초록 ▼

An internal combustion engine equipped with at least one exhaust gas turbocharger whose compressor is connected by way of a charging pressure line to a suction manifold of the engine and whose turbine is inserted into an exhaust gas line coming from an exhaust gas manifold. A controllable blow-off v

An internal combustion engine equipped with at least one exhaust gas turbocharger whose compressor is connected by way of a charging pressure line to a suction manifold of the engine and whose turbine is inserted into an exhaust gas line coming from an exhaust gas manifold. A controllable blow-off valve (waste gate) is installed into a by-pass line coming from the exhaust gas line and by-passing the turbine while the compressor is adapted to be short-circuited by way of a vent valve. During the transition of the internal combustion engine into the coasting operation, the blow-off valve is activated into the closed condition for at least a limited time span. A loss of exhaust gas energy during a shifting operation is avoided thereby so that the internal combustion engine accelerates more rapidly after termination of the shifting operation.

대표청구항 ▼

An internal combustion engine, comprising at least one turbocharger including a turbine and a compressor whose compressor is operatively connected by way of a charging pressure line with an intake manifold of the internal combustion engine and whose turbine is operatively connected into an exhaust g

An internal combustion engine, comprising at least one turbocharger including a turbine and a compressor whose compressor is operatively connected by way of a charging pressure line with an intake manifold of the internal combustion engine and whose turbine is operatively connected into an exhaust gas line coming from an engine exhaust gas manifold, a by-pass line coming from the exhaust gas manifold and by-passing the turbine, a controllable blow-off valve means in said by-pass line, vent valve means for short-circuiting the compressor, engine throttle valve means for controlling the supply of fuel and air to the engine intake manifold, engine speed detecting means for detecting the engine speed, and blow-off valve control means for controlling the blow-off valve means such that the blow-off valve means is moved to a closed position for a limited time interval during transitional operation of the engine with the engine throttle valve means closed and the speed of the engine above a predetermined value, whereby the charging pressure of the turbocharger is maintained substantially unchanged during vehicle shifting operations.