JPH024930U

JPH024930U -

Info

Publication number: JPH024930U
Application number: JP8349788U
Authority: JP
Priority date: 1988-06-24
Filing date: 1988-06-24
Publication date: 1990-01-12
Anticipated expiration: 2003-06-24
Also published as: JPH0540272Y2

Description

[Brief explanation of drawings]

図面は本考案の実施例を例示し、第１図は全体
概略構成図、第２図はエンジンの要部平面図、第
３図はプライマリ排気ターボ過給機のタービンを
コンプレツサ側からみた側面図、第４図はセカン
ダリ排気ターボ過給機のタービンをその吐出口側
からみた側面図、第５図はコントロールユニツト
の作動制御を示すフローチヤート図、第６図は低
回転領域を示す説明図である。２３……排気集合部、２５……排気マニホール
ド、３１……プライマリ排気ターボ過給機、３２
……セカンダリ排気ターボ過給機、３１ａ……タ
ービン、３２ａ……タービン。 The drawings illustrate an embodiment of the present invention; Fig. 1 is a general schematic diagram, Fig. 2 is a plan view of the main parts of the engine, and Fig. 3 is a side view of the turbine of the primary exhaust turbocharger as seen from the compressor side. , Fig. 4 is a side view of the turbine of the secondary exhaust turbocharger seen from its discharge port side, Fig. 5 is a flowchart showing the operation control of the control unit, and Fig. 6 is an explanatory diagram showing the low rotation region. be. 23...Exhaust collection part, 25...Exhaust manifold, 31...Primary exhaust turbo supercharger, 32
...Secondary exhaust turbo supercharger, 31a...Turbine, 32a...Turbine.

Claims

[Scope of utility model registration request]

Equipped with a primary and secondary exhaust turbo supercharger that supercharges intake air using the energy of exhaust gas from the exhaust manifold, the primary exhaust turbo supercharger is always operated and the secondary exhaust turbo supercharger is stopped in a specific operating range. In the exhaust turbocharging device for an engine configured as above, the spiral direction of the scroll of the turbine in the direction of exhaust discharge is made to match between the primary exhaust turbocharger and the secondary exhaust turbocharger, and
The primary exhaust turbo supercharger and the secondary exhaust turbo supercharger are arranged with the discharge ports of the turbines facing each other, and the exhaust gas from each turbine discharge port is collected between the two exhaust turbo superchargers. In addition, the direction of the exhaust flow from the exhaust manifold and the exhaust flow in the turbine scroll around the axis of the exhaust turbocharger is the same in the primary exhaust turbocharger, and in the secondary exhaust turbocharger. An exhaust turbo supercharging device for an engine is characterized in that each exhaust turbo supercharger is connected to an exhaust manifold in opposite directions.