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A V-shaped Diesel Engine Constant Pressure Sequential Supercharging System

A technology of successive supercharging and diesel engines, applied in mechanical equipment, engine components, combustion engines, etc., can solve the problems of large intake pipeline layout space, increased throttling loss, and many auxiliary devices, etc., to promote work stability, The effect of stabilizing gas pressure and improving compactness

Active Publication Date: 2016-11-23
中国船舶集团有限公司第七一一研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the sequential supercharging system is applied to small diesel engines, for example, the internal combustion engine with the sequential supercharging system proposed by the application number 201080020951.5, its disadvantage is that it is necessary to install a driving device on the controlled supercharger, additional auxiliary devices Many, complex structure
Such an air intake pipeline has a large layout space, and the exhaust pipeline communicates through the connecting valve, which will increase the throttling loss when the two rows of exhaust gas are connected.

Method used

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  • A V-shaped Diesel Engine Constant Pressure Sequential Supercharging System
  • A V-shaped Diesel Engine Constant Pressure Sequential Supercharging System
  • A V-shaped Diesel Engine Constant Pressure Sequential Supercharging System

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Embodiment 1

[0034] Such as figure 1 As shown, a preferred embodiment of the V-type diesel engine constant pressure sequential supercharging system of the present invention includes: two rows of cylinders composed of a plurality of cylinders 1, an air cooler 2, a common air intake box 3, exhaust branch pipes 4, constant pressure Exhaust manifold 5, first rear exhaust pipe 6, second rear exhaust pipe 7, first intake pipe 8, second intake pipe 9, first turbocharger 10, second turbocharger 11; wherein , the first turbocharger 10 includes a first compressor 12 arranged in the first intake pipe 8 and a first turbine 13 arranged in the first rear exhaust pipe 6, and the second turbocharger 11 includes a The second compressor 14 in the second intake pipe 9 and the second turbine 15 arranged in the second rear exhaust pipe 7; in addition, the second intake pipe 9 is also provided with an intake cut-off valve 16, the second rear row An exhaust cut-off valve 17 is also arranged in the air pipe 7 . ...

Embodiment 2

[0039] Such as image 3 As shown, the common air intake box 3 of the present embodiment is specially designed: the top of the common air intake box 3 is a plane, and the two sides of the lower part along the axial direction (air flow direction) are inclined planes, and a foot seat is also included; After cooling, it enters the common air intake chamber 32. In addition, it also integrates the cylinder head high-temperature water drainage main pipe 31 and the cylinder head high-temperature water inlet main pipe 33. The cylinder head high-temperature water drainage main pipe 31 is divided into left and right two, corresponding to the left and right Two banks of cylinders. This design can improve the compactness of the diesel engine layout, and the cylinder head high-temperature water drainage main pipe 31, the common air intake chamber 32 after the intercooler and the cylinder head high-temperature water inlet main pipe 33 have a unified installation plane with the cylinder head,...

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Abstract

The invention discloses a constant pressure sequential turbo-charging system of a V-shaped diesel engine. The constant pressure sequential turbo-charging system comprises two columns of air cylinders composed of multiple air cylinders, multiple air exhaust branches corresponding to the multiple air cylinders, a constant pressure exhaust manifold, a shared air inlet box, a first turbocharger, a second turbocharger, an air cooler, an air inlet stop valve and an exhaust stop valve. The constant pressure sequential turbo-charging system is characterized in that the two columns of air cylinders share the same shared air inlet box; the constant pressure exhaust manifold is connected with the air exhaust branches corresponding to the air cylinders to form a loop. In addition, the invention further provides the design of the shared air inlet box. The shared air inlet box comprises a shared air inlet cavity, cylinder cover high-temperature water discharge header pipes and a cylinder cover high-temperature water inlet header pipe. The constant pressure sequential turbo-charging system can improve the performance of full working conditions of the single-stage high-pressure-ratio diesel engine and is compact in structure, so that the overall size of the diesel engine is controlled.

Description

technical field [0001] The invention relates to the technical field of medium and high-speed marine diesel engines, in particular to a constant-pressure exhaust pipe system sequential supercharging system of a V-type diesel engine for improving the performance of all working conditions. Background technique [0002] Sequential Turbo Charging (STC) system refers to a supercharging system composed of two or more turbochargers connected in parallel, which are put into operation sequentially as the speed and load of the supercharged engine increase. When the speed or load is lower than a certain set value, cut off the exhaust gas of one or several turbocharger turbines and the air supply of the compressor, so that the exhaust gas flows through the working turbocharger turbines concentratedly, increasing the exhaust gas flow rate and improving the efficiency. Turbine efficiency, so that the energy of exhaust gas can be fully utilized, the boost pressure can be increased, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02B37/007F02M35/10F01N13/08F02B29/04F02B37/12F02B67/00F01P11/04
CPCY02T10/12
Inventor 谌祖迪王新权闫萍仲杰郑亮黄立
Owner 中国船舶集团有限公司第七一一研究所
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