Engine supercharge control method and device

Abstract

The invention discloses an engine supercharge control method and a device. The method comprises the steps of: (1) acquiring the rotating speed and the torque of an engine in real time; (2) judging if the rotating speed of the engine is in a first rotating speed range; (3) if so, acquiring a pressure value P1 in an outlet of an air filter and a pressure value P3 in an outlet of a turbocharger; (4) judging if the P3 is equal to n*P1; (5) if not, calculating the actual pressure change rate in the outlet of the turbocharger in the unit time; and (6) obtaining a calibrated pressure value P in the outlet of the turbocharger and calculating a theoretical pressure change rate according to the rotating speed signal and the torque of the engine if the actual pressure change rate is unequal to 0; and opening an electronic supercharger if the pressure value P3 in the outlet of the turbocharger is lower than the calibrated pressure value P and the actual pressure change rate is lower than the theoretical pressure change rate. The method effectively enhances the dynamic response time and the acceleration performance of whole vehicle.

Description

technical field [0001] The invention relates to the technical field of engine boosting, in particular to an engine boosting control method and device. Background technique [0002] The engine air intake system plays a key role in engine performance. The engine air intake system provides sufficient fresh air for the engine to meet the needs of engine combustion, so that the engine can perform better. As China's fuel consumption regulations become more and more stringent, in order to meet China's fourth-stage fuel consumption requirements, engine supercharging and miniaturization has become a trend (using supercharged small-displacement engines instead of the original large-displacement natural intake engine), that is, by reducing the engine displacement to achieve the purpose of reducing fuel consumption. [0003] The small-displacement engine achieves the dynamic performance of a large-displacement naturally aspirated engine through the use of turbocharging technology. Tu...

AI Technical Summary

Problems solved by technology

Due to the lack of low-end torque, this directly leads to insufficient engine torque during the period from the moment the engine is just started to when the supercharger is fully involved in work, such as Figure 4 As shown, if the torque increases slowly, the acceleration performance of the vehicle will be poor

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