Horsepower control method for hydraulic pump of compensate height of construction machinery
A highly compensated, engineering machinery technology, applied in engine control, mechanical equipment, fluid pressure actuation devices, etc., to solve the problem of unstable engine static and dynamic characteristics, unstable engine and pump load rates, incomplete fuel combustion, etc. problems, to achieve the effect of ensuring dynamic and static characteristics and improving durability
Inactive Publication Date: 2013-07-31
DOOSAN INFRACORE CO LTD
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Problems solved by technology
Therefore, the fuel does not burn completely, which means there is an excess supply of fuel
[0006] Also, there is a risk of excessive soot from incomplete combustion of the fuel
[0007] As mentioned above, in the case of excess fuel supply, although the engine torque is small, an excessive amount of fuel flows in, so there is a problem that the load factor is not stable during the use of the engine and the pump.
Moreover, the static and dynamic characteristics of the engine can be very unstable
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[0025] The advantages, features and methods for realizing them of the present invention are described by reference and accompanying Figure 1 It will be more clear from the following examples in detail.
[0026] On the other hand, each of the following terms is a term set in consideration of the functions of the present invention and varies depending on the manufacturer's intention or customary practice, and therefore should be defined based on the entire contents of this specification.
[0027] Refer below image 3 and Figure 4 , illustrating a method for controlling the horsepower of a height-compensated hydraulic pump of a construction machine according to an embodiment of the present invention.
[0028] In the attached picture image 3 It is a graph for illustrating the atmospheric pressure versus pump proportional current value in the height compensation hydraulic pump horsepower control method of construction machinery according to an embodiment of the present invent...
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The invention relates to a horsepower control method for hydraulic pump of compensate height of construction machinery. The horsepower control method for hydraulic pump of compensate height of construction machinery comprises a barometric pressure value inputting step (S10) in which barometric pressure value is inputted from a barometric pressure sensor, a barometric pressure comparing step (S20) in which the barometric pressure value inputting step (S10) is retrieved if the barometric pressure value is more than a set barometric pressure value, a horsepower mapping relation reducing execution step (S30) in which a horsepower mapping relation is loaded and executed if the barometric pressure value is lower than a set barometric pressure value in the barometric pressure comparing step (S20), and a proportional current ratio changing and executing step (S40) in which current value is fixed at a set current value if the horsepower mapping relation is executed.
Description
technical field [0001] The present invention relates to a height compensation hydraulic pump horsepower control method for engineering machinery, in more detail, relates to a height compensation hydraulic pump horsepower control method (horsepower control method for hydraulic pump of compensated engineering machinery) that can cope with the reduction of engine output caused by height height of construction machinery). Background technique [0002] Generally, a construction machine includes an engine and a hydraulic device, and the hydraulic device is driven by power output from the engine. The engine generates power by successive explosive strokes produced by combusting a mixture of fuel and air. In a hydraulic device, a hydraulic pump is driven by the power of an engine to discharge hydraulic oil, and various transmission devices are operated by the hydraulic oil. [0003] Generally speaking, the engine is manufactured according to the standard atmosphere and the height i...
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IPC IPC(8): F02D29/04
CPCB60Y2200/41F15B13/02F15B21/006F15B2211/20523F15B2211/275
Inventor 李奉珍郭圭先张政权
Owner DOOSAN INFRACORE CO LTD