Control method and system of electronic supercharger of vehicle, and vehicle
A technology of electronic supercharger and control method, applied in electrical control, engine control, fuel injection control, etc., can solve problems such as insufficient exhaust gas energy, acceleration hysteresis, and impact on acceleration performance, so as to improve acceleration performance, improve driving experience, The effect of eliminating the problem of acceleration lag
Active Publication Date: 2020-07-28
GREAT WALL MOTOR CO LTD
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Problems solved by technology
But this requires a process, for example: when the vehicle is accelerating rapidly, the exhaust energy of the engine in the initial stage of rapid acceleration is not enough in several working cycles, and it cannot effectively drive the turbocharger to reach the expected speed, resulting in acceleration hysteresis and affecting Acceleration performance
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[0031] 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.
[0032] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0033] figure 2 is a flow chart of a control method for an electronic supercharger according to an embodiment of the present invention.
[0034] Before describing the control method of the electronic supercharger of the vehicle according to the embodiment of the present invention, the vehicle is firstly described, the vehicle includes an engine system, and the engine system includes a description, such as figure 1 As shown, the engine system includes an electronic supercharger 1, a turbocharger 2 and an engine 3, wherein the exhaust part of the engine 3 is connected with the turbocharger 2, and the electronic supercharger 1 is connected with the intake part of the engine 3 , In additi...
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The invention provides a control method and system for an electronic supercharger of a vehicle and the vehicle. The control method comprises the steps of acquiring needed torque of an engine and obtaining target air inflow of the engine according to the needed torque; determining exhaust energy according to target thermodynamics correction factors and exhaust temperature and exhaust pressure of the engine; determining the duty ratio opening degree of an exhaust gas bypass valve of a turbosuperchager according to the exhaust energy and the target air inflow, and determining turbine lag time, required to reach the needed target air inflow of the turbosuperchager according to the duty ratio opening degree and the exhaust energy; and determining the operation rotating speed and operation time of the electronic supercharger according to the turbine lag time and the target air inflow so that the electronic supercharger can be controlled. The method can effectively promote the acceleration performance of the vehicle, and thus driving experience is promoted.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to a control method and system for an electronic supercharger of a vehicle, and a vehicle. Background technique [0002] At present, the engine of the vehicle is supercharged by means of a turbocharger, which can improve the acceleration performance of the vehicle to a certain extent. However, when the vehicle is accelerating, the turbocharger needs to use the high-temperature and high-pressure exhaust gas from the engine to drive the turbocharger. Turbo, which in turn supercharges the engine. But this requires a process, for example: when the vehicle is accelerating rapidly, the exhaust energy of the engine in the initial stage of rapid acceleration is not enough in several working cycles, and it cannot effectively drive the turbocharger to reach the expected speed, resulting in acceleration hysteresis and affecting Accelerate performance. Contents of the invention [0003]...
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IPC IPC(8): F02B39/16F02B39/10F02D23/00F02D41/00F02B37/04
CPCF02B37/04F02B39/10F02B39/16F02D41/0007Y02T10/12
Inventor 崔亚彬赵伟博王帅
Owner GREAT WALL MOTOR CO LTD