Turbocharger for internal combustion engines

Patent · Tue Sep 13 00:00:00 EDT 1988

OSTI ID:6529199

Kawamura, H

This patent describes a turbocharger for an internal combustion engine having engine cylinders, comprising: a turbine drivable by the exhaust energy of the internal combustion engine and having an impeller; an air compressor coupled by a shaft to the impeller for charging air into the engine cylinders in response to rotation of the shaft; a motor-generator having a rotor with a substantially I-shaped cross section mounted on the shaft, and stator coils disposed around the rotor. The rotor having an axial length longer than the diameter of the rotor, a magnetic path in the direction of the diameter of the rotor, dummy fillers which fill a part other than the magnetic path of the rotor to define a circular cross-section with the rotor, the magnetic path being fixedly secured to the dummy fillers, and an axially elongate, ring-shaped, rare-earth metal magnet constructed as a portion of the shaft and having a magnetic reluctance in a first direction normal to an axis of the shaft smaller than a magnetic reluctance in a second direction normal to the first direction and to the axis of the shaft, and an outer periphery of which is wound with carbon fibers; disks made of a metal of high tensile strength for holding the opposite ends of the magnet, respectively; and control means for operating the motor-generator as a motor under first operating conditions of the internal combustion engine, and as a generator under second operating conditions of the internal combustion engine, and means for supplying the stator coils with armature current leading a no-lead induced electromotive force by 90.

• Assignee: Isuzu Motors Ltd., Tokyo
• Patent Number(s): US 4769993
• OSTI ID: 6529199
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COMPRESSORS
CYLINDERS
DESIGN
ELECTRIC GENERATORS
ELECTRIC MOTORS
ELECTROMOTIVE FORCE
ENGINES
EXHAUST GASES
FINS
FLUID FLOW
FLUIDS
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MOTORS
STATORS
SUPERCHARGERS
TURBOCHARGERS
WASTES