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Diesel oil/natural gas dual-fuel engine emission control strategy

A dual-fuel engine and emission control technology, applied in engine control, fuel injection control, machine/engine, etc., can solve the problem of inability to improve the trade-off relationship of combustion products in the cylinder, increase the workload of the post-processing device, etc. problems, to achieve controllable layered distribution, avoid poor cooling, and facilitate normal operation

Inactive Publication Date: 2018-09-21
JIANGSU UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional internal combustion engines, due to factors such as combustion mode, fuel characteristics, and the way fuel enters the cylinder, cannot improve the trade-off relationship of combustion products in the cylinder, thus increasing the requirements for complex and expensive post-processing devices (SCR, DOC, DPF, etc. ) and the workload of the post-processing device

Method used

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  • Diesel oil/natural gas dual-fuel engine emission control strategy
  • Diesel oil/natural gas dual-fuel engine emission control strategy
  • Diesel oil/natural gas dual-fuel engine emission control strategy

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Embodiment Construction

[0027] The following examples can enable those skilled in the art to understand the present invention more comprehensively, but the present invention is not limited to the scope of the described examples.

[0028] Such as Figure 1 to Figure 5 A diesel / natural gas dual-fuel engine emission control strategy is shown, and the specific control strategy is as follows:

[0029] S1: Crankshaft position sensing and load judgment: the dual-fuel ECU reads the crankshaft rotation angle and rotational speed signal sent by the crankshaft position sensor, and the position signal of the car accelerator pedal given by the accelerator pedal sensor is used to reflect the load of the engine, thereby providing The load level of the dual-fuel engine is obtained, that is, it is judged that the operating conditions of the engine are cold start, idle speed, low load, medium-low load, medium-high load, and heavy load.

[0030]S2: Control of the oil-gas common injector: The oil-gas common injector 10...

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Abstract

The invention relates to a diesel oil / natural gas dual-fuel engine emission control strategy which is characterized by comprising the following specific steps: S1, sensing the crankshaft position andjudging load; and S2, controlling an oil gas shared ejector. Ejection of diesel oil and natural gas can be controlled in real time through the oil gas shared ejector and a dual-fuel ECU to adjust concentration distribution and characteristic distribution of fuel in an oil cylinder in real time; and aiming at different working conditions and the combustion characteristics of fuel, and by combiningthe flexible ejection strategy and proper EGR, the mixing characteristic and the ignition characteristic of the interior of the cylinder can be effectively controlled to optimize cylinder interior combustion and reduce emission of NOX, PM, HC and CO at the same time.

Description

technical field [0001] The invention relates to the research field of dual-fuel engine tail gas emission control, in particular to a diesel / natural gas dual-fuel engine emission control strategy. Background technique [0002] Modern internal combustion engines need to meet stringent emission standards, including nitrogen oxides (NO X ), particulate matter (PM), hydrocarbons (HC), carbon oxides (CO), etc. Traditional internal combustion engines, due to factors such as combustion mode, fuel characteristics, and the way fuel enters the cylinder, cannot improve the trade-off relationship of combustion products in the cylinder, thus increasing the requirements for complex and expensive post-processing devices (SCR, DOC, DPF, etc. ) and the workload of the post-processing device. Therefore, it is particularly important to improve the trade-off relationship of combustion products in the cylinder, and adopt the best emission control strategy according to different loads to achieve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/38F02D41/00F02D19/08F02D19/10F02M43/04
CPCF02D19/0647F02D19/0694F02D19/081F02D19/105F02D41/0025F02D41/38F02M43/04
Inventor 肖民周星星
Owner JIANGSU UNIV OF SCI & TECH
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