A supercharging device is configured to increase an amount of intake air of an engine of a vehicle, where the supercharging device includes a chamber formed to be open in an ejecting direction of a compressor outside an ejecting portion of a compressor housing of the compressor, and an air adding device configured to supply air not compressed by the compressor to the chamber.

Methods and systems are provided for boosted engines. In one example, a method for a boosted engine method may include storing compressed air in a reservoir for supply to the engine during increased engine load operating conditions and replenishing the air in response to pressure dropping below a nominal threshold; and increasing the pressure beyond the nominal threshold in response to increased temperature of the stored air in the reservoir even when operating conditions include decreased engine load, and purging the increased temperature stored air to bring pressure back down toward the nominal threshold. In one example, increasing pressure to the reservoir may include supplying compressed air from an air suspension system. In one example, increasing pressure to the reservoir may include supplying compressed air from an air compressor separate from an engine turbocharger compressor. In one example, the method may include, in response to a vehicle operator tip-in during the increasing of the pressure beyond the nominal threshold, simultaneously supplying stored compressed air to the engine while replenishing the air.

Methods and systems that monitor an actuator state of wear. One or more observations are made as to one or more extremum positions of the actuator to determine a reference extremum position when the actuator is not worn. As the actuator becomes worn, the difference between a present extremum position and the reference is used to monitor actuator wear. Actuator wear may be observed to identify or predict a need for maintenance or replacement, and/or may be used in determining health impacts of control system solutions.

When first switching of switching from a first purge of supplying evaporated fuel gas to an intake pipe through a first purge passage to a second purge of supplying the evaporated fuel gas to the intake pipe through a second purge passage occurs and then second switching of switching from the second purge to the first purge occurs, a purge concentration-related value is corrected to a value closer to a first stored value that is the purge concentration-related value immediately before the first switching than to a second stored value that is the purge concentration-related value immediately before the second switching.

An exhaust gas recirculation (EGR) passage is connected with an intake passage (a bypass passage bypassing a supercharger) of an engine. The EGR passage includes, in a position close to a connection port to the intake passage, an expanding portion in which a passage cross-sectional area expands and which lowers a flow speed of EGR gas so as to reduce an uneven flow, in the connection port, of the EGR gas flowing into the intake passage.

A centrifugal compressor includes: an impeller; a compressor inlet tube configured to guide air to the impeller; a scroll flow passage disposed on a radially outer side of the impeller; a bypass flow passage branching from the scroll flow passage via a branch port, the bypass flow passage connecting to the compressor inlet tube not via the impeller; and a bypass valve capable of opening and closing a valve port disposed in the bypass flow passage. The branch port has a non-circular shape when viewed along a normal N1 of the branch port passing through a center of the branch port.

A centrifugal compressor includes an impeller, a compressor inlet pipe for guiding air to the impeller, a scroll passage disposed on an outer peripheral side of the impeller, and a bypass passage connecting the compressor inlet pipe and the scroll passage and bypassing the impeller. In a cross-section perpendicular to an axis of the compressor inlet pipe, when A1 is a connection portion on a downstream side in a rotational direction of the impeller of connection portions between an inner wall surface of the compressor inlet pipe and an inner wall surface of the bypass passage, C is a virtual circle constituting the inner wall surface of the compressor inlet pipe, and L1 is a tangent line of the virtual circle C at the connection portion A1, the inner wall surface of the bypass passage is formed from the connection portion A1 along the tangent line L1.

A supercharger for a vehicle includes: a first compression part to compress outside air; a second compression part to compress the outside air independently of the first compression part; a first valve module to selectively switch a path of the air compressed by the first compression part to a power source of the vehicle or the second compression part and to selectively guide or shut off the air compressed by the second compression part to the power source; and a second valve module to selectively shut off a flow of the air compressed by the first compression part into the second compression part or a flow of the outside air into the second compression part.

A supercharger for a vehicle includes: a first compression part to compress outside air; a second compression part to compress the outside air independently of the first compression part; a first valve module to selectively switch a path of the air compressed by the first compression part to a power source of the vehicle or the second compression part and to selectively guide or shut off the air compressed by the second compression part to the power source; and a second valve module to selectively shut off a flow of the air compressed by the first compression part into the second compression part or a flow of the outside air into the second compression part.

An apparatus for controlling a hybrid vehicle is provided. The apparatus includes an engine generating power by combustion of fuel, a driving motor assisting power of the engine and selectively operated as a power generator to generate electric energy and a clutch disposed between the engine and the driving motor. A battery supplies electric energy to the driving motor and charges the electric energy generated in the driving motor. A plurality of electric superchargers are installed in a plurality of intake lines, in which outside air supplied to combustion chambers of the engine flows, respectively and a controller variably adjusts an operating point of the engine.