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Marine propulsion diesel engine supercharged air temperature sectional type control system

A segmented control and pressurized air technology, applied in mechanical equipment, combustion engines, machines/engines, etc., can solve the problem of reducing the overall performance of diesel engines, the inability to take into account the high-load and low-load operating areas of diesel engines, and surge margins Lowering and other issues

Inactive Publication Date: 2021-02-26
SHANNXI DIESEL ENGINE HEAVY IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the analysis of the operation principle of the supercharger, under low load conditions, as the temperature of the supercharged air increases, the flow rate of the supercharged air decreases, which will cause a decrease in the surge margin
[0011] In summary, since the compressor and turbine end of the turbocharger operate jointly, the selected and matched turbocharger usually cannot take into account the high-load and low-load operating regions of the diesel engine through the existing control methods, which reduces the increase in diesel engine part load. The surge margin of the compressor reduces the overall performance of the diesel engine

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  • Marine propulsion diesel engine supercharged air temperature sectional type control system
  • Marine propulsion diesel engine supercharged air temperature sectional type control system
  • Marine propulsion diesel engine supercharged air temperature sectional type control system

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] It should be noted that, in this document, the terms "comprising", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or apparatus. without further restrictions. An element defined by the phrase...

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Abstract

The invention provides a marine propulsion diesel engine supercharged air temperature sectional type control system, belongs to the technical field of diesel engines, and aims to overcome the defectsin the prior art, break through the matching concept of a traditional supercharger and a diesel engine and provide a new control thought for the defects of two existing control modes in the operationof a fixed-pitch propeller propulsion diesel engine. Through a sectional control method of the supercharger supercharged air temperature under different rotating speed sections, the surge margin of the supercharger under partial load of the diesel engine is increased under the condition that low-load combustion is not affected, good performance matching performance of the supercharger and the diesel engine is achieved, the comprehensive performance of the diesel engine is improved, precious experience and practice bases are provided for subsequent matching of the supercharger and the diesel engine, and the method is effective, convenient to implement and low in application cost.

Description

technical field [0001] The invention belongs to the technical field of diesel engines, and in particular relates to a segmented control system for supercharged air temperature of a marine propulsion diesel engine. Background technique [0002] Exhaust gas turbochargers have been widely used in marine diesel engines. Exhaust gas turbocharger and diesel engine are two kinds of machines with different working principles and obviously different working characteristics. There is a problem of matching and adjustment in their joint operation. When matching, the main design parameters of the exhaust gas turbocharger are usually determined according to the calibrated working conditions, and then software such as GT-POWER performs the joint matching calculation of the compressor and the turbine to select the model of the turbocharger. A set of flow elements is selected for machine matching test to optimize the performance of turbocharger and diesel engine when they operate together. ...

Claims

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Application Information

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IPC IPC(8): F02B29/04
CPCF02B29/0493Y02T10/12
Inventor 赵建平张技术张杰曹阳李新牛治国
Owner SHANNXI DIESEL ENGINE HEAVY IND
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