An apparatus for improving efficiency of a turbocharger engine including a turbocharger configured of a turbine rotated by discharge force of exhaust gas transferred from an exhaust manifold, and a compressor rotated coaxially with the turbine to compress intake air applied to an engine is provided. The turbine includes a turbine housing and a turbine wheel. The apparatus includes an auxiliary wheel that is formed at one side of the turbine wheel and an air compressor rotated by being connected to a crankshaft of the engine to generate compressed air. A valve connects between the air compressor and an air tank to transfer the compressed air to the air tank, and transfers, when charging of the air tank is completed, the compressed air to the auxiliary wheel side to increase torque of the turbine wheel.

A valve arrangement for supplying air to a combustion chamber of an internal combustion engine includes a first valve, the first valve including a first valve head, a first valve stem assembly and an internal cavity, which is at least partly located in the first valve stem assembly, and a second valve partly arranged within the internal cavity of the first valve, the second valve including a second valve head and a second valve stem assembly, and being movable within the internal cavity between an upper, closed position and a lower, open position, wherein a junction seal extends over a junction between the first valve stem assembly and the second valve stem assembly when the second valve is in the closed position. A leakage preventing arrangement is arranged to hinder leakage of liquid from the outside of the junction seal from reaching in between the first valve stem assembly and the second salve stem assembly.

A valve arrangement for supplying air to a combustion chamber of an internal combustion engine includes a first valve, the first valve including a first valve head, a first valve stem assembly and an internal cavity, which is at least partly located in the first valve stem assembly, and a second valve partly arranged within the internal cavity of the first valve, the second valve including a second valve head and a second valve stem assembly, and being movable within the internal cavity between an upper, closed position and a lower, open position, wherein a junction seal extends over a junction between the first valve stem assembly and the second valve stem assembly when the second valve is in the closed position. A leakage preventing arrangement is arranged to hinder leakage of liquid from the outside of the junction seal from reaching in between the first valve stem assembly and the second salve stem assembly.

A hybrid electric vehicle includes a combustion engine, electric machine, turbocharger, and turbo lag reduction assembly that includes an auxiliary compressor and pressure tank, which are coupled to a clutch driven by a driveshaft powered by vehicle wheel rotation. A controller engages the clutch in response to a braking signal, until the auxiliary compressor recharges the pressure tank. The controller also disengages the clutch in response to one of termination of the braking signal and the pressure tank being recharged with compressed air. Additionally, the controller responds to an engine torque demand signal and discharges compressed air from the pressure tank to an intake manifold of the engine. Further, the controller may discharge a volume of compressed air from the pressure tank to the intake manifold of the engine, until a turbo charge limit signal is received that indicates the turbocharger reached an operating speed.

A reciprocating, internal combustion engine comprises a turbine connected to the exhaust port of a cylinder. The turbine receives exhaust gas from the cylinder and a power capture means transfers the power generated by the turbine to at least one of power storage device, a turbocharger, a compressor, and vehicle locomotion.

Engine systems have an air induction system, a turbocharger in fluid communication with an intake manifold, an evacuator defining a Venturi gap with a suction port in fluid communication therewith, a relief valve enclosing a piston and defining an inlet and an outlet in selective fluid communication with one another, and a storage tank of high pressure air in fluid communication with the evacuator. The relief valve has a valve element connected to the piston, and the piston divides the housing into a pressurized chamber in fluid communication with the suction port of the evacuator and a bypass portion in fluid communication with the inlet, which is in fluid communication with the compressed air from the turbocharger, and the outlet, which is in fluid communication with the air induction system or atmosphere. A discharge cone of the evacuator is in fluid communication with atmosphere or the air induction system.

Engine systems have an air induction system, a turbocharger in fluid communication with an intake manifold, an evacuator defining a Venturi gap with a suction port in fluid communication therewith, a relief valve enclosing a piston and defining an inlet and an outlet in selective fluid communication with one another, and a storage tank of high pressure air in fluid communication with the evacuator. The relief valve has a valve element connected to the piston, and the piston divides the housing into a pressurized chamber in fluid communication with the suction port of the evacuator and a bypass portion in fluid communication with the inlet, which is in fluid communication with the compressed air from the turbocharger, and the outlet, which is in fluid communication with the air induction system or atmosphere. A discharge cone of the evacuator is in fluid communication with atmosphere or the air induction system.

Methods and systems are provided for a boosted internal combustion engine. In one example, a system may include an intake system for supplying charge air, a compressor arranged in the intake system, a first shut-off element arranged in the intake system upstream of an impeller of the compressor, a bypass line that branches off from the intake system upstream of the first shut-off element and that rejoins the intake system upstream of the impeller, a second shut-off element arranged in the bypass line, a compressed air line that opens into the bypass line downstream of the second shut-off element, and a third shut-off element arranged in the compressed air line. A map width of the compressor may be increased by providing airflow to the impeller via the bypass line during low mass flow conditions, and impeller acceleration may be expedited by providing compressed air via the compressed air line.

A control system for an internal combustion engine (ICE) is provided including a control unit configured for operating an electrically controlled valve for supplying compressed air to at least one cylinder depending on an operational mode for the ICE. A method for controlling such an ICE (200), and a computer are also provided.

A control system for an internal combustion engine (ICE) is provided including a control unit configured for operating an electrically controlled valve for supplying compressed air to at least one cylinder depending on an operational mode for the ICE. A method for controlling such an ICE (200), and a computer are also provided.