JPS62175266U - - Google Patents

Description

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

第１〜３図は本考案の第１実施例を示すもので
、第１図はエンジンにおける燃焼室周辺を示すシ
リンダヘツドの縦断面図、第２図は該シリンダヘ
ツドの吸、排気ポートに沿つて切断した横断平面
図、第３図は燃料噴射弁の先端部を示す拡大断面
図である。また、第４図は第２実施例を示すもの
でシリンダヘツドの要部横断平面図である。 ４ｅ，４ｅ′…連通路、５，５′…燃焼室、６
_１ａ，６_１ａ′…第１吸気通路の燃焼室側開口部
、６_２ａ，６_２ａ′…第２吸気通路の燃焼室側開
口部、１０_１，１０_１′…下流側吸気弁（第１吸
気弁）、１０_２，１０_２′…上流側吸気弁（第２
吸気弁）、２３_１，２３_１′…第１吸気通路、２
３_２，２３_２′…第２吸気通路、２６，２６′…
燃料噴射弁、２６ａ…一方の噴口部（第１噴口部
）、２６ｂ…他方の噴口部（第２噴口部）。 Figures 1 to 3 show a first embodiment of the present invention. Figure 1 is a longitudinal sectional view of a cylinder head showing the vicinity of the combustion chamber in an engine, and Figure 2 is a longitudinal cross-sectional view of the cylinder head along the intake and exhaust ports of the cylinder head. FIG. 3 is an enlarged sectional view showing the tip of the fuel injection valve. FIG. 4 shows a second embodiment, and is a cross-sectional plan view of the main part of the cylinder head. 4e, 4e'...Communication path, 5,5'...Combustion chamber, 6
_1a , 6 _1a '...opening on the combustion chamber side of the first intake passage, 6 _2a , 6 _2a '...opening on the combustion chamber side of the second intake passage, ₁₀₁ , ₁₀₁ '...downstream intake valve (first intake valve), 10 ₂ , 10 ₂ '...upstream intake valve (second
intake valve), 23 ₁ , 23 ₁ ′...first intake passage, 2
3 ₂ , 23 ₂ ′...second intake passage, 26, 26'...
Fuel injection valves, 26a...one nozzle part (first nozzle part), 26b...the other nozzle part (second nozzle part).

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ２つの吸気弁が吸気流方向に略直列に配置され
ていると共に、吸気流方向に対し下流側の吸気弁
により開閉される第１吸気通路と、上流側の吸気
弁により開閉される第２吸気通路とを有し、且つ
第２吸気通路にエンジンの低負荷時に閉じる制御
弁が設けられたエンジンにおいて、上記第１吸気
通路と第２吸気通路の制御弁下流部とを連通させ
る連通路を設けると共に、２つの噴口部を有する
燃料噴射弁を上記第１吸気通路側に配置し、該噴
射弁における一方の噴口部の燃料噴射方向を上記
第１吸気通路の燃焼室への開口部方向に、他方の
噴口部の燃料噴射方向を上記連通路を介して第２
吸気通路の燃焼室への開口部方向に夫々設定した
ことを特徴とするエンジンの吸気装置。 Two intake valves are arranged substantially in series in the intake flow direction, and a first intake passage is opened and closed by an intake valve on the downstream side with respect to the intake flow direction, and a second intake passage is opened and closed by an intake valve on the upstream side with respect to the intake flow direction. and a second intake passage is provided with a control valve that closes when the load of the engine is low, a communication passage is provided that communicates the first intake passage with a downstream part of the control valve of the second intake passage. At the same time, a fuel injection valve having two nozzle ports is disposed on the first intake passage side, and the fuel injection direction of one of the nozzle ports in the injection valve is directed toward the opening of the first intake passage to the combustion chamber, The fuel injection direction of the other nozzle port is changed to the second direction through the communication path.
An intake system for an engine, characterized in that each intake passage is set in the direction of an opening toward a combustion chamber.