EP 0608521 B1 19951227 - Engine brake for heavy goods vehicle 4 stroke engine
Title (en)
Engine brake for heavy goods vehicle 4 stroke engine
Title (de)
Motorbremse bei einer 4-Takt-Brennkraftmaschine eines Nutzfahrzeuges
Title (fr)
Frein moteur pour moteur 4 temps de véhicule utilitaire
Publication
Application
Priority
AT 10593 A 19930125
Abstract (en)
[origin: EP0608521A1] The invention relates to an engine brake in a 4-stroke internal combustion engine of a commercial vehicle in which, during braking, the engine's own injection pump acts as hydraulic sensing device for hydromechanical actuating devices, by means of which the exhaust valves of the internal combustion engine are for a limited period during the compression cycles kept open by a smaller amount than normal. The engine brake according to the invention is characterised in that the delivery elements (K1 - Kn) of the injection pump (EP) with their control grooves and edges (5, 6) can be set to such a position and each control pressure line (S1 - Sn) emerging from a switching element (U1 - Un) provided in an injection pressure line (L1 - Ln) is connected to the actuating device (2) of the exhaust valve (A1 - An) of that cylinder Z (1-n) which is staggered by at least one angular ignition interval within the given firing order, so that in braking, by making the greatest possible use of a delivery stroke on the injection pump side, the fuel delivered opens the actuated exhaust valve (A1 - An) prior to compression in the area of the bottom dead centre, keeps it open during the subsequent compression cycle almost to ignition tdc and then closes it. Such an engine brake can be achieved with relatively few components and is thereby cost-effective. <IMAGE>
IPC 1-7
IPC 8 full level
F01L 13/06 (2006.01); F02B 75/02 (2006.01)
CPC (source: EP)
F01L 13/06 (2013.01); F01L 13/065 (2013.01); F02B 2075/027 (2013.01)
Designated contracting state (EPC)
DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0608521 A1 19940803; EP 0608521 B1 19951227; DE 59301259 D1 19960208
DOCDB simple family (application)
EP 93119699 A 19931207; DE 59301259 T 19931207