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1105 results about "Throttle control" patented technology

Movable arm potential energy recovery method and apparatus of hydraulic excavator

The invention discloses a method for recovering potential energy of a movable arm of a hydraulic digging machine and a device thereof. The method comprises the following steps: firstly, the potential energy is stored through an energy accumulator in the retraction process of a hydraulic cylinder; and secondly the stored energy in the energy accumulator drives a generator to generate electricity, thereby realizing the recovery of the potential energy of the movable arm of the hydraulic digging machine. A mode for storing the potential energy is to convert the potential energy into pressure energy. The energy accumulator and the generator are connected through a proportioning valve so as to control the rotational speed of the generator. The method realizes high-efficiency recovery of the potential energy of the movable arm of the hydraulic digging machine; the principle of the method is to skillfully change the working time of hydraulic oil for power generation through the function of energy storage of the energy accumulator and provide effective buffering for recovering the potential energy; in addition, through the throttling control of the proportioning valve, the method reduces pressure fluctuation of the hydraulic oil in the power generation process, realizes the adjustment of the working rotational speed of the generator, improves the working efficiency of the generator and further improves the efficiency of energy recovery.
Owner:CENT SOUTH UNIV

Air-conditioning system, air-conditioner and refrigerant recycling control method

The invention discloses an air-conditioning system. The air-conditioning system comprises a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, a control valve and a throttling control assembly. The first end of the four-way valve is connected with the second end of the four-way valve through the outdoor heat exchanger, the throttling control assembly, the indoor heat exchanger and the control valve in sequence. The third end of the four-way valve is connected with an exhaust outlet of the compressor. The fourth end of the four-way valve is connected with an air return opening of the compressor. The throttling control assembly is used for throttling a refrigerant flowing into the indoor heat exchanger from the outdoor heat exchanger, and meanwhile controlling the opening degree of a flow path between the outdoor heat exchanger and the indoor heat exchanger. The invention further provides an air-conditioner and a refrigerant recycling control method. According to the air-conditioning system, the air-conditioner and the refrigerant recycling control method, when the refrigerant is recycled, the throttling control assembly can be closed directly so as to recycle the refrigerant, the control valve is closed to achieve automatic recycling of the refrigerant when refrigerant recycling is completed, and thus the refrigerant recycling cost can be reduced.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1

Combine power selection system

A system for propelling a combine over the ground and driving other components of the combine includes an engine driving a transmission via a hydrostatic drive system. A microprocessor stores a work table and a road table for controlling engine speed. A gear selector operates a switch to select one of the tables and a throttle control operates switches to select a speed value from the selected table. When working a field, the work table is selected so that the engine runs at speeds in a range suitable for driving the other components. For transport of the combine the road table is selected so that the engine may run at a speed higher than speeds suitable for driving the other components. For a given setting of the throttle control, the engine is controlled to run at either a first or second speed depending on the setting of the gear select lever.
Owner:BLUE LEAF I P +1

High compression spark-ignition engine with throttle control, externally supplied ignition, and direct fuel injection into a precombustion chamber

The invention relates to a spark-ignition engine with a highly structural compression ratio greater than 15:1, throttle regulation, externally supplied ignition and with direct fuel injection into a precombustion chamber, which is connected to the main combustion chamber via an overflow channel. The fuel is injected into the precombustion chamber during the compression stroke and is ignited by a spark plug located in a manner that is as central as possible. The invention relates to a spark-ignition engine with a highly structural compression ratio greater than 15:1, throttle regulation, externally supplied ignition and with direct fuel injection into a precombustion chamber, which is connected to the main combustion chamber via an overflow channel. The fuel is injected into the precombustion chamber during the compression stroke and is ignited by a spark plug located in a manner that is as central as possible.
Owner:SCHUBERT GOTTFRIED

Multiple directional control valve system for return oil throttle control with load sensitive pressure compensation

The invention relates to a multiple directional control valve system for return oil throttle control with load sensitive pressure compensation, in particular to a multiple directional control valve system apparatus for the return oil throttle control with load sensitive pressure compensation for excavators. In the system, a filter is communicated with a throttle valve communicated with a pressure reducing valve, the pressure reducing valve is communicated with a load sensor port, two ends of the control valve are respectively connected with a first control port or second control port, the load sensor port is communicated with a one-way valve communicated with a pressure compensator, and the pressure compensator is communicated with the control valve. The outlet of a load sensitive variable pump is respectively communicated with a flow control valve, a pressure stop valve, a power adjusting valve and a variable oil cylinder, the flow control valve is communicated with the variable oil cylinder and the load sensor port, and rod cavities of the first and second variable oil cylinder are respectively connected with a swash plate of the load sensitive variable pump. The invention has the advantages of simple structure, improved accuracy of operation, high control degree and reliability and is widely used for hydraulic multiple-way valve systems of the engineering machinery industry.
Owner:SHANDONG TAIFENG INTELLIGENT CONTROL CO LTD
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