Natural gas engine system and control method for natural gas engine system
A technology of an engine system and a control method, which is applied in the directions of engine control, gaseous engine fuel, engine components, etc., can solve problems such as unsatisfactory and difficult to achieve fresh air demand, etc.
Active Publication Date: 2020-11-20
WEICHAI POWER CO LTD
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Problems solved by technology
Therefore, if according to the current t 1 If the amount of fresh air in the cylinder is used to calculate the amount of gas, when the actual injected gas reaches the cylinder through the intake pipe, there has been a delay phenomenon, that is, when the actual injected gas reaches the cylinder, it has already been t 2 At this moment, the gas volume at this time can no longer satisfy t 2 The demand of fresh air on the gas volume at all times, especially under transient conditions, the fresh air volume in the cylinder changes frequently. Even considering the changing trend of the fresh air volume in the cylinder, it is difficult to realize that the gas passed into the cylinder can meet the The need for fresh air in the cylinder
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[0026] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0027] It should be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may also be meant to include the plural forms unless the context clearly dictates otherwise. The terms "comprising", "comprising" and "having" are inclusive and thus indicate the presence of stated features, ele...
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The invention relates to the technical field of engines, and specifically relates to a natural gas engine system and a control method of the natural gas engine system. The natural gas engine system and the control method of the natural gas engine system aim at solving the technical problem that the actual fuel gas amount introduced into an air cylinder and the fuel gas amount needed by air in theair cylinder have a large error. In order to achieve the purpose, the natural gas engine system is provided and comprises the air cylinder and an air inlet pipe, one end of the air inlet pipe communicates with the air cylinder, the other end of the air inlet pipe communicates with an air pipeline and a fuel gas pipeline, and a throttling device is arranged at the position, positioned on the upstream position of the fuel gas pipe, of the air inlet pipe. The natural gas engine system further comprises a controller electrically connected with the throttling device, and the controller controls thefuel gas amount introduced into the air inlet pipe by the fuel gas pipeline according to the air amount circulated at the throttling device. According to the natural gas engine system and the controlmethod of the natural gas engine system, the fuel gas amount introduced into the air inlet pipe by the fuel gas pipeline is controlled according to the air amount circulated at the throttling device,and therefore the phenomenon that the fuel gas amount has a large error due to the loss of fuel gas in the air inlet pipe is reduced.
Description
technical field [0001] The invention relates to the technical field of engines, in particular to a natural gas engine system and a control method for the natural gas engine system. Background technique [0002] This section provides background information related to the present disclosure only and is not necessarily prior art. [0003] According to statistics, one of the main causes of air pollution is exhaust emissions. Therefore, the development of commercial vehicles that meet the emission requirements of China VI is the key work of the blue sky defense cause. Since the National VI natural gas engine system enters the market earlier than the diesel engine, the emission performance, economy and stability of the National VI natural gas engine system will face severe tests. [0004] At present, the National VI natural gas engine system mainly adopts single-point injection of gas. After the gas is injected in the intake pipe and pre-mixed with fresh air, it enters the cylind...
Claims
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IPC IPC(8): F02D9/08F02B43/10F02M26/20F02M63/00
CPCF02B43/10F02B2043/103F02D9/08F02M26/20F02M63/0012Y02T10/30
Inventor 王文霞王龙赵淞宋国梁高古祥
Owner WEICHAI POWER CO LTD