A method for operation of an engine. The method includes during a first operating condition, permitting intake airflow through an intake air-supply turbine positioned upstream of a cylinder to drive a generator, the generator coupled to an energy storage device, and inhibiting intake airflow through a motor-driven compressor arranged in parallel flow arrangement with the intake air-supply turbine, the motor driven compressor coupled to a motor coupled to the energy storage device. The method further includes during a second operating condition, permitting intake airflow through the motor-driven compressor while the motor-driven compressor receives rotation input from the motor, and inhibiting intake airflow through the intake air-supply turbine.

A turbocharger system is provided. The turbocharger system includes a turbine positioned downstream of a combustion chamber and a turbine bypass conduit in fluidic communication with a turbine inlet and a turbine outlet. The turbocharger system further includes a wastegate positioned in the turbine bypass conduit, a wastegate actuator coupled to the wastegate adjusting a position of the wastegate, and an air-cooled solenoid valve coupled to wastegate actuator adjusting a position of the wastegate actuator, the air-cooled solenoid valve receiving cooling airflow from an intake conduit positioned upstream of a compressor mechanically coupled to the turbine.

A method of removing impurities from EGR by air blowing may include performing an air-blowing mode in which, when a current intake system pressure detected by a controller exceeds a target intake system pressure in an intake system, in which a mixture is supplied to an engine, a portion of the mixture, serving as compressed air, flows into an EGR path, through which a portion of exhaust, serving as EGR gas and flowing in the intake system and an exhaust system connected to the intake system, is supplied to the engine.

Various methods and systems are provided for generating exhaust energy and converting exhaust energy to electrical energy while an engine is not running. In one example, a system for an engine comprises: a first turbocharger including a first compressor driven by a first turbine, the first turbine disposed in an exhaust of the engine; a fuel burner fluidly coupled to the exhaust upstream of the first turbine; a generator coupled to one of the first turbine or an auxiliary, second turbine fluidly coupled to the exhaust downstream of the fuel burner; and one or more bypass valves configured to adjust a flow of air that bypasses the engine and is delivered to the fuel burner.

Methods and systems are provided for adjusting and diagnosing one or more canister purge valves in a fuel vapor recovery system. In one example, a method may include adjusting one or more canister purge valves in a passage coupled to a fuel vapor canister of the fuel vapor recovery system to allow flow between an intake passage and an intake manifold of the engine based on engine operating conditions. Further, the method may include indicating the one or more canister purge valves are degraded and based on a change in air-fuel ratio after adjusting the one or more canister purge valves.

Methods and systems are provided for purging a fuel vapor canister. In one example, a method may include during boosted engine operating conditions, utilizing regulated compressed air from an engine intake to purge fuel vapors stored in the fuel vapor canister. Further, during non-boosted condition, regulated air from the intake may be utilized to purge the fuel vapor canister. The purged fuel vapors and intake air may be delivered to upstream of a compressor when operating with boost, or to an intake manifold when operating without boost.

Methods and systems are provided for purging a fuel vapor canister. In one example, a method may include during boosted engine operating conditions, utilizing regulated compressed air from an engine intake to purge fuel vapors stored in the fuel vapor canister. Further, during non-boosted condition, regulated air from the intake may be utilized to purge the fuel vapor canister. The purged fuel vapors and intake air may be delivered to upstream of a compressor when operating with boost, or to an intake manifold when operating without boost.

A supercharger exhaust bypass system, comprises a supercharger comprising an inlet and outlet, a bypass valve connected to the supercharger outlet, a first intercooler connected to receive compressed air from the outlet of the supercharger and connected to cool and expel air, a second intercooler comprising an envelope inlet, an exhaust inlet, an exhaust outlet, an exhaust passage between the exhaust inlet and the exhaust outlet, and an envelope connected to the envelope inlet and surrounding the exhaust passage, an engine system connected to receive expelled air from the first intercooler and further connected to output exhaust to the exhaust inlet of the second intercooler, and a bypass conduit connected to the bypass valve and connected to the envelope inlet.

A drive train arrangement includes an internal combustion engine with at least one cylinder having a combustion gas inlet, and an exhaust outlet; an exhaust gas pump having a pump inlet coupled to the exhaust outlet, and a pump outlet coupled to a vehicle air tank and to the combustion gas inlet. A first flow control arrangement controls fluid flow from the pump outlet to the combustion gas inlet, and to the vehicle air tank. Control circuitry controls operation of the first flow control arrangement. The control circuitry is configured to: acquire a first indication of an air pressure in the vehicle air tank; and control, in response to the air pressure in the vehicle air tank being below a first threshold, the first flow control arrangement to allow fluid flow from the pump outlet to the vehicle air tank.

A pneumatically actuated vacuum pump is disclosed, and includes a body defining a converging motive section, a diverging discharge section, at least one suction port, and a Venturi gap. The Venturi gap is located between an outlet end of the converging motive section and an inlet end of the diverging discharge section. The pneumatically actuated vacuum pump also includes a first check valve fluidly connected to the Venturi gap and the suction port. The pneumatically actuated vacuum pump further includes at least one second gap located in the diverging discharge section of the body downstream of the Venturi gap. A second check valve is fluidly connected to the second gap.