Control method and system for peristaltic walking of a shift compactor

Abstract

The application discloses a control method and system for peristaltic walking of a gear shift road roller, and the method comprises the following steps: after starting the peristaltic walking, the engine speed and the selected walking target speed are acquired; according to the engine speed and the selected walking target speed, the corresponding opening degree of the electronic clutch is controlled to realize the peristaltic walking of the gear shift road roller; meanwhile, the friction plate temperature of the electronic clutch is monitored in real time, and according to different temperature thresholds, the driver is given an alarm prompt or directly parked for processing. The application can realize short-time low-speed compaction in the static rolling working condition of the gear shift road roller and short-time low-speed compaction in the vibration working condition, reduce the working strength of the driver and improve the operation comfort; on the other hand, the system monitors the friction plate temperature of the electronic clutch in real time, and when the temperature is too high, an automatic alarm prompt or direct automatic parking is given, so that the electronic clutch is prevented from being burned due to the too long time in the half-clutch state, the working quality of the equipment is improved, and the use cost of the whole machine is reduced.

Description

Technical Field

[0001] This invention relates to a control method and system for the creeping movement of a shift roller, belonging to the field of engineering machinery technology. Background Technology

[0002] Mechanically driven single-drum rollers include conventional mechanically driven rollers and direct-shift rollers. The power transmission route of a conventional mechanically driven roller is engine, main clutch, gearbox, drive shaft, drive axle, and control system; the power transmission route of a direct-shift roller is engine, shock absorber, direct-shift gearbox, drive shaft, drive axle, and control system.

[0003] Direct shift rollers do not have a main clutch and can shift gears without cutting off power, outputting a stable speed at each gear. However, they cannot be used for compaction at low speeds. Traditional mechanically driven rollers, although they have a main clutch and can achieve low-speed compaction, require a higher level of skill from the operator, and the workload is greater when compacting at low speeds. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a control method and system for the creeping movement of a shift-gear road roller, solving the problem that direct-gear road rollers cannot travel at low speeds, and at the same time solving the problem that traditional road rollers require high operator skill and have high workload for low-speed compaction.

[0005] To achieve the above objectives, the present invention is implemented using the following technical solution:

[0006] In a first aspect, the present invention provides a control method for the creeping movement of a shift roller, comprising:

[0007] In response to receiving gear information from the direct-shift transmission, the engine speed and the selected target travel speed are obtained;

[0008] Based on the gear information, control the shift roller to creep along or to move according to the gear provided by the gear information;

[0009] The electronic clutch opening is adjusted according to the engine speed and the selected target travel speed;

[0010] Real-time monitoring of the friction plate temperature of the electronic clutch;

[0011] When the friction plate temperature of the electronic clutch reaches the first temperature threshold, the control shift roller outputs text and sound alarm reminders;

[0012] When the friction plate temperature of the electronic clutch reaches the second temperature threshold, the shift roller is automatically stopped.

[0013] Wherein, the first temperature threshold is lower than the second temperature threshold.

[0014] Furthermore, if the received gear information is gear 1, the shift roller is controlled to perform creeping movement.

[0015] If the received gear information is not gear 1, the control of the shift roller will not perform creeping movement, but will move according to the selected gear.

[0016] Furthermore, adjusting the electronic clutch opening based on the engine speed and the selected target travel speed includes:

[0017] If the selected target speed is greater than the dead zone value, the correspondence between the engine speed, the target speed, and the electronic clutch opening is determined, and the electronic clutch opening is adjusted according to the correspondence.

[0018] If the selected target speed is less than or equal to the dead zone value, the shift roller will not perform creeping movement, but will move according to the selected gear, without adjusting the electronic clutch opening.

[0019] Furthermore, if the selected target speed is greater than the dead zone value, determining the correspondence between the engine speed, the target speed, and the electronic clutch opening includes:

[0020] The input shaft speed of the direct shift gearbox is obtained based on the target walking speed.

[0021] The electronic clutch opening is determined based on the engine speed and the input shaft speed of the direct shift transmission.

[0022] Furthermore, the target walking speed is no greater than the maximum speed of the vehicle in normal first gear.

