Enrichment torque limiting control method and device and vehicle

Abstract

The invention provides an enrichment torque limiting control method and device and a vehicle. The enrichment torque limiting control method comprises the steps that the water temperature, the air inlet temperature, the exhaust temperature and the enrichment excess air coefficient of an engine are detected; when the water temperature is higher than the first temperature, the air inlet temperature is higher than the second temperature, and the excess air coefficient is larger than the preset value, the enrichment torque limiting mark is 1; or when the water temperature is higher than the first temperature, the air inlet temperature is higher than the second temperature, and the exhaust temperature is lower than the third temperature, the enrichment torque limiting mark is 1; otherwise, the enrichment torque limiting mark is 0; when the enrichment torque limiting mark is 1, a torque limiting coefficient is calculated by combining the first integral coefficient; and when the enrichment torque limiting mark is 0, the torque limiting coefficient is calculated by combining the second integral coefficient, and torque limiting is gradually quitted. According to the enrichment torque limiting control method for preventing engine oil dilution, the problem of engine oil dilution caused by engine ECU transition enrichment protection under special working conditions can be solved.

Description

technical field [0001] The present invention relates to the technical field of vehicles, in particular to a method, device and vehicle for enriching torque limiting control. Background technique [0002] With the increasingly stringent national emission regulations and fuel consumption regulations, and the continuous improvement of vehicle power performance requirements. Technologies such as small displacement of automobile engines, turbocharging and direct injection in cylinders are basically popularized. In particular, the popularity of small engine displacement and turbocharging technology has brought about a sharp rise in engine exhaust temperature. The exhaust temperature of gasoline engines has generally increased from about 800 degrees to about 1000 degrees. However, due to the constraints of material temperature characteristics, vehicle heat balance and other conditions, it is necessary to control the exhaust temperature, but after the engine hardware design is fina...

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Problems solved by technology

However, this patent is to use the oil dilution rate detection device to detect the oil dilution rate and input it to the ECU, so as to increase the temperature of the engine oil and realize the volatilization of diesel oil mixed in the engine oil, and it is only limited to diesel oil, which has certain limitations.

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