JPS59148452U

JPS59148452U - Internal combustion engine exhaust system

Info

Publication number: JPS59148452U
Application number: JP4216983U
Authority: JP
Inventors: 下田　邦彦; 土佐　陽三; 原田　常雄
Original assignee: 三菱重工業株式会社
Priority date: 1983-03-25
Filing date: 1983-03-25
Publication date: 1984-10-04

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の排気ターボ過給機関の１シリンダ当り排
気弁を２個もつシリンダヘッド内排気通路を示す断面図
、第２図は第１図の■−■矢視断面図、第３図は第１図
の■−■矢視断面図、第４図は従来の排気ターボ過給機
関のシリンダ内圧力Ｐ２及び排気管内圧力Ｐ、の変化を
示す線図、第５図は本考案による１実施例の排気ターボ
過給機関の１シリンダ当り排気弁２個をもつシリンダヘ
ッド内排気通路を示す断面図、第６図は第５図の■−Ｖ
Ｉ矢視断面図、第７図は第５図の■−■矢視断面図、第
８図は第５図の■−■矢視断面図、第９図は本考案によ
るシリンダヘッド内排気通路の場合のシリンダ内圧力Ｐ
２及び排気管内圧力Ｐ、の変化を示す線図、第１０図は
排気エネルギ回収率ηｅｌηｅｏ及び燃料消費率ｂｅｌ
ｂｅｏの変化を示す線図、第１１図はシリンダヘッド内
排気通路の曲り半径Ｒに対する圧力損失係数この関係を
示す線図であ　　　・る。１４．２４・・・弁座、１５・・・排気通路、１６・・
・シリンダヘッド出口、３０・・・仕切り。１、叶　　＼に ′　　　　１　即、−１１１低速　　　１１１１１　　− １ −」＋」１１Figure 1 is a sectional view showing the exhaust passage in a cylinder head with two exhaust valves per cylinder in a conventional exhaust turbocharged engine, Figure 2 is a sectional view taken along the ■-■ arrow in Figure 1, and Figure 3. is a sectional view taken along the arrow ■-■ in Fig. 1, Fig. 4 is a line diagram showing changes in the cylinder internal pressure P2 and exhaust pipe internal pressure P of a conventional exhaust turbocharged engine, and Fig. 5 is a diagram showing changes in the cylinder pressure P2 and exhaust pipe internal pressure P of a conventional exhaust turbocharged engine. A sectional view showing the exhaust passage in the cylinder head having two exhaust valves per cylinder of the exhaust turbocharged engine of the embodiment, FIG. 6 is the same as ■-V in FIG.
7 is a sectional view taken along the ■-■ arrow in FIG. 5, FIG. 8 is a sectional view taken along the ■-■ arrow in FIG. 5, and FIG. 9 is an exhaust passage in the cylinder head according to the present invention. The cylinder pressure P in the case of
2 and the exhaust pipe internal pressure P, FIG. 10 shows the exhaust energy recovery rate ηelηeo and the fuel consumption rate bel.
FIG. 11 is a diagram showing the relationship between the curve radius R of the exhaust passage in the cylinder head and the pressure loss coefficient. 14.24...Valve seat, 15...Exhaust passage, 16...
・Cylinder head outlet, 30...partition. 1, Kano \ni' 1 Immediately, -11 1 Slow speed 11 111 - 1 -''+''11

Claims

[Scope of utility model registration request]

In an exhaust turbocharged internal combustion engine that has an even number of exhaust valves in the cylinder head for each cylinder, the cross-sectional area of the exhaust passage in the cylinder head from the valve seat of the exhaust valve to the outlet of the cylinder head is defined as the valve seat A partition wall formed with an area of 0.5 to 0.7 corresponding to the inner diameter of the partition wall, which joins the exhaust passages from the two exhaust valves, and forms a section in which the flow direction of the exhaust gas is the same on the upstream side of the joining part. An exhaust system for an internal combustion engine, characterized in that the exhaust system is provided substantially perpendicularly to the lower surface of a cylinder head.