Diesel altitude-variable self-adapting supercharging control method and system

A boost control and diesel engine technology, applied in mechanical equipment, combustion engines, machines/engines, etc., can solve the problem that the boost system cannot adapt to changes in altitude

Inactive Publication Date: 2008-12-24
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to design a diesel engine variable altit...

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  • Diesel altitude-variable self-adapting supercharging control method and system
  • Diesel altitude-variable self-adapting supercharging control method and system

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Embodiment Construction

[0019] Such as figure 1 The plateau variable altitude adaptive supercharging system of the diesel engine shown has a diesel engine 6, an intercooler 4, a variable-section supercharger composed of a compressor 2 and a variable-section turbine 9, and an electronic control unit 16. The diesel engine has an air intake Inlet 5, air outlet 7, the variable cross-section supercharger has a compressor 2 and a variable cross-section turbine 9, the compressor 2 and the variable cross-section turbine 9 are coaxial, and the compressor 2 has an air inlet 1 and an air outlet 3, which can be The variable section turbine 9 has an air inlet 8 and an air outlet 10, the compressor outlet 3 is connected to the intercooler 4, the intercooler 4 is connected to the diesel engine inlet 5, and the variable section turbine inlet 8 is connected to the diesel engine outlet 7 connected. The variable section turbine 9 has nozzle ring blades that can rotate around its own axis. 11 is the speed signal of th...

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Abstract

The invention discloses a method and a system for controlling a variable-altitude self-adapting supercharging for a diesel engine, relating to the technical field of supercharging control for a diesel engine, which is characterized in that an optimal supercharging pressure MAP is inquired to obtain the optimal supercharging pressure under the working condition of a stable state according to an inlet pressure signal of an air compressor, a rotating speed signal of an engine and a position signal of a gasoline throttle, the opening of a nozzle ring of a turbine is controlled by using a PI controller according to the difference value between the optimal supercharging pressure and the actual supercharging pressure to obtain an optimal circulating section; an optimal opening MAP of the nozzle ring is inquired to obtain the optimal opening of the nozzle ring under the working condition of a transient state according to the rotating speed signal of the engine and the inlet pressure signal of the air compressor so as to control the optimal circulating section. The system comprises a diesel engine, an intercooler, a variable-section supercharger consisting of an air compressor and a variable-section turbine, an electronic control unit, a pressure sensor and a temperature sensor etc. The method and system can adapt to the altitude variation and adjust the circulating section of the variable-section turbine so that the diesel engine has optimal dynamic property and fuel economy at each altitude.

Description

Technical field: [0001] The invention relates to the technical field of diesel engine supercharging control, in particular to a variable cross-section supercharging system capable of self-adaptive adjustment according to the change of plateau altitude. technical background: [0002] my country has the largest plateau region in the world. The plateau area above 1000 meters above sea level accounts for about 58% of the country's total area, and the plateau area above 2000 meters accounts for about 33%. The Qinghai-Tibet Plateau is the most representative plateau in my country and even in the world, with an average altitude of over 4,000 meters. The Qinghai-Tibet Plateau not only has a high average altitude, but also has the characteristics of a wide range of altitude changes. The maximum altitude change range of the Qinghai-Tibet, Sichuan-Tibet and Xinjiang-Tibet highways can reach 4,000 meters. [0003] As the altitude increases, the atmospheric pressure decreases and the in...

Claims

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Application Information

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IPC IPC(8): F02B37/24
CPCY02T10/12
Inventor 张扬军张海雷诸葛伟林郑新前
Owner TSINGHUA UNIV
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