Outline of the Komatsu Hybrid System

The proprietary Komatsu Hybrid System converts energy generated when the upper structure of a hydraulic excavator reduces its speed while turning, stores the energy in the capacitor and uses it to assist the power of the engine via the power generation motor when the engine accelerates.

While standard equipment normally uses a hydraulic motor to turn the upper structure, we have developed an electric motor exclusively for the Hybrid. Through the use of this new motor, which recovers energy generated when the upper structure's turns slow down, we have achieved a hybrid hydraulic excavator.

Compared with the standard PC200-8, we have achieved an average reduction in fuel consumption of 25% via test results. Furthermore, in field tests with our customers, we confirmed a maximum reduction of 41% at a job site where the machine's upper structure turns more frequently.