[0023] Furthermore, the engine speed is the vehicle's rated speed.

[0024] Furthermore, the dead zone value is set to 5% of the maximum walking target speed.

[0025] Secondly, the present invention provides a control system for the creeping movement of a shift roller, comprising:

[0026] Gear shift switch: Used to send gear position information;

[0027] Walking speed knob: Used to output the target walking speed;

[0028] Speed ​​sensor: used to collect engine speed;

[0029] Temperature sensor: Used to monitor the friction plate temperature of the electronic clutch in real time;

[0030] Controller: In response to receiving the gear information, acquire the engine speed and the target travel speed, and control the shift roller to creep or travel according to the gear provided by the gear information; and output text and sound alarm reminders when the friction plate temperature of the electronic clutch reaches a first temperature threshold; and output a stop command when the friction plate temperature of the electronic clutch reaches a second temperature threshold.

[0031] Alarm device: used to output text and sound alarm alerts;

[0032] Wherein, the first temperature threshold is lower than the second temperature threshold.

[0033] Furthermore, the system also includes a power transmission device; the power transmission device includes an engine, an electronic clutch, a direct-shift gearbox, a drive shaft, and a drive axle that transmit power in sequence.

[0034] Thirdly, the present invention provides a shift roller equipped with a control system for the creeping movement of the shift roller as described in the second aspect.

[0035] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0036] This invention provides a control method for the creeping movement of a shift-mode road roller. In response to receiving gear information from a direct-shift gearbox, the system acquires the engine speed and the selected target speed. Based on the gear information, it controls the shift-mode road roller to creep or move according to the gear provided by the gear information. The electronic clutch opening is adjusted according to the engine speed and the selected target speed, allowing the operator to operate the electronic clutch at ultra-low speeds in a slipping state, similar to using a foot-operated clutch in a traditional shift-mode road roller. This reduces operator workload and improves operational comfort. The system enables short-duration low-speed compaction in both static and vibratory conditions. Simultaneously, the system monitors the friction plate temperature of the electronic clutch in real time. When the friction plate temperature reaches a first temperature threshold, the system controls the shift-mode road roller to output a text and sound alarm. When the friction plate temperature reaches a second temperature threshold, the system controls the shift-mode road roller to automatically stop. It can protect the electronic clutch, preventing it from burning out due to prolonged semi-engaged state, thus improving the equipment's working quality and reducing the overall operating cost. Attached Figure Description

[0037] Figure 1 This is a schematic flowchart of a creeping travel control method for a shift roller provided in an embodiment of the present invention;

[0038] Figure 2This is another schematic flowchart of a method for controlling the creeping movement of a shift-gear road roller provided in an embodiment of the present invention;

[0039] Figure 3 This is a schematic flowchart of the clutch protection system in a creeping travel control method for a shift-type road roller provided in an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram illustrating the operating principle of a creeping travel control method for a shift roller provided in another embodiment of the present invention. Detailed Implementation

[0041] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0042] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0043] Example 1:

[0044] like Figures 1-3 As shown in the figure, this embodiment provides a control method for the creeping movement of a shift roller, including:

[0045] In response to receiving gear information from the direct-shift transmission, the engine speed and the selected target travel speed are obtained;

[0046] Based on the gear information, control the shift roller to creep along or to move according to the gear provided by the gear information;

[0047] The electronic clutch opening is adjusted according to the engine speed and the selected target travel speed;

[0048] Real-time monitoring of the friction plate temperature of the electronic clutch;

[0049] When the friction plate temperature of the electronic clutch reaches the first temperature threshold, the control shift roller outputs text and sound alarm reminders;

[0050] When the friction plate temperature of the electronic clutch reaches the second temperature threshold, the shift roller is automatically stopped.

[0051] Wherein, the first temperature threshold is lower than the second temperature threshold.

[0052] The engine speed is the vehicle's rated speed, and the selected target speed is no greater than the vehicle's maximum speed in normal first gear.

[0053] The step of receiving gear position information from a direct-shift transmission and obtaining the engine speed and the selected target travel speed includes:

[0054] If the received gear information is gear 1, then control the shift roller to perform creeping movement;

[0055] If the received gear information is not gear 1, the shift roller will not perform creeping movement and will move in the selected gear. In this case, the electronic clutch acts as a shock absorber, and gear shifting can be achieved without a clutch system.

