Global Patent Index - EP 0990781 A2

EP 0990781 A2 2000-04-05 - Exhaust braking method for a supercharged engine

Title (en)

Exhaust braking method for a supercharged engine

Title (de)

Motorbremsverfahren für eine aufgeladene Brennkraftmaschine

Title (fr)

Méthode de frein moteur pour un moteur suralimenté

Publication

EP 0990781 A2 (DE)

Application

EP 99116963 A

Priority

DE 19844573 A

Abstract (en)

A method for controlling the engine braking in a turbocharged internal combustion engine has a hard braking mode and a soft braking mode. The geometry of the exhaust driven turbine is varied by adjustable vanes between a stalling setting and a full flow setting. For the soft braking mode the turbine geometry (4) is set between the stalling position and the point at which the engine fires while the hard braking mode is selected between the onset of engine firing and the full flow setting. The hard braking mode applies for the higher torque operation of the engine.

Abstract (de)

Bei einem Motorbremsverfahren für eine aufgeladene Brennkraftmaschine, die einen Abgasturbolader mit einer Turbine mit variabler Turbinengeometrie aufweist, wird die Turbinengeometrie zwischen einer den wirksamen Turbinenquerschnitt reduzierenden Staustellung und einer den wirksamen Turbinenquerschnitt öffnenden Öffnungsstellung verstellt. Um das Verhalten der Motorbremse mit einfachen Maßnahmen so zu beeinflussen, dass eine an unterschiedliche Situationen angepaßte Bremsung möglich ist, wird im Motorbremsbetrieb die variable Turbinengeometrie zwischen einer vorgebbaren harten Brems-Einstellung und einer vorgebbaren weichen Brems-Einstellung verstellt wird, wobei die harte Brems-Einstellung zwischen der Staustellung und einer der befeuerten Antriebsbetriebsweise zugeordneten Antriebs-Ausgangsstellung und die weiche Brems-Einstellung zwischen der Antriebs-Ausgangsstellung und der Öffnungsstellung liegt und wobei die harte Brems-Einstellung derart gewählt wird, dass die Motorbremsleistung höher ist als in der weichen Brems-Einstellung. <IMAGE>

IPC 1-7 (main, further and additional classification)

F02D 9/06

IPC 8 full level (invention and additional information)

F02D 9/06 (2006.01)

CPC (invention and additional information)

F02D 9/06 (2013.01)

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

DE 19844573 A1 20000330; EP 0990781 A2 20000405; EP 0990781 A3 20001108; EP 0990781 B1 20040331; US 6220032 B1 20010424

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