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 Komatsu control system for a brief analysis.
Komatsu's closed load sensing system is a load sensing valve, which controls the output flow of the hydraulic pump according to the difference between the outlet pressure of the hydraulic pump and the outlet pressure of the operating valve. The hydraulic pump control valve can make the driving power of the hydraulic pump not exceed the power of the engine according to the set power level, so as to realize constant power control.
