と、吸気上死点前に開弁し、該排気弁が閉弁した
後閉弁する吸気弁と、上記排気弁の閉弁後であつ
て上記吸気弁が開弁している間に燃料噴射を行う
燃料噴射弁と、上記吸気弁と排気弁の開弁期間に
燃焼室内に空気を供給する過給機とを備えること
を特徴とする過給機付成層燃焼エンジン。 An exhaust valve that can open up to around 90 degrees after the intake top dead center, an intake valve that opens before the intake top dead center and closes after the exhaust valve closes, and an intake valve that opens before the intake top dead center and closes after the exhaust valve closes. The combustion engine is characterized by comprising a fuel injection valve that injects fuel while the intake valve is open, and a supercharger that supplies air into the combustion chamber while the intake valve and exhaust valve are open. Stratified combustion engine with supercharger.