[0056] If the selected target speed is greater than the dead zone value, the correspondence between the engine speed, the target speed, and the electronic clutch opening is determined, and the electronic clutch opening is adjusted according to the correspondence.

[0057] If the selected target speed is less than or equal to the dead zone value, the control roller will not perform creeping movement and will move according to the selected gear, without needing to adjust the electronic clutch opening. In this case, the electronic clutch acts as a shock absorber, allowing gear shifting without a clutch system. The conditions for activating creeping movement are that the direct-shift gearbox gear selector switch is set to gear 1, and the creeping speed knob has passed the dead zone value. The dead zone value is set to 5% of the maximum target speed to prevent driver error.

[0058] The step of determining the correspondence between the engine speed, the target speed, and the electronic clutch opening if the selected target speed is greater than the dead zone value includes:

[0059] The input shaft speed of the direct shift gearbox is obtained based on the target walking speed.

[0060] The electronic clutch opening is determined based on the engine speed and the input shaft speed of the direct shift transmission.

[0061] During use, the direct-shift gearbox can be set to different low-speed gears as needed, with each gear's speed lower than the normal driving speed. Rotate the gearbox shift switch to shift the direct-shift gearbox to first gear. Then, turn the creep speed knob to the desired speed value and past the dead zone. The machine will creep along, and the controller adjusts the opening of the electronic clutch. Creeping is achieved through a semi-slippery electronic clutch. If no creep speed is selected, the electronic clutch remains normally closed, ensuring continuous and normal power transmission.

[0062] Meanwhile, a temperature sensor monitors the friction plate temperature of the electronic clutch in real time, and two temperature alarm thresholds are set according to the characteristics of different electronic clutch friction plates. If the friction plate temperature of the electronic clutch exceeds the first temperature threshold, the controller activates the display alarm device to output text and sound alarm reminders, indicating that the friction plate temperature of the electronic clutch is too high and the machine needs to be stopped for cooling. If the friction plate temperature of the electronic clutch exceeds the second temperature threshold, the controller will automatically stop the shift roller to protect the electronic clutch friction plate and prevent the electronic clutch from burning out due to prolonged semi-engaged state, thereby improving the equipment's working quality and reducing the overall operating cost of the machine.

[0063] Example 2:

[0064] This embodiment provides a control system for the creeping movement of a shift-mode road roller. The system includes a controller and a temperature sensor, a gearbox shift switch, a throttle knob, a travel speed knob, a speed sensor, and an alarm device connected to the controller.

[0065] The gearbox shift switch is used to send gear information; the travel speed knob is used to output the target travel speed; the speed sensor is used to collect engine speed; the temperature sensor is used to monitor the friction plate temperature of the electronic clutch in real time; the alarm device is used to output text and sound alarm reminders; and the throttle knob is used to adjust engine speed.

[0066] The controller is used to respond to receiving the gear information, obtain the engine speed and the target travel speed, and control the shift roller to creep or travel according to the gear provided by the gear information; and to output a text and sound alarm reminder when the friction plate temperature of the electronic clutch reaches a first temperature threshold; and to output a stop command when the friction plate temperature of the electronic clutch reaches a second temperature threshold; wherein the first temperature threshold is lower than the second temperature threshold.

[0067] It should be noted that the system also includes a power transmission device; the power transmission device includes an engine, an electronic clutch, a direct-shift gearbox, a drive shaft, and a drive axle that transmit power in sequence; the electronic clutch is connected to a temperature sensor and a controller.

[0068] Example 3:

[0069] like Figure 4As shown in the figure, this embodiment provides a shift roller equipped with a creeping travel control system as described in Embodiment 2. This shift roller can automatically creep along its path, reducing the operator's workload and improving operational comfort. It can also monitor the friction plate temperature of the electronic clutch in real time. When the friction plate temperature is too high, it automatically alarms or automatically stops the machine, preventing the electronic clutch from burning out due to prolonged semi-engaged state. This improves the equipment's working quality and reduces the overall operating cost. It can achieve short-time low-speed compaction in both static and vibratory conditions.

