Control method and device of electric supercharger, engine system and storage medium
An electric supercharger and control method technology, which is applied in machine/engine, electrical control, engine components, etc., can solve the problems of insufficient coordination between electric supercharger and exhaust gas turbocharger, unstable engine torque, etc. The effect of eliminating sudden increase in torque, ensuring the rationality of control, and ensuring stability
Active Publication Date: 2019-09-27
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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Problems solved by technology
[0005] The main purpose of the present invention is to provide a control method for an electric supercharger, aiming to solve the technical problem that the coordination between the electric supercharger and the exhaust gas turbocharger is not coordinated enough to cause the torque output by the engine to be unstable
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[0062] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0063] An embodiment of the present invention provides an engine system, referring to figure 1 , figure 1 It is a schematic diagram of the structure of the engine system.
[0064] Such as figure 1 As shown, the engine system includes an electronic control unit 100, such as an ECU (Electronic Control Unit), a communication bus 1002, an exhaust gas turbocharger 1003, a memory 1004 and an electric supercharger 1005, and the A control program running on the electronic control unit.
[0065] Wherein, the communication bus 1002 is used to realize connection and communication between these components, and the exhaust gas turbocharger 1003 is connected in series with the electric supercharger 1005 .
[0066] Those skilled in the art can understand that, figure 1 The structure shown in does not constitute a limitation to ...
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The invention provides a control method and device of an electric supercharger, an engine system and a storage medium. When the engine is in a working state, an electronic control unit obtains torque demands of the engine, corresponding supercharging pressure target values are calculated according to the torque demands, present supercharging pressure values of the engine are obtained, and pressure difference values between the supercharging pressure target values and the present supercharging pressure values are calculated; the torque demands are compared with a first threshold, and the pressure difference values are compared with a second threshold; and when the torque demands are higher than the first threshold, and the pressure difference values are higher than the second threshold, a pressure value of the electric supercharger is used for adjustment, and the present supercharging pressure values are controlled to reach the supercharging pressure target values, so that the electric supercharger is matched with a waste gas turbocharger of the engine to work, the torque output stability and the control rationality of the engine can be effectively guaranteed, and the torque sudden increment phenomenon caused by sudden intervention of the electric supercharger in work can be eliminated.
Description
technical field [0001] The invention relates to the technical field of automobile engines, in particular to a control method and device for an electric supercharger, an engine system and a storage medium. Background technique [0002] In the current automobile manufacturing technology, a naturally aspirated engine with a larger displacement has been replaced by a turbocharged engine with a smaller displacement of the same power ("reduced displacement") and a gearbox with a longer transmission ratio ( "Speed down") to reduce engine carbon emissions. [0003] However, the exhaust gas turbocharger has a transient torque delay phenomenon of low-speed boost pressure delay (turbo hysteresis). If you want to achieve the driving feeling of a naturally aspirated engine, you need to lower the gear and increase the shift speed. more fuel. Therefore, in the engine system, if an electric supercharger is added to cooperate with the exhaust gas turbocharger, the phenomenon of "turbo la...
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Login to View More IPC IPC(8): F02B39/10F02D41/00
CPCF02B39/10F02D41/0007
Inventor 颜丙辉陈玮钱海青武煌陈典龙倪银堤张香月赵光昌王云鹏
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD