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Supercharging gasoline engine air administrative system

An air management system and gasoline engine technology, applied in mechanical equipment, combustion engines, machines/engines, etc., can solve the problems of insufficient turbocharged low-speed torque of gasoline engines, and achieve good control of intake air temperature, optimized working conditions, and high boost ratio Effect

Inactive Publication Date: 2008-12-31
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, gasoline engine supercharging generally has the problem of insufficient low-speed torque

Method used

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  • Supercharging gasoline engine air administrative system
  • Supercharging gasoline engine air administrative system
  • Supercharging gasoline engine air administrative system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] figure 1 It is a schematic flow chart of the first system of the present invention under medium and high-speed working conditions. The main compressor 5, the double-effect turbine compressor 3, the intercooler 2, the double-effect turbine 4, the cylinder 1 and the main turbine 6 are sequentially connected in series. After the gas is compressed and boosted by the main compressor 5, it enters the double-effect turbo compressor 3 for secondary boost; then enters the intercooler 2, and is cooled by heat exchange with the cooling medium; then the gas passes through the first valve 7 And the second valve 8 enters the double-effect turbine 4, through expansion, the intake air temperature is reduced, and it enters the cylinder 1 through the third valve 9 and the fourth valve 10; after the gas is burned in the cylinder 1, it passes through the main turbine 6 and the second Five valves 11 discharge. When the intake air temperature meets the requirements, the double-effect turbin...

Embodiment 2

[0018] figure 2 It is a schematic flow chart of the first system of the present invention under low-speed working conditions. The main compressor 5, the double-effect turbine compressor 3, the intercooler 2, the cylinder 1, the main turbine 6 and the double-effect turbine 4 are connected in series in sequence. After the gas is compressed and boosted by the main compressor 5, it enters the double-effect turbo compressor 3 for secondary boost; then enters the intercooler 2, and is cooled by heat exchange with the cooling medium; then the gas passes through the first valve 7 And the fourth valve 10 enters the cylinder 1. After the gas burns in the cylinder 1 and does work, it passes through the main turbine 6. Due to the small gas flow under low-speed conditions, the expansion ratio of the gas at the main turbine 6 is close to 1; then the gas passes through the fifth valve. 11 and the second valve 8, enter the double-effect turbine 4, and the exhaust gas is expanded at the doubl...

Embodiment 3

[0021] image 3 It is a schematic flow chart of the second system of the present invention at medium and high speed working conditions, the main compressor 5 and the double-effect turbine compressor 3 are combined into a compressor 12, and the compressor 12 is coaxial with the double-effect turbine 4 and the main turbine 6 Arrangement; compressor 12, intercooler 2, double-effect turbine 4, cylinder 1 and main turbine 6 are connected in series in sequence. After the gas is compressed and boosted by the compressor 12, it enters the intercooler 2 and is cooled by heat exchange with the cooling medium; then the gas enters the double-effect turbine 4 through the first valve 7 and the second valve 8, and expands to make The temperature of the intake air decreases, and it enters the cylinder 1 through the third valve 9 and the fourth valve 10; the gas is discharged through the main turbine 6 and the fifth valve 11 after combustion in the cylinder 1. When the intake air temperature m...

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Abstract

The invention belongs to the gasoline engine field, in particular to an air management system of a supercharger gasoline engine, which comprises an air compressor, an intercooler, a main turbine and a double-effect turbine; in the medium or high speed operating condition, the double-effect turbine is serially connected behind the intercooler; the a cylinder and a main turbine are serially and sequentially connected behind the double-effect turbine; the double-effect turbine acts the turbine cooling effect; in the low speed operating condition, the intercooler, the cylinder and the main turbine are serially connected, and then the double-effect turbine is serially connected; the double-effect turbine acts the effect of improving the output torque. The air management system of a supercharger gasoline engine has the advantages of realizing the functions of turbine cooling and the double turbo supercharging, well controlling the inlet gas temperature, allowing higher supercharging ratio and improving the low-speed torque, adopting different operation modes under the high, medium and low rotation speeds, enabling the operation state of the system to be optimized under different operating conditions.

Description

technical field [0001] The invention belongs to the field of gasoline engines, in particular to an air management system of a supercharged gasoline engine. Background technique [0002] With the increasing requirements for energy saving and emission reduction, gasoline engine supercharging technology has been more and more widely used. However, because the gasoline engine is prone to knocking and other problems after the intake air is supercharged, its supercharging ratio is limited. Foreign studies have shown that the intake air temperature is the main reason for knocking. If the intake air temperature can be controlled, the boost ratio can be further increased, making the effect of energy saving and emission reduction more obvious. [0003] The air intake cooling commonly used now is to use an intercooler to achieve cooling through heat exchange with the outside world. However, the intercooler has problems such as unsatisfactory cooling effect under some working conditi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/00F02B29/04F02B41/10
CPCY02T10/12
Inventor 张扬军魏玮陈涛诸葛伟林郑新前汪茂海
Owner TSINGHUA UNIV
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