Variable Altitude Control Strategy for Variable Flow Cooling System of Diesel Engine

A cooling system and control strategy technology, applied in the direction of coolant flow control, engine cooling, measuring devices, etc., can solve the problems of unsatisfied control accuracy and insufficient heat dissipation requirements of diesel engines at variable altitudes

Active Publication Date: 2022-04-22
MILITARY TRANSPORTATION UNIV PLA
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Problems solved by technology

[0005] At present, the improvement of the diesel engine cooling system mainly focuses on the single control of the cooling system components (such as water pumps, fans, and thermostats), and most of the control strategies use PID control. Meet the heat dissipation requirements of the diesel engine at variable altitudes, and the control accuracy cannot be met

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  • Variable Altitude Control Strategy for Variable Flow Cooling System of Diesel Engine
  • Variable Altitude Control Strategy for Variable Flow Cooling System of Diesel Engine
  • Variable Altitude Control Strategy for Variable Flow Cooling System of Diesel Engine

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0015] like figure 1 As shown, a diesel engine variable flow cooling system variable altitude control strategy applies variable universe fuzzy control technology, in which the input language variable of the variable universe fuzzy controller selects the deviation between the actual coolant temperature and the target temperature e=T e -T ed and its rate of change The output is the opening increment of the proportional overflow valve of the cooling fan, the opening increment of the thermostat and the speed increment of the cooling water pump u. On the basis of the basic fuzzy control domain (initial domain) [-E, E], adding expansion factor α(x), the initial domain [-E, E] changes to...

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Abstract

A variable-altitude control strategy for a variable-flow cooling system of a diesel engine. According to the atmospheric pressure, atmospheric temperature, diesel engine speed, and diesel engine load collected by the data acquisition module in the cooling system within the altitude range of 0m to 5500m, the variable domain fuzzy controller controls the coolant temperature The deviation and its rate of change signals are converted into analog signals and sent to the electric actuator, so that the electric actuator can control the total flow of diesel engine coolant, large and small circulation flow and cooling air flow in real time, reducing the parasitic loss of the cooling system. The control strategy adopts the integrated control of the variable altitude and variable flow cooling system based on the variable universe fuzzy control strategy. In the face of different altitudes and different working conditions, it realizes the coordinated control of the cooling water pump, thermostat, and cooling fan, and reasonably controls the total flow of the diesel engine coolant. , size circulation flow and cooling air flow.

Description

technical field [0001] The invention relates to the technical field of diesel engines, in particular to a variable altitude control strategy for a variable flow cooling system of a diesel engine. Background technique [0002] When vehicles, construction machinery and other power equipment are running on high altitudes, due to the deterioration of heat dissipation performance and the increase of the heat load of the diesel engine, the cooling water of the diesel engine is easy to boil, the cooling capacity of the cooling system is reduced, and the body is easy to overheat, etc. The continuous operating capacity and operating intensity in the plateau area have declined to varying degrees. These problems can be attributed to the poor match between the cooling system of the diesel engine and the working process of the diesel engine, and the immature control strategy of the high-altitude cooling system. [0003] The cooling system components include thermostat, cooling water pum...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01P7/04F01P7/16
CPCF01P7/164F01P7/044F01P7/167F01P7/16F01P2025/62F01P2025/64F01P2025/04F01P2025/13
Inventor 刘瑞林杨春浩周广猛张众杰
Owner MILITARY TRANSPORTATION UNIV PLA
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