F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
F02M 45/02 (2006.01) F01N 3/20 (2006.01) F02D 41/40 (2006.01) F02M 57/02 (2006.01) F02M 59/10 (2006.01) F02M 59/36 (2006.01)
Patent
CA 2284680
Four-stroke diesel engine with unit injectors (6) and a catalytic converter (24) in the engine exhaust system (23) for catalytic reduction of nitrogen oxides in the exhaust. The unit injectors have pump pistons, each driven by an individual cam element (12, 13) with a cam curve (B, C), which has a first cam ridge (20) effecting injection of fuel during the ordinary injection phase of the engine, and a second cam ridge (21, 22) which achieves so-called post-injection in the engine combustion chamber during the exhaust phase of the engine, for supplying vaporized fuel to the catalytic converter.
Un moteur diesel à quatre temps comprend des injecteurs unitaires (6) et un convertisseur catalytique (24) disposé dans le système d'échappement (23) dudit moteur, de façon à assurer la réduction catalytique des oxydes d'azote dans ledit échappement. Les injecteurs comportent des pistons de pompe dont chacun est entraîné par un élément came distinct (12, 13) présentant une courbure (B, C). L'élément came comprend un premier bord (20), qui effectue l'injection de carburant durant la phase d'injection ordinaire du moteur, et un second bord (21, 22), qui effectue ce qu'on appelle la post-injection dans la chambre de combustion du moteur durant la phase d'échappement, de façon à fournir du carburant vaporisé au convertisseur catalytique.
Larsson Bengt
Tengroth Stellan
Smart & Biggar
Volvo Lastvagnar Ab
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