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Products: Automotive Equipment

Environment & Economy - Concept

Moving forward with Environment & Economy


Making cars safer for the environment and more efficient.

As electric motors advance, exemplified by the electric and hybrid vehicles we see today, there are growing needs for more compact and efficient motors and inverters. While there likely won't be any change to the dominant position of the conventional engine, we will continue to actively strive for better fuel efficiency and improved comfort, as well as cars that are safe for both the environment and drivers.

Reducing fuel consumption

Alternators: Contributing to improved fuel consumption and comfort

The use of electricity in cars to both improve passenger comfort and to keep up with stricter regulations for fuel efficiency and emissions is on the rise in recent years. Since beginning production in 1946, our aim in continuing development has been to manufacture products that are more compact, lighter and have higher output. Our latest model alternator—the GX—has achieved 2.5 times more output per mass (A/kg) compared to the 4G alternator, which went into production in 1980.

Output increased about 2.5 times


Starters: Contributing to improved fuel consumption and ease of installation in vehicles

Starters are the motors that start the engine. To reduce fuel consumption and improve ease of installation, more compact and lightweight designs are always in demand. Since we began production of the smallest class of starters in the world in 1984, and after having made improvement after improvement, we have achieved approximately twice the output per mass (W/kg) with the P-R/D4*1 over the twin-axle R/D*2, which went into production in 1977.

Output increased about 2.0 times

Electric power steering: Improving fuel consumption and creating superior steering response

Our electric power steering (EPS) has achieved fuel consumption improvements of 3-5% compared to the conventional hydraulic systems, and is rapidly being adopted by automakers. Since Mitsubishi Electric began production of the world's first EPS motor and ECU*3 in 1988, the company has maintained the top share of the market (current as of December 2014 according to in-house survey). The second-generation MCU(BLM)*4*5, which began production in 2013, has achieved a 50% reduction in surface area and a 30% reduction in mass compared to the first-generation model (which began production in 2004), making it the world's most compact and lightweight system. This system has improved handling stability over the hydraulic system, and has achieved superior steering response.

Volume about 50% less Mass about 30% less
  • *1 Planetary gear reduction starter
  • *2 Offset gear reduction starter
  • *3 ECU=Electric Control Unit
  • *4 MCU=Motor Controller Unit
  • *5 BLM=Brushless Motor

e-Mobility/Fuel cell-powered vehicles

Inverters: Contributing to improved electricity consumption and ease of installation in vehicles

The transfer-molded power module (TPM) houses the drive circuit, control circuit, condenser, and heat sink. Improved heat dissipation and high-level integration enable the production of a molded package that is more compact, lighter, and easier to install in vehicles.

  • ※1:IPU=Intelligent Power Unit
  • ※2:HEV=Hybrid Electric Vehicle
  • ※3:TPM=Transfer-molded Power Module
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