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The valve control system is essentially a throttling system. On Excavator Crawler Hydraulic the common three-position six-way multi-way valve is commonly used, and the fine-tuning performance and composite operation performance of the slide valve are poor. Since the 1990s, load sensing control systems have been used on hydraulic excavators, and their control flashes are equipped with pressure compensation valves whether they are in the middle open mode or in the middle closed mode.
Compared with the traditional Excavator Crawler Hydraulic system, the hydraulic excavator hydraulic system using electronic control pressure compensation has the following main advantages: (1) saving energy consumption. No matter whether the common three-position six-way reversing valve adopts a fixed pump or a variable pump, a part of the oil will always overflow through the overflow valve, which wastes energy.
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