Engine delay stalling control method and engineering vehicle

Abstract

The invention relates to the technical field of engine assemblies and particularly discloses an engine delay stalling control method. The engine delay stalling control method comprises the steps thatan ignition key is switched from the on position to the off position; a controller obtains the temperature T1 at an SCR inlet, and compares T1 with the first presetting temperature T100; if T1 is greater than or equal to T100, the actual angle alpha of a butterfly valve is obtained, and if alpha is equal to 0 degree, the difference value between the oil coolant temperature T2 and the oil temperature T3 is taken and is compared with the second presetting temperature T200; if the difference value is not greater than T200, the controller compares T2 and the third presetting temperature T300; andif the difference value is greater than T200, an engine is controlled to be stalled after being idled by the operation time t1. In the method, the temperature at the SCR inlet and the angle of the butterfly valve can reflect whether the post-processing state of a complete machine is normal, the difference value between the oil coolant temperature and the oil temperature can reflect whether a cooling system of the engine is normal, the oil coolant temperature reflects the working condition before the stalling movement of the engine, and the method is fitter for the actual working condition of the engine.

Description

technical field [0001] The invention relates to the field of engine assemblies, in particular to an engine delay flameout control method and an engineering vehicle. Background technique [0002] Construction vehicles equipped with diesel engines, especially high-horsepower models, such as bulldozers, loaders, etc., have clear requirements: after the engine has been working under heavy load for a long time, it is recommended to run at idle speed for 3 to 5 minutes, and it is forbidden to turn off the engine directly. For a low-emission diesel engine with an added post-processor, the requirements are even more stringent, not only must it run at idle for a few minutes, but also continue to supply power for 40 to 120 seconds after the engine is turned off. The main reason is: After the high-horsepower bulldozer works for a long time, the temperature of the machine body and the post-processing metering module and supply module is high. Immediately turning off the engine will easi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a delayed engine flameout control method to solve the problem in the prior art that the diesel engine is delayed in flameout after a long time of operation only through the cooling liquid temperature, which cannot objectively and accurately reflect the state of the entire diesel engine oil, and the control method is not accurate. fine question

Images