Internal-combustion engine with an exhaust gas turbocharger
AssigneeDaimlerChrysler AG
InventorsErwin Schmidt, Marco Schade, Siegfried Sumser
Life of this patent
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Abstract
An internal-combustion engine with a turbocharger is suggested, in the case of which a limiting of the exhaust gas counterpressure is provided in the braking operating mode of the internal-combustion engine.
Claims21
An internal-combustion engine having an intake pipe, an exhaust pipe and an exhaust gas turbocharger, whose compressor is situated in the intake pipe and whose turbine, acting in the engine braking operation as a throttle raising the exhaust gas counterpressure, is situated in the exhaust pipe which, in a section of the exhaust pipe extending toward the turbine, is provided with a valve which can be acted upon by actuators, by way of which valve, as a function of operating parameters of the internal-combustion engine/exhaust gas turbocharger system, a bypass is to be opened which bypasses the turbine,
- wherein the valve is to be opened in the braking operation of the internal-combustion engine for limiting the exhaust gas counterpressure.
An internal-combustion engine comprising:
- an intake pipe,
- an exhaust pipe,
- an exhaust gas turbocharger including a compressor in the intake pipe and a turbine in the exhaust pipe,
- a bypass line connected to the exhaust pipe upstream of the turbine and extending in bypassing relation to the turbine,
- a bypass control valve operable to control flow of gas from the exhaust pipe through the bypass line, and
- a valve control assembly operable to open the bypass control valve during braking operation of the engine to thereby limit exhaust gas counterpressure upstream of the turbine.
Dependencies are inferred from the claim text.