An engine control method and device

Abstract

The engine control method and device provided by the present invention are applied in the field of automobile technology. After obtaining the PTO start command, the method controls the engine to run according to the target preset speed, and reaches the target operation corresponding to the target preset speed when the engine is running. After a long period of time, the engine is again controlled to run at the next target preset speed until all preset speeds are executed. Since the target preset speed selected each time is the lowest speed among all preset speeds to be executed at present, it can ensure that the engine speed gradually increases during the entire execution process, and the sum of the running time corresponding to each preset speed is The lubricating system gradually builds up the time corresponding to the oil pressure. Therefore, the problem of rapid increase in engine speed in a short period of time in the prior art will not occur. At the same time, it also allows the lubricating system to have enough time to build up the oil pressure, effectively avoiding engine scuffing. Ensure safe operation of the engine.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to an engine control method and device. Background technique [0002] Diesel engine PTO (Power-Take-Off) is a power take-off device, also known as a power take-off, which is used to output the power of the engine to other equipment other than the driving system of the car. It has a wide range of applications in the field of commercial vehicles. Unloaders, cement mixers, mining vehicles, etc. Since the power of the PTO comes directly from the engine, the control process of the PTO is actually the process in which the ECU (Electronic Control Unit, trip computer) controls the operation of the engine. [0003] Under the condition of engine cold start, the viscosity of oil is high, and it takes a long time for the lubrication system to build up enough oil pressure to provide sufficient lubrication for the engine. If the PTO function is used immediately after a successfu...

AI Technical Summary

Problems solved by technology

If the PTO function is used immediately after the engine is successfully cold started, the engine speed will increase rapidly in a short period of time, because the oil pressure in the lubrication system is insufficient at this time, and the engine piston is not sufficiently lubricated, which may cause engine scuffing and affect the normal use of the engine.

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