Multi-mode large and small turbocharger diesel engine sequential supercharging structure

A turbocharger and sequential supercharging technology, applied in the direction of machines/engines, mechanical equipment, combustion engines, etc., can solve problems that do not involve improving the idling performance of turbocharged diesel engines, so as to reduce fuel consumption, reduce emissions, and improve The effect of air intake efficiency

Inactive Publication Date: 2013-10-16
HARBIN ENG UNIV
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Problems solved by technology

However, none of these three patents involves improving the idling performance of a supercharged diesel engine

Method used

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  • Multi-mode large and small turbocharger diesel engine sequential supercharging structure

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Embodiment Construction

[0013] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0014] combine figure 1 , the multi-mode diesel engine size turbocharger sequence supercharging structure involved in the present invention is composed of diesel engine 1, supercharger 9, 12, intercooler 4, diesel engine intake and exhaust pipes 3, 16, 17, control valves, etc., The sizes of the two superchargers are different. One end of the intake valve 2 is connected to the atmosphere, and the other end is connected to the intake pipe 17 . One end of the exhaust valve 18 is connected to the atmosphere, and the other end is connected to the exhaust communication pipe 5 . Gas valve A7 one end links to each other with small supercharger turbine 8, and the other end links to each other with A column exhaust pipe 3. One end of the air valve A6 is connected with the small supercharger compressor 10 , and the other end is connected with the intercooler 4 . One end o...

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Abstract

The invention aims at providing a multi-mode large and small turbocharger diesel engine sequential supercharging structure which comprises a small supercharger and a large supercharger, wherein a turbine of the small supercharger is communicated with an exhaust port of a diesel engine through an A row exhaust pipe, a turbine of the large supercharger is communicated with the exhaust port of the diesel engine through a B row exhaust pipe, a gas compressor of the small supercharger is communicated with an intercooler through an A row inlet pipe, a gas compressor of the large supercharger is communicated with the intercooler through a B row inlet pipe, the A row exhaust pipe and the B row exhaust pipe are communicated through an exhaust communication pipe, a first gas valve is arranged between the joint of the exhaust communication pipe and the A row exhaust pipe and the turbine of the small supercharger, a second gas valve is arranged between the joint of the exhaust communication pipe and the B row exhaust pipe and the turbine of the large supercharger, a first air valve is arranged on the A row inlet pipe, and a second air valve is arranged on the B row inlet pipe. The multi-mode large and small turbocharger diesel engine sequential supercharging structure enables the diesel engine to be switched into a non-supercharging mode at idle speed, and improves air inlet efficiency at the idle speed.

Description

technical field [0001] The invention relates to a diesel engine, in particular to a supercharging structure of the diesel engine. Background technique [0002] Sequential supercharging technology is the technology first adopted by German MTU company in the late 1970s. Its design is mainly to expand the working range of low compression ratio and high supercharging engine, increase the low-speed torque of the engine and reduce the part-load running time. Fuel consumption. Its basic principle is to use multiple turbochargers, which are sequentially put into operation as the engine speed and load increase, so as to ensure that the working turbochargers are always running in the high-efficiency zone, so that the engine's The fuel consumption rate is low throughout the operating range, and the low-speed high-torque performance is good. Its principle is similar to the variable section turbine, but it is different. The sequential supercharging system not only changes the area of ​...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/007F02B37/12F02B37/18F02M35/10
CPCY02T10/144Y02T10/12
Inventor 崔欣洁杨传雷王银燕冯永明王贺春高占斌孙永瑞
Owner HARBIN ENG UNIV
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