A device and method for improving the transient characteristics of a high-power V-type marine diesel engine based on the independent air supply of the main pipe
A marine diesel engine and transient characteristics technology, applied in mechanical equipment, combustion engines, engine components, etc., can solve problems such as inability to supply air regularly and quantitatively, uneven distribution of air supply in cylinders, poor transient characteristics, etc., and achieve rapid response , avoid uneven distribution, and solve the effect of poor transient characteristics
Active Publication Date: 2022-04-29
HARBIN ENG UNIV
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problem of poor transient characteristics of the diesel engine due to insufficient intake air in the transient process, and the problem of uneven distribution of gas replenishment in the two rows of cylinders caused by gas replenishment in the connecting pipe, and the inability to replenish gas regularly and quantitatively. A device and method for improving the transient characteristics of a high-power V-type marine diesel engine based on the independent air supply of the main pipe
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[0015] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0016] combine Figure 1-3 , figure 1 It is a general structure diagram of a high-power V-type diesel engine with an air supply device. Among them, the supercharged diesel engine adopts the sequential supercharging technology, and its basic components include the A-row intake manifold 1 and the basic turbocharger 2 on the side of the A-row cylinders 17 (A1, A2, A3, A4, A5, A6) of the diesel engine. , row A exhaust manifold 3 and row A intercooler 18; on one side of row B cylinders 14 (B1, B2, B3, B4, B5, B6) includes row B intake manifold 9, controlled turbocharger 7 , B row exhaust main pipe 6, waste gas valve 5, air valve 8 and B row intercooler 13, and the intake connecting pipe 4 that communicates with two rows of intake main pipes and the exhaust connecting pipe 15 that connects two rows of exhaust main pipes. The transient characteristic improvement devic...
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The purpose of the present invention is to provide a high-power V-type marine diesel engine transient characteristic improvement device and method based on the main pipe independent air supply, mainly including: high-compression air source, air supply pipe, air supply injection valve, high pressure nozzle, intake pressure sensor, crank angle sensor and control unit etc. In the present invention, the air supply device is installed on the intake manifold on both sides of the V-type diesel engine, and the diesel engine is equipped with sensors for detecting the rotating speed and the pressure of the intake manifold, so as to transmit the operating conditions of the diesel engine to the control system and collect the operating status of the diesel engine in real time , and then control the operation of the air supply device through the control system, so as to quantitatively supply air when the intake air of the diesel engine is insufficient, to meet the rapid demand for air volume in transient conditions and improve the transient characteristics of the diesel engine to avoid deterioration of combustion and emissions.
Description
technical field [0001] The invention relates to a diesel engine, in particular to a diesel engine intake and exhaust device and a control method. Background technique [0002] With the continuous development of marine diesel engines, high-power V-type diesel engines have been more and more widely used, and turbocharging has become one of the indispensable technologies for improving the performance of diesel engines. However, large diesel engines that use single-engine supercharging will have the problem of insufficient torque under low working conditions in actual use, so sequential supercharging technology is often used to solve this problem. Successive supercharging technology has also become the trend of future development. The basic principle of sequentially supercharged diesel engine is: a supercharged diesel engine uses multiple superchargers, and as the speed and load increase, the superchargers are put into operation one after another to achieve the best match betwe...
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IPC IPC(8): F02B39/00F02B39/16F02B37/22F02B77/08
CPCF02B39/00F02B39/16F02B37/225F02B77/081Y02T10/12
Inventor 杨立平聂昊鹏王立媛韩冰
Owner HARBIN ENG UNIV