Vehicle frictional work control method based on engine idling torque adaptation

Abstract

The invention discloses a vehicle frictional work control method based on engine idling torque adaptation. The vehicle frictional work control method comprises the following steps that information ofan engine and a gearbox is acquired, and the vehicle frictional work of a vehicle is calibrated, and a vehicle frictional work basic calibration table M4 based on cooling temperature and engine rotating speed is obtained; an idling control torque adjusting value M1 is acquired; idling torque self-adaptation judgment information is acquired, idling torque adaptation is enabled or not is judged, idling torque adaptation calculation is carried out, and an idling torque adaptation deviation value is obtained; and an idling torque adaptation adjusting value M7 is calculated and obtained; the finalvehicle frictional work M8 is calculated and obtained, the final vehicle frictional work M8 is equal to a vehicle frictional work basic value M4 plus the frictional work idling torque adaptation adjusting value M7, and the final frictional work M8 is adjusted according to cooling liquid temperature and electric appliance load changes. According to the vehicle frictional work control method based on engine idling torque adaptation, the control logic of idling loads is perfected, and the engine idling control stability is enhanced.

Description

technical field [0001] The invention belongs to the technical field of automobile engine control, and in particular relates to a vehicle friction work control method based on engine idle torque self-adaptation. Background technique [0002] With the continuous improvement of vehicle quality, customers have higher and higher requirements for vehicle NVH. Vehicle NVH is a comprehensive issue to measure the quality of automobile manufacturing. It gives the most direct and superficial feeling to car users. This item The index is an important index that many consumers pay attention to. The engine is one of the main excitation sources of the vehicle, and its idle speed stability can directly affect the vehicle noise and vehicle vibration. [0003] Measurement methods such as adding pressure sensors and chassis dynamometers and building engine benches (low-temperature vehicle benches, dynamometers) can effectively estimate the measured load, but additional vehicle development costs...

AI Technical Summary

Problems solved by technology

Using the above technical solution, the algorithm is simple, which meets the requirements of simplified control logic and accurate control; the existing mainstream control logic is simplified to a large extent, and it can reasonably and accurately adapt to engine manufacturing deviation, service wear, and aging errors engine idling torque deviation caused by other situations; but in this prior art, the judgment of torque self-adaptive adjustment is not perfect. The control torque accuracy will be reduced, and relevant conditions need to be introduced to limit the entry torque adaptive conditions; torque adaptive learning does not take into account engine friction resistance, gearbox load, and gearbox wear at different temperatures

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