随着液压技术向高压、大功率、高效率、高可靠性、低噪声、集成化、自动化的方向发展,泵的变量控制及其特性的研究引起了日益广泛的兴趣,泵的各种变量控制特性如限压式、恒压式、恒功率式,稳流量式……等都仅能在某一特定的负载条件下有较高的效率,不能解决泵的调节特性与负载工况完全适应的矛盾,功率损 With the development of hydraulic technology towards high pressure, high power, high efficiency, high reliability, low noise, integration and automation, the research on variable pump control and its characteristics has attracted more and more interest. Various variable control of the pump Features such as pressure limiting, constant pressure, constant power, steady flow ... ... and so on are only in a particular load conditions have a higher efficiency, can not solve the adjustment characteristics of the pump and load conditions fully adapted Contradiction, power loss