On-board emission control method and device for diesel engine
A control method and technology for diesel engines, which are applied in engine control, electrical control, fuel injection control, etc., can solve the problem of inefficient exhaust gas treatment capability, low cyclic load in on-board testing, and difficulty in meeting the requirements of on-board methods for heavy trucks and intercity buses. question
Inactive Publication Date: 2020-07-07
BEIJING FOTON CUMMINS ENGINE
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[0004] At the same time, the country has imposed strict regulations on the total weight of flatbed and dump trucks used in heavy-duty trucks. This has brought severe challenges to the on-board emission of heavy-duty diesel engines. According to the standard load requirements, heavy-duty diesel engines often face "Malaysia In the case of pulling a small car, the test cycle load of the vehicle-mounted method is relatively low, and it is difficult to meet the requirements of the vehicle-mounted method for a large number of heavy-duty trucks and intercity buses on the SCR route
[0005] In the process of realizing the present invention, the inventors of the present application found that the existing technical solutions have low exhaust gas temperature and low exhaust gas treatment capacity during the low-load operation stage of the vehicle engine, and cannot achieve the reduction of nitrogen oxides and meet the emission regulations of the vehicle-mounted law. Defects
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[0041] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.
[0042] figure 1 It shows a schematic diagram of a method for controlling emissions of a diesel engine on-board method provided by an embodiment of the present invention, as shown in figure 1 As shown, the vehicle operating conditions are collected in real time during vehicle operation, and the engine load of the vehicle is judged according to the vehicle operating conditions. Efficiency, send a cylinder cut-off command, control part of the cylinders of the multi-cylinder engine to stop fuel injection and intake and exhaust, reduce pumping loss, increase the load rate of the remai...
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An embodiment of the invention provides an on-board emission control method and device for a diesel engine. The method comprises the following steps: collecting vehicle operating conditions, judging load of the engine according to the vehicle operating conditions, sending a cylinder deactivation instruction under the condition that the vehicle engine runs in a low-load area for a set time, and controlling corresponding cylinders of the engine to be closed according to the cylinder deactivation instruction, so that thermal cycle efficiency and load rate of the engine are increased, and the exhaust gas treatment effect is improved. According to the technical scheme, the load of the vehicle engine is determined according to the collected vehicle operating conditions, the cylinder deactivationinstruction is sent after the engine is in the low-load area for a set time, so that the corresponding cylinders of the engine are controlled to be closed, output power of the remaining working cylinders is improved, the thermal cycle efficiency and load rate of the engine are further increased, nitrogen oxides are reduced, and the requirements of on-board emission regulations.
Description
technical field [0001] The invention relates to vehicle emission control, in particular to a control method and device for vehicle emission of diesel engines. Background technique [0002] With the development of social economy, the country pays more and more attention to environmental protection. In April 2016, 11 provinces in the east have implemented the national five emission standards for special vehicles (buses, sanitation, postal services). On July 1, the five-stage engine emission standard was implemented for heavy-duty diesel vehicles. [0003] The more severe test is that the regulatory department is actively promoting the on-board emissions of heavy-duty diesel vehicles (a way for heavy-duty diesel vehicles to carry out on-board emission testing during actual road driving) and fuel consumption regulations. Under the double challenge, manufacturers must provide more environmentally friendly and economical engines. [0004] At the same time, the country has impose...
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Login to View More IPC IPC(8): F02D13/06F02D41/00
CPCF02D13/06F02D41/0087F02D2200/101F02D2200/1002F02D2250/36
Inventor胡佳富杜鑫许力强
OwnerBEIJING FOTON CUMMINS ENGINE