Pure electric tractor cruise control system

Abstract

The utility model provides a cruise control system of a pure electric tractor, which comprises a cruise function switch, a foot accelerator and a hand accelerator, the cruise function switch, the foot accelerator and the hand accelerator are communicated with a whole vehicle control module, and the whole vehicle control module is communicated with a driving motor control unit; a cruise control system can be optimized, the problem that the vehicle speed set by a hand accelerator is associated with the PTO output rotating speed when the tractor cruises at present is solved, meanwhile, full-speed cruise can be achieved under the condition that safety is guaranteed through the cruise control function, and a better working effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tractor field, in particular to a kind of pure electric tractor cruise control system. BACKGROUND

[0002] Traditional tractor is generally powered by diesel engine, and a multi-gear gearbox is configured according to power demand, speed demand, etc. to adapt to different working conditions. The output shaft of the engine is mechanically connected to the gearbox and PTO output device through a transfer case. When entering the working condition, a working gear is set, and then the engine speed is controlled by the hand throttle, and the engine speed or working vehicle speed is changed by adjusting the hand throttle position.

[0003] Since the engine and PTO output device are hard connected through mechanical structure, when adjusting the hand throttle position, the PTO output speed changes with the position signal of the hand throttle, affecting the working effect of the PTO.

[0004] Therefore, there is an urgent need for a pure electric tractor cruise control system to solve the above problems. SUMMARY

[0005] The utility model aims to provide a kind of pure electric tractor cruise control system to solve the problems existing in the prior art.

[0006] To achieve the above object, the utility model provides the following scheme:

[0007] The utility model provides a kind of pure electric tractor cruise control system, including cruise function switch, foot throttle and hand throttle, the cruise function switch, the foot throttle and the hand throttle all establish communication with whole car control module, and the whole car control module establishes communication with drive motor control unit.

[0008] Preferably, the whole car control module also establishes communication with cruise fault detection module, brake pedal, hand brake and gear control module.

[0009] Compared with the prior art, the utility model has the following beneficial technical effects:

[0010] The utility model provides a kind of pure electric tractor cruise control system, including cruise function switch, foot throttle and hand throttle, the cruise function switch, the foot throttle and the hand throttle all establish communication with whole car control module, and the whole car control module establishes communication with drive motor control unit;The cruise system can be optimized, the problem that the vehicle speed set by hand throttle is associated with PTO output speed when the current tractor cruises is solved, and the cruise control function can realize full-speed cruise under the condition of guaranteeing safety, to achieve better working effect. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0012] Figure 1 A pure electric tractor cruise control system logic diagram is provided. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0014] The purpose of the present application is to provide a pure electric tractor cruise control system to solve the problems in the prior art.

[0015] In order to make the above purposes, features and advantages of the present application more apparent and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0016] Embodiment 1:

[0017] The present embodiment provides a pure electric tractor cruise control system, which comprises a cruise function switch, a foot throttle and a hand throttle. The cruise function switch, the foot throttle and the hand throttle all establish communication with a vehicle control module. The vehicle control module establishes communication with a drive motor control unit.

[0018] As an implementation mode, the vehicle control module also establishes communication with a cruise fault detection module, a brake pedal, a hand brake and a gear control module.

[0019] When the whole machine is powered on, as shown in the figure, it enters an initialization state. The cruise enable allowed conditions are no cruise related faults, the brake pedal is not stepped on, the hand brake is not pulled up, the gear is not in neutral, the cruise function switch is turned on, and all the above conditions are met. Cruise enable conditions are allowed. If the opening degree signal of the hand throttle is less than a set value C1 at this time, it enters an enable ready state. Figure 1

[0020] ​After entering the cruise enable ready state, if the opening degree signal of the hand throttle is greater than a set value C2, the cruise active state is entered, after entering the cruise active state, the vehicle control module converts the electric signal of the hand throttle into a required vehicle speed value, and then calculates the required rotating speed of the drive motor according to the reduction ratio of the whole machine; the vehicle control module sends a torque instruction to the drive motor control unit according to the set required rotating speed of the drive motor, and adjusts the required torque in real time according to the real-time rotating speed fed back by the drive motor control unit, so that the vehicle speed is kept at the set vehicle speed.

[0021] After entering the cruise active state, if the vehicle control module detects that the foot throttle is stepped on, and the torque control requirement converted by the electric signal of the foot throttle is greater than the required torque for maintaining the vehicle speed in the current cruise active state, the cruise takeover state is entered, at this time, the drive motor control unit responds to the torque requirement calculated by the electric signal of the foot throttle; when the required torque calculated by the electric signal of the foot throttle is less than the required torque of the hand throttle in the cruise state, the cruise active state is returned again, and the drive motor control unit responds to the torque requirement in the cruise active state.

[0022] In any state, as long as the cruise enable condition is not allowed, that is, the vehicle control module detects any fault affecting the cruise, the brake pedal is stepped on, the hand brake is pulled up, the cruise function switch is turned off, the gear is in neutral, and any of the above signals is detected, the current state is directly exited and returned to the initialization state. To re-enter the cruise state, the cruise enable condition must be restored to the allowed state, and the hand throttle knob must be reset.

[0023] The pure electric tractor cruise control system provided by the utility model can analyze the driving intention of the driver through the hand throttle, the foot throttle, the brake pedal and the like, control the whole machine to travel at a fixed speed, and adjust the driving force of the whole machine in real time when the external load changes, so as to ensure constant vehicle speed. The cruise system can be optimized, the problem that the vehicle speed set by the hand throttle is related to the PTO output rotating speed during the cruise of the tractor is solved, the cruise control function can realize full-speed cruise under the condition of ensuring safety, and better working effect is achieved.

[0024] The principle and implementation mode of the utility model are described by applying specific examples, and the description of the above examples is only used for helping to understand the method and core idea of the utility model; meanwhile, according to the idea of the utility model, the specific implementation mode and application range will be changed by the general technical personnel in the field. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A pure electric tractor cruise control system characterized in that: The cruise function switch, the foot throttle and the hand throttle all establish independent communication with a vehicle control module, and the vehicle control module establishes independent communication with a drive motor control unit; The vehicle control module also establishes independent control communication with a cruise fault detection module, a brake pedal, a hand brake and a gear control module.

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