Walking inching control system of forklift loader

Abstract

The utility model relates to the technical field of forklift trucks, and discloses a forklift truck walking inching control system which comprises a foot brake pedal, an accelerator pedal, a walking and working operation handle, an engine ECU and a vehicle control unit VCU. The engine ECU and the vehicle control unit VCU are connected through a CAN bus. The VCU reads the current engine torque load percentage sent by an engine ECU through a CAN bus; and the VCU monitors the current torque load percentage of the engine in real time. The torque load percentage of the engine is read and monitored in real time through the ECU and the VCU, the rotating speed of the engine can be automatically and timely adjusted, it is guaranteed that walking inching and a hydraulic system of a working device are smoothly and efficiently carried out, the operation difficulty can be lowered, and the energy consumption of the engine is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of forklift technology, and in particular to a forklift travel inch advance control system. Background Technology

[0002] Traditional telescopic forklifts use simultaneous pressing of the accelerator pedal and foot brake pedal to complete operations when traveling and working with the forks or bucket.

[0003] When the accelerator pedal and brake pedal travel are mismatched, the engine may not reach sufficient speed, leading to overload and stalling. Furthermore, the forklift's travel inch control will affect the normal operation of the hydraulic system of the working device. The operation is complex and requires a high level of skill from the forklift operator, while also resulting in high engine energy consumption. Utility Model Content

[0004] The purpose of this invention is to provide a forklift travel inch-by-inch control system. By reading and monitoring the engine torque load percentage in real time through the ECU and VCU, the engine speed can be automatically and timely adjusted to ensure the smooth and efficient operation of the travel inch-by-inch and the hydraulic system of the working device. This reduces the difficulty of operation and effectively reduces engine energy consumption.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A forklift travel inch control system includes a foot brake pedal, an accelerator pedal, a travel and work operation handle, an engine ECU, and a vehicle control unit (VCU).

[0007] The engine ECU and the vehicle control unit (VCU) are connected via a CAN bus.

[0008] The vehicle control unit (VCU) reads the current torque load percentage of the engine from the engine ECU via the CAN bus;

[0009] The vehicle control unit (VCU) monitors the current torque load percentage of the engine in real time.

[0010] The present invention is further configured such that: the torque load percentage is the ratio of the current torque load of the engine at the same speed to the torque load corresponding to the engine speed-torque curve.

[0011] The present invention is further configured such that when the current torque load percentage is greater than 90%, the vehicle controller sends a speed command to the engine ECU via the CAN bus to control the engine to accelerate, reduce the torque load percentage, and prevent the engine from stalling.

[0012] When the current load torque percentage is less than 70%, the vehicle controller sends a speed command to the engine ECU via the CAN bus to control the engine to decelerate and reduce engine energy consumption.

[0013] When the front load torque percentage is greater than or equal to 70% and less than or equal to 90%, the vehicle controller sends a speed command to the engine ECU via the CAN bus to keep the engine speed unchanged.

[0014] The outstanding effect of this utility model is:

[0015] Compared with existing technologies, by reading and monitoring the engine torque load percentage in real time through the ECU and VCU, the engine speed can be automatically and timely adjusted to ensure the smooth and efficient operation of the travel inch advance and the hydraulic system of the working device, which can reduce the difficulty of operation and effectively reduce engine energy consumption. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is a graph showing the engine's speed-torque curve.

[0018] Figure 3 This is the control flowchart for this system.

[0019] Attached reference numerals: 1. Foot brake pedal; 2. Accelerator pedal; 3. Travel and work operation handle. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0021] The following is for reference Figures 1 to 3 The embodiments of this utility model are described below:

[0022] A forklift travel inch advance control system, such as Figure 1 As shown, it includes a foot brake pedal 1, an accelerator pedal 2, a travel and work operation handle 3, an engine, an engine ECU, and a vehicle control unit (VCU) (not shown in the figure).

[0023] The engine ECU and the vehicle control unit (VCU) are connected via a CAN bus.

[0024] The vehicle control unit (VCU) reads the current torque load percentage of the engine from the engine ECU via the CAN bus;

[0025] The vehicle control unit (VCU) monitors the current torque load percentage of the engine in real time.

[0026] Comparison Figure 2 The speed-torque curve shown indicates that the torque load percentage is the ratio of the current torque load of the engine at the same speed to the torque load corresponding to the engine speed-torque curve.

[0027] Control process such as Figure 3 As shown, when the current torque load percentage is greater than 90%, the vehicle controller sends a speed command to the engine ECU via the CAN bus to control the engine to accelerate, for example, to accelerate to the torque load percentage of around 80%, and then reduce the torque load percentage to prevent the engine from stalling.

[0028] When the current load torque percentage is less than 70%, the vehicle controller sends a speed command to the engine ECU via the CAN bus to control the engine to decelerate, for example, to reduce the torque load percentage to around 80%, thereby reducing engine energy consumption.

[0029] When the front load torque percentage is greater than or equal to 70% and less than or equal to 90%, the vehicle controller sends a speed command to the engine ECU via the CAN bus to keep the engine speed unchanged.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A forklift travel inch-by-inch control system, characterized in that: This includes the foot brake pedal, accelerator pedal, travel and work operation handles, engine ECU, and vehicle control unit (VCU); The engine ECU and the vehicle control unit (VCU) are connected via a CAN bus. The vehicle control unit (VCU) reads the current torque load percentage of the engine from the engine ECU via the CAN bus; The vehicle control unit (VCU) monitors the current torque load percentage of the engine in real time. The torque load percentage is the ratio of the current torque load of the engine at the same speed to the torque load corresponding to the engine speed-torque curve.

2. The forklift travel inch-by-inch control system according to claim 1, characterized in that: When the current torque load percentage is greater than 90%, the vehicle controller sends a speed command to the engine ECU via the CAN bus to control the engine to accelerate, reduce the torque load percentage, and prevent the engine from stalling.

3. The forklift travel inch-by-inch control system according to claim 1, characterized in that: When the current load torque percentage is less than 70%, the vehicle controller sends a speed command to the engine ECU via the CAN bus to control the engine to decelerate and reduce engine energy consumption.

4. The forklift travel inch-by-inch control system according to claim 1, characterized in that: When the front load torque percentage is greater than or equal to 70% and less than or equal to 90%, the vehicle controller sends a speed command to the engine ECU via the CAN bus to keep the engine speed unchanged.

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