A method of controlling a turbocharged engine system including customized and selective operation of a turbocharger bypass valve to modulate air pressure through an intake system of the engine to achieve certain desirable auditory feedback, which are deliberately generated through control of engine systems. Additionally, the method may include receiving a user input corresponding to one of a plurality of turbocharger modes. Further, the method may include, in response to receiving the user input, determining an intake air pressure of an intake manifold of the turbocharged engine system. Still further, the method may include comparing the intake air pressure of the intake manifold with a predetermined threshold. Even further, the method may include adjusting a position of a bypass valve based on the turbocharger mode corresponding to the user input and the intake air pressure in comparison to the predetermined threshold. Related apparatuses, systems, techniques and articles are also described.

An air intake and exhaust system for a marine engine having an intake manifold and an exhaust manifold includes an air compressor configured to compress ambient air into compressed air and a catalytic converter assembly configured to convert pollutants in an exhaust gas stream received from the exhaust manifold. The air compressor is configured to be fluidly coupled to the intake manifold of the engine for directing at least a first portion of the compressed air to the intake manifold of the engine. The air compressor is also selectively fluidly coupled to the catalytic converter assembly for selectively directing a second portion of the compressed air into the exhaust gas stream at a secondary air injection location at or upstream of the catalytic converter assembly.

A heat shield includes an outer jacket including a fluid inlet port and a fluid outlet port, and an inner jacket nested within the outer jacket and spaced apart therefrom to define a fluid passageway therebetween. The fluid passageway is in fluid communication with the fluid inlet port and the fluid outlet port for directing a cooling fluid from the fluid inlet port to the fluid outlet port through the fluid passageway. The inner jacket at least partially defines a main cavity configured to at least partially protect a turbocharger of the marine engine.

Provided is an engine system including: a bypass pipe (bypass flow passage) connecting an upstream side and a downstream side of the turbine on an exhaust flow passage; a bypass valve configured to open and close the bypass flow passage; and a catalytic activation controller configured to control the bypass valve and a compression ratio of a combustion chamber.

A control device for an internal-combustion engine, includes: an ejector including an exhaust port coupled to an intake passage upstream of a compressor, an intake port coupled to a recirculation passage recirculating intake air from the intake passage downstream of the compressor to the intake passage upstream of the compressor, and a suction port coupled to a first branch passage; a first pressure acquirer obtaining a first pressure that is a pressure upstream of the compressor in the intake passage; a second pressure acquirer obtaining a second pressure that is a pressure downstream of the compressor in the intake passage; and an ejector negative pressure estimator configured to estimate an ejector negative pressure based on an opening period of the purge valve and the second pressure.

A heat shield includes an outer jacket including a fluid inlet port and a fluid outlet port, and an inner jacket nested within the outer jacket and spaced apart therefrom to define a fluid passageway therebetween. The fluid passageway is in fluid communication with the fluid inlet port and the fluid outlet port for directing a cooling fluid from the fluid inlet port to the fluid outlet port through the fluid passageway. The inner jacket at least partially defines a main cavity configured to at least partially protect a turbocharger of the marine engine.

A combustion engine for a motor vehicle includes an exhaust gas tract through which exhaust gas from a combustion chamber of the combustion engine can flow. An exhaust gas turbocharger has a turbine which is arranged in the exhaust gas tract and which has a turbine housing and a turbine wheel at least partially received in the turbine housing and driveable by the exhaust gas. Via a secondary air channel, which opens out into the exhaust gas tract, secondary air flowing through the secondary air channel can be introduced into the exhaust gas flowing through the exhaust gas tract. The secondary air channel opens out inside the turbine housing into the exhaust gas tract.

A device for controlling the amount of fluid fed to the intake of a supercharged internal-combustion engine includes at least one turbocharger with a compression stage including at least one compressor with an intake for the fluid to be compressed, an expansion stage with at least one turbine having at least one exhaust gas inlet and expanded exhaust gas outlet, a transfer line for carrying the compressed fluid from the compressor outlet to the at least one turbine inlet with throttling means for controlling the compressed fluid transfer to the turbine, and an exhaust gas recirculation line between exhaust gas outlet of turbine and intake of compressor.

A method, used with an internal combustion engine, of providing fresh air for regeneration of an exhaust aftertreatment device. An air intake diversion line is installed from a point between the throttle and the compressor to a point upstream of the exhaust aftertreatment device. A valve on this diversion line is normally closed. If the engine temperature is above a certain threshold and if the engine is in a high load deceleration state, the valve is opened, which diverts fresh air to the exhaust aftertreatment device. The valve is then closed after the pressure in the intake line is relieved.

A method, used with an internal combustion engine, of providing fresh air for regeneration of an exhaust aftertreatment device. An air intake diversion line is installed from a point between the throttle and the compressor to a point upstream of the exhaust aftertreatment device. A valve on this diversion line is normally closed. If the engine temperature is above a certain threshold and if the engine is in a high load deceleration state, the valve is opened, which diverts fresh air to the exhaust aftertreatment device. The valve is then closed after the pressure in the intake line is relieved.