Engine system, calculation method of actual fresh air volume and vehicle
An engine system and air flow meter technology, applied in engine control, engine components, machines/engines, etc., can solve problems such as large gaps in fresh air volume, benefit emissions and fuel consumption, ensure equivalence ratio combustion, and accurately control EGR rate effect
Active Publication Date: 2022-04-22
GREAT WALL MOTOR CO LTD
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Problems solved by technology
[0007] Precise control of the actual EGR rate entering the cylinder requires the ability to calculate the real fresh air volume, but in related technologies, there is a large gap between the calculation structure of the fresh air volume and the actual value
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Embodiment Construction
[0032] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0033] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0034] Such as figure 1 As shown, the engine system of the embodiment of the present invention includes a low-pressure EGR system, and the engine system includes: a compressor 2, an air intake intercooler 3, a cylinder, a turbine 9, a catalytic converter 10, an EGR pipeline, and an ECU.
[0035] The inlet end of the compressor 2 is provided with a main air intake pipe, the main air intake pipe is provided with a first air flow meter 1, the outlet end of the compressor 2 is connected with the inlet end of the air intake intercooler 3, and the outlet of the air intake intercooler 3 A second air flow meter 4, a throttle valve 5, and an intake pressure sensor 6 are sequentially arranged be...
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An engine system, a method for calculating an actual amount of fresh air, and a vehicle. The engine system includes: a first air flow meter, a second air flow meter, an intake air pressure sensor, an oxygen sensor, and an EGR valve. Both ends of the EGR valve are connected with pressure Differential sensor; the first air flow meter, the second air flow meter, the intake pressure sensor, the EGR valve, and the differential pressure sensor are all communicated with the ECU; wherein the ECU includes a readable storage medium storing the first computer program, and the first computer The program is used according to the flow m1 detected by the first air flow meter, the flow m2 detected by the second air flow meter, the pressure p detected by the intake pressure sensor, the opening degree of the EGR valve, the pressure difference ΔP detected by the pressure difference sensor, the oxygen sensor The detected oxygen content calculates the actual amount of fresh air in the engine cylinders. The engine system of the present invention can accurately calculate the fresh air volume of the engine with the low-pressure EGR system, ensures the equivalent ratio combustion of the engine, and is beneficial to emission and fuel consumption.
Description
technical field [0001] The present invention relates to the technical field of engines, in particular, to an engine system, a vehicle with the engine system, a method for calculating the actual amount of fresh air in the engine system, and a vehicle with the calculation method. Background technique [0002] Environmental issues, energy crisis, stringent emission and fuel consumption regulations have brought severe challenges to the internal combustion engine industry. Reducing fuel consumption and reducing emissions are the two core issues at present. [0003] Under the above background, various car companies and research institutes have proposed that the low-pressure EGR system be applied to gasoline engines. The exhaust gas is drawn out from the catalytic converter and introduced before the intake air intercooler, and the cooled exhaust gas is introduced into the cylinder to reduce the temperature of the working fluid in the cylinder. And the specific heat ratio, reduce t...
Claims
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IPC IPC(8): F02D41/14F02D41/18F02D21/08F02M26/06F02M26/47
CPCF02D41/0052F02D41/0072F02D41/1454F02D41/18F02M26/06F02M26/47F02D2200/04F02D2021/083
Inventor 崔亚彬李树会宋栋来刘义佳张士伟关松
Owner GREAT WALL MOTOR CO LTD