System and method for controlling engine of road roller

Abstract

The invention relates to a system and a method for controlling an engine of a road roller. The system comprises a load detecting unit, a rotating speed setting unit and an ECU (Electronic Control Unit), wherein the load detecting unit is used for detecting the overall load of the road roller and generating a target torque according to the overall load; the rotating speed setting unit is used for setting the rotating speed of the engine as a preset rotating speed; the ECU is used for calculating a preset torque according to the preset rotating speed, comparing the target torque with the preset torque, controlling the rotating speed of the engine to be smaller than the preset rotating speed if the target torque is larger than the preset torque, and controlling the rotating speed of the engine to be larger than the preset rotating speed if the target torque is smaller than the preset torque. By the system disclosed by the invention, the ECU is used for regulating the rotating speed of the engine of the road roller and has the advantages of high precision and quick response in comparison with a mechanical structure; therefore, the road roller is enabled to rapidly stabilize the rotating speed when the load is changed, and thus the compaction effect on the road surface is guaranteed.

Description

technical field [0001] The invention relates to the technical field of road rollers, in particular to an engine control system of a road roller and an engine control method of a road roller. Background technique [0002] Road rollers are widely used in filling and compaction operations of high-grade highways, railways, airport runways, dams, stadiums and other large-scale engineering projects. In order to ensure the compaction effect of road rollers, the engine speed fluctuations are required to be as small as possible or even constant speed output. [0003] The engine of the existing road roller, in the process of compaction or encountering different working conditions, when the load changes suddenly or the vibration is turned on, the torque output by the engine cannot automatically adapt to the load change itself. Therefore, in order to ensure the stability of the speed, the engine must rely on The governor adjusts. [0004] The governor is mainly a mechanical structure, ...

AI Technical Summary

Problems solved by technology

Because the existing governors all adopt mechanical structure, there are disadvantages such as poor control precision, inaccurate adjustment of fuel injection volume, slow response of mechanical structure, etc., which will lead to long fluctuation time of engine speed, unstable engine speed of road roller for a long time, and After the load changes, the original set value cannot be reached, thus affecting the compaction effect of the road roller

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