March 13, 2018 Volume 14 Issue 10

Designfax weekly eMagazine

Subscribe Today!
image of Designfax newsletter


View Archives


Manufacturing Center
Product Spotlight

Modern Applications News
Metalworking Ideas For
Today's Job Shops

Tooling and Production
Strategies for large
metalworking plants

First crankshaft integrated starter-generator system for 48-V hybrid vehicles

The demand for 48-V hybrid vehicles, which offer excellent fuel efficiency at relatively affordable costs, is expected to increase, especially in Europe.

Mitsubishi Electric Corporation has begun mass-producing the auto industry's first crankshaft-mounted integrated starter-generator (ISG) system for 48-V hybrid vehicles, which will be mounted in future Mercedes-Benz vehicles.

Mitsubishi crankshaft ISG system for 48-V hybrid.



Mitsubishi Electric developed its ISG system -- a crankshaft direct-driven system for idling-stop-start, energy recovery, and torque assist -- to achieve higher output power and better fuel efficiency in 48-V hybrid vehicles. Mitsubishi Electric says it will continue developing increasingly smaller, lighter-weight, and higher-power ISG systems to increase fuel efficiency and reduce CO2 emissions.

System features

  1. Crankshaft-mounted motor realizes excellent fuel efficiency.
    • Compared to belt-driven starter-generators, the crankshaft-mounted motor produces higher output power and generates more power, which contributes to better fuel efficiency.
  2. Thin-profile, high-power motor for more flexible installations.
    • Mitsubishi Electric's original coil winding technology realizes a high-density configuration for thick coils required in a 48-V high-current motor.
    • Thin-profile, higher-power motors adapt flexibly to various vehicle layouts.
  3. Compact, highly reliable inverter.
    • Newly developed transfer-molded power module for 48-V systems reduces heat resistance and enhances durability.
    • Optimally designed cooling unit enhances cooling performance to realize a compact, highly reliable inverter.

Belt-driven and engine crankshaft direct-driven systems

  1. Belt-driven system: Using a belt to transfer power from the motor to the engine can limit both maximum torque with abrupt force transmission and the motor's peak power output.
  2. Engine crankshaft direct-driven system: Connecting the motor directly to the engine crankshaft eliminates the limitations of the belt system and enhances both motor output power and power generation

Source: Mitsubishi Electric Corporation

Published March 2018

Rate this article

First crankshaft integrated starter-generator system for 48-V hybrid vehicles]

Very interesting, with information I can use
Interesting, with information I may use
Interesting, but not applicable to my operation
Not interesting or inaccurate

E-mail Address (required):


Type the number:

Copyright © 2018 by Nelson Publishing, Inc. All rights reserved. Reproduction Prohibited.
View our terms of use and privacy policy