Methods and systems are provided for improving transient performance in a boosted engine having staged air compression systems. An electric supercharger compressor is staged downstream of a turbocharger compressor in a bypass, airflow diverted from a main intake passage to the bypass via closure of a bypass valve. During selected conditions when the supercharger compressor is not being spun, the bypass valve may be closed to direct air to the engine after flowing through the supercharger in a stand-by mode, thereby enabling a transient increase in torque demand to be rapidly met.

Methods and systems are provided for diagnosing an actuator of a variable inlet compressor coupled in an electric turbocharger. During torque transitions, an electrical power consumption of an electric boost assist motor is observed and used to infer an actual compressor speed and pressure ratio across the compressor. By comparing the measured pressure ratio to a compressor map, it may be determined if the actuator is stuck open or stuck closed.

Methods and systems are provided for diagnosing an actuator of a variable inlet compressor coupled in an electric turbocharger. During torque transitions, an electrical power consumption of an electric boost assist motor is observed and used to infer an actual compressor speed and pressure ratio across the compressor. By comparing the measured pressure ratio to a compressor map, it may be determined if the actuator is stuck open or stuck closed.

An electric turbocharger includes an electric motor which rotationally drives a rotating blade, a motor housing which accommodates the electric motor therein, a controller which is disposed outside the motor housing and controls the driving of the electric motor, and a power supply mechanism which supplies a current from the controller to the electric motor through a through-hole communicating the inside and the outside of the motor housing, in which the power supply mechanism includes a rod which is hermetically sealed while being inserted through the through-hole, a connector which is connected to at least one end of the rod, and a busbar which is connected to the connector, and in which the connector absorbs a relative positional displacement of the rod with respect to the connector.

An electric turbocharger includes an electric motor which rotationally drives a rotating blade, a motor housing which accommodates the electric motor therein, a controller which is disposed outside the motor housing and controls the driving of the electric motor, and a power supply mechanism which supplies a current from the controller to the electric motor through a through-hole communicating the inside and the outside of the motor housing, in which the power supply mechanism includes a rod which is hermetically sealed while being inserted through the through-hole, a connector which is connected to at least one end of the rod, and a busbar which is connected to the connector, and in which the connector absorbs a relative positional displacement of the rod with respect to the connector.

A dual, dual-pass intercooler assembly for an intercooler supercharger system comprising an intercooler lid mountable to a supercharger housing; a pair of intercooler cores coupled mountable to and within at least one of the intercooler lid and the supercharger housing; wherein the pair of intercooler cores configured to receive and cool supercharger air upon a first pass through the pair of intercooler cores and receive and further cool the supercharger air upon a second pass through the pair of intercooler cores prior to receipt by an engine.

A dual, dual-pass intercooler assembly for an intercooler supercharger system comprising an intercooler lid mountable to a supercharger housing; a pair of intercooler cores coupled mountable to and within at least one of the intercooler lid and the supercharger housing; wherein the pair of intercooler cores configured to receive and cool supercharger air upon a first pass through the pair of intercooler cores and receive and further cool the supercharger air upon a second pass through the pair of intercooler cores prior to receipt by an engine.

A vehicle control system to accurately control a vehicle by estimating a position of an accelerator pedal. In a first phase of an operation of the accelerator pedal in which a depression of the accelerator pedal increases, a first predicted value of a position of the accelerator pedal is calculated by a first calculation procedure based on the position of the accelerator in the first phase. In a second phase in which the change amount of the position of the accelerator plateaus, a second predicted value of the position of the accelerator pedal is calculated by a second calculation procedure based on the position of the accelerator in the second phase. In a third phase in which the change amount of the position of the accelerator decreases, the second predicted value is employed as the predicted value of the position of the accelerator pedal.

A vehicle control system to accurately control a vehicle by estimating a position of an accelerator pedal. In a first phase of an operation of the accelerator pedal in which a depression of the accelerator pedal increases, a first predicted value of a position of the accelerator pedal is calculated by a first calculation procedure based on the position of the accelerator in the first phase. In a second phase in which the change amount of the position of the accelerator plateaus, a second predicted value of the position of the accelerator pedal is calculated by a second calculation procedure based on the position of the accelerator in the second phase. In a third phase in which the change amount of the position of the accelerator decreases, the second predicted value is employed as the predicted value of the position of the accelerator pedal.

A supercharger includes a magnetic flux switching motor and a wheel. The motor includes a rotor; a stator stores the rotor therein and includes stator projecting portions projecting inward in a radial direction from an internal circumferential portion toward the rotor; a field source provided in a field slot formed between the stator projecting portions to generate a magnetic field of a constant direction; an armature coil provided in an armature slot; and a controller applying a single-phase current to the armature coil and changing a direction of the applied single-phase current to change a direction of a magnetic field generated from the armature coil and rotate the rotor. The wheel is attached to the rotor, and rotates together with rotation of the rotor to compress the air.