Method and device for testing impulsive load of diesel engine

A technology of pulse load and test method, which is applied in the direction of internal combustion engine testing, electric power measurement by using pulse modulation, etc., can solve the problem that the pulse control of diesel engine output power cannot be stepped, the output power of diesel engine cannot realize instantaneous mutation, and the diesel engine cannot be stepped. Pulse change control and other issues

Inactive Publication Date: 2011-08-03
CRRC DALIAN CO LTD
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  • Abstract
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Problems solved by technology

Due to the function of the PI regulator, the excitation current has a certain rate of rise and fall, so the output power of the diesel engine cannot realize instantaneous mutation, and the output power of the diesel engine cannot be controlled by stepwise pulse changes.
[0007] In short, with the existing diesel engine pulse load test method, it is impossible to perform stepwise pulse control on the output power of the diesel engine

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  • Method and device for testing impulsive load of diesel engine
  • Method and device for testing impulsive load of diesel engine
  • Method and device for testing impulsive load of diesel engine

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Embodiment Construction

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0044] see figure 1 , because in the diesel engine pulse load test, the load of the main generator of the diesel engine is a resistive load, and, because the load resistance is constant, the pulse width of the input signal P1 is different, resulting in the excitation current flowing through the excitation coil L1 Therefore, in Embodiment 1 of the...

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Abstract

The invention provides a method for testing the impulsive load for a diesel engine, which comprises: regulating the rotation speed of the diesel engine to an acquired target rotation speed; acquiring the impulse width of an impulse modulation signal according to the acquired target output power of the diesel engine; controlling the exciting current of the diesel engine by using the impulse modulation signal with the impulse width; and measuring the output power of the diesel engine. The invention also provides a device for testing the impulsive load of the diesel engine. When the method and the device for testing the impulsive load of the diesel engine, which are provided by the invention, are used, the corresponding impulse width is determined according to the target output power, the impulse modulation signal with the impulse width is used to control the exciting current of the diesel engine, and thus, the step control over the exciting current is realized through stepwise regulating impulse width and consequently the step control over the output power of the diesel engine is realized.

Description

technical field [0001] The invention relates to diesel engine testing technology, in particular to a diesel engine pulse load testing method and a diesel engine pulse load testing device. Background technique [0002] In the ship degaussing project, the diesel engine needs to complete the degaussing work of the ship in practical application. Therefore, when testing the diesel engine, it is necessary to conduct a pulse load test on the diesel engine at a speed of 1000rpm, that is, to conduct a pulse load test on the output power of the diesel engine. The stepped pulse control is used to test the performance of the diesel engine to achieve sudden power rise and fall in an instant. [0003] figure 1 It is a structural schematic diagram of an existing diesel engine testing system. Such as figure 1 As shown, the system includes: excitation resistor Rlt, freewheeling diode D1, field effect transistor Q1, excitation coil L1, excitation generator 11, excitation rectifier 12, main...

Claims

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Application Information

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IPC IPC(8): G01M15/04G01R21/127
Inventor 韩树明蔡志伟邢为为
Owner CRRC DALIAN CO LTD
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