Land leveler control system with constant-speed cruising function and control method

Abstract

The invention discloses a land leveler control system with a constant-speed cruising function and a control method. According to the land leveler control system with the constant-speed cruising function and the control method, when a controller receives a gear shifting signal transmitted by a CAN bus handle through a CAN bus, a gear signal is transmitted to an electric-control gearbox, and the electric-control gearbox and a rear axle of a land leveler are connected, so that the land leveler is made to travel at the speed corresponding to the gear signal; and a brake signal, an accelerator pedal and a constant-speed cruising combined button are connected with an input port of the controller, the controller judges whether a constant-speed cruising mode needs to be started or not and judges the current target rotating speed by collecting data of the input port, and whether a constant-speed signal needs to be sent to an engine through the CAN bus to start the constant-speed cruising mode or not is determined according to a judgment result. According to the method, an operator does not need to pay attention to the degree of an accelerator or the gear of the gearbox in time during operation, so that the construction quality and efficiency are improved, and the burden of constructors is reduced; and the gear is fixed during constant-speed cruising, and thus the vehicle driving stability is guaranteed under the working condition that an external load is large.

Description

technical field [0001] This paper designs a motor grader control system and control method with constant speed cruise function, which belongs to the technical field of grader. Background technique [0002] The grader is mainly used for the construction of leveling roads and dams and other slopes. Its construction quality and construction efficiency have great advantages over ordinary construction techniques. The key factor reflecting its advantages is integrated operation, that is, the integration of all functions CAN line double-handle operation; and the quality of the vehicle driving control system is one of the key indicators to measure the performance of the grader. During the construction process, the machine depends on the vehicle's cruise control system to keep the vehicle at a relatively stable speed Work, in order to reduce the labor intensity of operators, while increasing the smoothness of the ground and the efficiency of construction. [0003] In the past, the d...

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Problems solved by technology

[0003] In the past, the driving control system of the motor grader used the pedal accelerator to control the engine speed, and then through the gear shifting of the gearbox, the vehicle speed was finally controlled. The process of vehicle construction; under this control method, the control accuracy of the engine speed and vehicle speed is low. When operating the shovel blade, the operator needs to pay attention to the size of the foot accelerator and the gear position of the gearbox in real time, which often affects the construction. quality and efficiency, and bring a greater burden to the construction personnel

[0004] Today, the throttle control method used in the commercial vehicle industry is torque control. The constant speed function is the driving speed of the vehicle, the engine speed is not fixed, and there is no limit control on the gear position of the vehicle gearbox. The control method and device are relatively standardized. Strong, but does not meet the characteristics and requirements of the working environment of the motor grader

Other vehicles with constant speed cruise function often use mechanical or semi-mechanical control methods. For the use of graders, the operation is not flexible enough and does not meet the construction conditions of graders.

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