[0070] The above description is only a preferred embodiment of the present invention. 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 invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A control method for shifting a road roller to peristaltic walking, characterized by, The method comprises: obtaining an engine speed and a selected walking target speed in response to receiving gear information from a direct shift gearbox; controlling the shift road roller to creep walk or to walk according to a gear provided by the gear information according to the gear information; adjusting an electronic clutch opening degree according to the engine speed and the selected walking target speed; monitoring a friction plate temperature of the electronic clutch in real time; controlling the shift road roller to output a text and sound alarm prompt when the friction plate temperature of the electronic clutch reaches a first temperature threshold; controlling the shift road roller to automatically stop when the friction plate temperature of the electronic clutch reaches a second temperature threshold; wherein the first temperature threshold is lower than the second temperature threshold; if the selected walking target speed is greater than a dead zone value, determining a corresponding relationship among the engine speed, the walking target speed and the electronic clutch opening degree, and adjusting the electronic clutch opening degree according to the corresponding relationship; if the selected walking target speed is less than or equal to the dead zone value, controlling the shift road roller not to perform the creep walk, and walking according to the selected gear, and not adjusting the electronic clutch opening degree; if the selected walking target speed is greater than the dead zone value, determining the corresponding relationship among the engine speed, the walking target speed and the electronic clutch opening degree, comprising: obtaining an input shaft speed of the direct shift gearbox according to the walking target speed; determining the electronic clutch opening degree according to the engine speed and the input shaft speed of the direct shift gearbox.

2. The control method of claim 1, wherein if the received gear information is gear 1, controlling the shift road roller to perform the creep walk; if the received gear information is not gear 1, controlling the shift road roller not to perform the creep walk, and walking according to the selected gear.

3. The control method of shifting the road roller to peristaltic walking according to claim 1, wherein The walking target speed is not greater than a maximum speed of the vehicle in gear 1.

4. The control method of shifting the road roller to peristaltic walking according to claim 1, wherein The engine speed is a rated speed of the vehicle.

5. The control method of shifting the road roller to peristaltic walking according to claim 1, wherein The dead zone value is set to 5% of a maximum walking target speed.

6. A control system for inching a shift motor grader, characterized by, The method comprises: a gearbox shift switch for sending gear information; a walking speed knob for outputting a walking target speed; a speed sensor for collecting an engine speed; a temperature sensor for monitoring a friction plate temperature of an electronic clutch in real time; a controller for obtaining the engine speed and the walking target speed in response to receiving the gear information, and controlling the shift road roller to creep walk or to walk according to a gear provided by the gear information according to the gear information; and for outputting a text and sound alarm prompt instruction when the friction plate temperature of the electronic clutch reaches a first temperature threshold, and outputting a stop instruction when the friction plate temperature of the electronic clutch reaches a second temperature threshold; an alarm device for outputting the text and sound alarm prompt; wherein the first temperature threshold is lower than the second temperature threshold; if the selected walking target speed is greater than a dead zone value, determining a corresponding relationship among the engine speed, the walking target speed and the electronic clutch opening degree, and adjusting the electronic clutch opening degree according to the corresponding relationship; if the selected walking target speed is less than or equal to the dead zone value, controlling the shift road roller not to perform the creep walk, and walking according to the selected gear, and not adjusting the electronic clutch opening degree. ​ If the selected walking target speed is greater than the dead zone value, the corresponding relationship between the engine speed, the walking target speed and the electronic clutch opening degree is determined, comprising: The direct shift gearbox input shaft speed is obtained according to the walking target speed; The electronic clutch opening degree is determined according to the engine speed and the direct shift gearbox input shaft speed.

7. The control system for shifting and traveling of a road roller according to claim 6, wherein The system further comprises a power transmission device; the power transmission device comprises an engine, an electronic clutch, a direct shift gearbox, a transmission shaft and a drive axle which transmit power in sequence.

8. A shift dozer characterized by, The control system for peristaltic walking of a shift road roller comprises a control system as claimed in any one of claims 6 to 7.

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