In order to occupy a place in the excavator market competition, many foreign well-known excavator manufacturers have proposed energy-saving control systems with independent intellectual property rights. The representative energy-saving control products of these companies mainly include PMS system of O&K, CAPS system of Link-Belt, EPC system of Caterpillar, OHS system of Hitachi, OLSS system of Komatsu, APC system of Kato, ITCs system of Kobelco, EPOS system of Daewoo, etc. The following Hitachi control system for a brief analysis.
The driver can choose different working modes according to different loads. The system automatically adjusts the throttle opening of diesel engine and the displacement of hydraulic pump according to the selected working mode. Through the combined adjustment of diesel engine and hydraulic pump, the suction power of hydraulic pump is equal to the output power of diesel engine, and the diesel engine works at the best working point.
