Kabushiki Kaisha Toyota Jidoshokki

Makio Oshita

Toshihiro Yamamichi

Satoshi Umemura

Kiyoshi Uetsuji

Yutaka Fujiki

Yoshihiro Maeda

An electric supercharger that can reduce vibration amplitude in an end of a shaft due to rotational vibration is provided. An electric superchargercomprises: an impellerfor supercharging a fluid by rotation; an impeller chamberfor accommodating the impeller; a motorfor driving the impellerto rotate; and a motor chamberfor accommodating the motor. An openingis provided between the impeller chamberand the motor chamberwherein the fluid is able to pass therethrough. Seal structuresare provided for separating the motor chamberfrom the exterior at portions other than the opening

Electric supercharger and supercharging system

An electric supercharger includes a housing, a rotary shaft rotatably supported in the housing via a rolling bearing, an impeller, and an electric motor. The electric motor including a cylindrical stator around which a coil is wound. The stator having a stator core and coil ends. The rolling bearing has an inner ring, an outer ring, and a rolling element. The housing has an oil supply portion. The oil supply portion has attached thereto an oil supply member. The oil supply member has a supply passage and an injection hole. The housing has therethrough oil supply holes communicating with the oil supply portion and disposed so as to overlap with the coil ends.

Electric supercharger

An electric supercharger includes an electric motor, a compressor wheel rotated by the electric motor, and a compressor housing. The compressor housing includes a first passage through which air is introduced, an introducing port connecting to an EGR device, a second passage through which at least one of air and EGR gas is flowed, a bypass passage through which at least one of air and EGR gas is flowed, and a bypass valve to open and close the bypass passage. When the bypass valve is opened, air introduced from the first passage and EGR gas introduced from the introducing port are flowed through the bypass passage to the internal combustion engine. When the bypass valve is closed, air introduced from the first passage and EGR gas introduced from the introducing port are compressed in the compressor wheel and flowed through the second passage to the internal combustion engine.

A control system for an internal combustion engine includes an electric supercharger that includes a compressor wheel that is configured to be rotated by an electric motor. The control system includes a bypass passage, a bypass valve, and an exhaust gas recirculation passage. The control device is configured to control the electric supercharger and the bypass valve based on an operation condition of the internal combustion engine. The control device is configured to cause a stepping operation of the electric supercharger in which acceleration and stopping of the compressor wheel are repeated within a predetermined cleaning time after operation of the internal combustion engine is stopped.

Control system for internal combustion engine

There is provided an electric supercharger having a compressor including a compressor impeller, a motor housing, an electric motor rotationally driving the compressor, and a first bearing and a second bearing provided to support a shaft and a rotor in the motor housing. The first bearing is located on the compressor side of the rotor and the second bearing is located on the other side of the rotor. The motor housing includes a thermal conductive passage through which heat generated by a coil wound around a stator is transmitted to the first and second bearings. The thermal conductive passage between the coil and the first bearing is formed with a reduced thickness portion in such a way that thickness of the thermal conductive passage is reduced in a direction that is perpendicular to a direction in which the heat is transmitted through the thermal conductive passage.

A sensorless electric motor control device is provided that completes a phase detection of a rotor before an activation signal is received, so as to shorten a time period from when the activation signal is received to when the rotor reaches a target number of rotations. The control device for a sensorless electric motorincludes an inverterthat drives the electric motorand a first processorthat serves as a phase detection unit that causes the inverterto perform a phase detection before the inverterreceives an activation signal that activates the electric motor, wherein the phase detection aligns a magnetic pole of a rotor of the electric motorwith a predetermined position with respect to a stator.

Growing community of inventors

Aichi-ken, Japan

Makio Oshita