DENSO’s DC-DC converter is about 10 percent smaller than a conventional DC-DC converter.

Tokyo—DENSO recently introduced four new components for hybrid electric vehicles (HEVs).

Control

The hybrid control computer, developed jointly with Toyota Motor Corporation, integrates such control functions as hybrid system control, engine control, and battery control into one unit, achieving a significant size reduction of the control units.

Check

The new battery-monitoring unit checks the main battery’s condition including voltage, current and temperature, traditionally performed by the battery ECU. The battery-monitoring unit was designed separately from the hybrid control computer as it needs to be installed close to the main battery.

Convert

DENSO’s newly developed DC-DC converter is approximately 10 percent smaller than a conventional DC-DC converter. However, the increased output current (from 100 to 120 amperes) can respond to the electric power needs of larger vehicles. The use of a new circuit control technology enabled DENSO to reduce energy loss in the DC-Dc converter.

The battery monitoring unit checks the main battery’s condition.		The electric compressor was jointly developed with Toyota Industries Corp.

Compress

The electric compressor, jointly developed with Toyota Industries Corporation, is the first in the world to incorporate an inverter that drives the built-in motor. This structure reduces the compressor size by approximately 60 percent, compared with conventional components. The reduced size was accomplished by using simplified circuits and a higher-density mounting with three-dimensional wirings. Hiromi Tokuda, managing officer, Powertrain Control Systems Business Group at DENSO Corporation, commented on the new products: “DENSO has been providing components for hybrid vehicles since 1997 when the Toyota Prius was first introduced to the market. Using our experience and expertise, DENSO will continue to develop new technologies and products for hybrid vehicles and contribute to vehicles that are less harmful to the environment.”

The hybrid control computer was jointly developed with Toyota Motor Corp.