Work vehicle

• US 10,543,843 B2
• Filed: 10/15/2015
• Issued: 01/28/2020
• Est. Priority Date: 10/16/2014
• Status: Active Grant

• Current Assignee: Yanmar Power Technology Co., Ltd.
• Original Assignee: Yanmar Company Limited (Yanmar Holdings Co., Ltd.)
• Inventors: Miwa, Toshiyuki, Ogura, Kouhei
• Primary Examiner(s): Estremsky, Sherry L
• Application Number:
  US15/518,999
• Publication Number:
  US 20170240175A1
• Time in Patent Office: 1,566 Days
• CPC Class Codes: B60K 20/00 Arrangement or mounting of change-speed gearing control devices in vehicles movable cabs having special adaptations of vehicle control devices B62D33/06; such control devices per se F16H
• CPC Class Codes: B60K 20/04 floor mounted
• CPC Class Codes: B60K 20/08 Dashboard means
• CPC Class Codes: B60K 2360/111 for controlling multiple devices
• CPC Class Codes: B60K 2360/128 Axially displaceable input devices for instruments
• CPC Class Codes: B60K 2360/1438 Touch screens
• CPC Class Codes: B60K 2360/172 Driving mode indication
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 35/10 Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor
• CPC Class Codes: B60K 35/20 Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
• CPC Class Codes: B60K 35/28 characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver
• CPC Class Codes: B60W 2300/152 Tractors
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 2540/14 Clutch pedal position
• CPC Class Codes: B60W 2540/16 Ratio selector position
• CPC Class Codes: B60W 2720/10 Longitudinal speed
• CPC Class Codes: B60W 2720/106 Longitudinal acceleration
• CPC Class Codes: B60W 30/182 Selecting between different operative modes, e.g. comfort and performance modes
• CPC Class Codes: B60W 50/10 Interpretation of driver requests or demands
• CPC Class Codes: B60Y 2200/221 : Tractors
• CPC Class Codes: F16H 2061/6604 : Special control features generally applicable to continuously variable gearings
• CPC Class Codes: F16H 47/02 : the fluid gearing being of the volumetric type
• CPC Class Codes: F16H 59/04 : Ratio selector apparatus
• CPC Class Codes: F16H 59/54 : dependent on signals from the brakes, e.g. parking brakes
• CPC Class Codes: F16H 61/02 : characterised by the signals used for shift actuators F16H61/28, for continuously variable gearings F16H61/66
• CPC Class Codes: F16H 61/40 : hydrostatic

Abstract

This work vehicle (tractor), which is provided with an engine and an accelerator pedal capable of changing the operational state of the engine, and is configured to be free to travel by means of an operation of the accelerator pedal by an operator, is equipped with a display near an operator'"'"'s seat, said display being configured to be capable of displaying a screen (travel customization screen) for selecting whether or not to allow travel in conjunction with the accelerator.

Claims

1. A work vehicle comprising:

an engine;

a continuously variable transmission configured to convert rotational driving force from the engine, the continuously variable transmission having an operation state changeable for changing a speed of the work vehicle starting and travelling; and

an operation control device comprising a brake operation device; and

wherein;

an acceleration characteristic is adjustable for a case where the work vehicle starts traveling or a traveling speed is changed by operating the operation control device; and

the acceleration characteristic is adjustable for a case where the work vehicle is started by operating the brake operation device.

2. The work vehicle according to claim 1, wherein:

the operation control device further comprises a clutch operation device; and

the acceleration characteristic is also adjustable for a case where the work vehicle is started traveling by operating the clutch operation device.

3. The work vehicle according to claim 1, wherein:

the operation control device further comprises a forward-backward traveling switching operation device, and

the acceleration characteristic is also adjustable for a case where the work vehicle is started traveling by operating the forward-backward traveling switching operation device.

4. The work vehicle according to claim 1, wherein:

the operation control device further comprises a shift operation device, and

the acceleration characteristic is also adjustable for a case where the work vehicle is started traveling by operating the shift operation device.

5. The work vehicle according to claim 1, wherein:

the operation control device further comprises a shift operation device; and

the acceleration characteristic is also adjustable for a case where the traveling speed is changed by operating the shift operation device.

6. The work vehicle according to claim 1, further comprising:

a display disposed near a seat for an operator; and

wherein the display is capable of displaying a screen for adjusting the acceleration characteristic.

7. The work vehicle according to claim 6, wherein:

the operation control device includes a shift operation device; and

the display is capable of displaying a screen for adjusting the acceleration characteristic for each operated position of the shift operation device.

8. The work vehicle according to claim 6, wherein the display is capable of displaying a slide bar slidable toward one end side for achieving a slower acceleration characteristic and toward another end side for achieving a quicker acceleration characteristic.

9. The work vehicle according to claim 1, further comprising:

an accelerator pedal with which an operational state of the engine is changeable;

wherein in the work vehicle capable of traveling with an operator operating the accelerator pedal, a display is disposed near a seat of an operator; and

wherein the display is capable of displaying a screen for selecting whether accelerator interlocked traveling is allowed.

10. The work vehicle according to claim 9, further comprising:

a transmission; and

a shift lever with which an operation state of the transmission is changeable,

wherein the display is capable of displaying the screen for selecting whether the accelerator interlocked traveling is allowed for each operated position of the shift lever.

11. The work vehicle according to claim 9, wherein switching for selecting not to allow the accelerator interlocked traveling is not able to be performed on the display while the work vehicle is traveling.

12. The work vehicle according to claim 1, further comprising:

a brake pedal with which a braking device provided to a traveling unit is operated;

a depression amount detection unit configured to detect a depression amount of the brake pedal;

a main clutch pedal with which a main clutch is operated for connecting and disconnecting power in a middle of a power transmission path between the engine and the traveling unit;

a depression amount detection unit configured to detect a depression amount of the main clutch pedal; and

a controller configured to perform deceleration with the continuously variable transmission in accordance with the depression amount of the brake pedal or the main clutch pedal.

13. The work vehicle according to claim 12, wherein the controller is configured to perform, when a value detected by the depression amount detection unit for the brake pedal or the main clutch pedal exceeds a first setting value, speed change with the continuously variable transmission for achieving a vehicle speed corresponding to the depression amount, and to make the work vehicle travel at a creeping speed when the value is larger than a second setting value and smaller than a value at a maximum depression position.

14. The work vehicle according to claim 12, wherein the controller is configured to prioritize, when an accelerator pedal and an accelerator lever are both operated, an operation on the brake pedal.

15. A work vehicle comprising:

an engine;

a continuously variable transmission configured to convert rotational driving force from the engine, the continuously variable transmission having an operation state changeable for changing a speed of the work vehicle starting and travelling;

an operation control device, wherein an acceleration characteristic is adjustable for a case where the work vehicle starts or a traveling speed is changed by operating the operation control device;

an accelerator pedal with which an operational state of the engine is changeable, the work vehicle capable of traveling based on operation of the accelerator pedal; and

a display is disposed near a seat of an operator and capable of displaying a screen for selecting whether accelerator interlocked traveling is allowed.

16. The work vehicle according to claim 15, further comprising:

a transmission; and

a shift lever with which an operation state of the transmission is changeable; and

wherein the display is further capable of displaying the screen for selecting whether the accelerator interlocked traveling is allowed for each operated position of the shift lever.

17. The work vehicle according to claim 15, wherein switching for selecting not to allow the accelerator interlocked traveling is not able to be performed on the display while the work vehicle is traveling.

18. A work vehicle comprising:

an engine;

a continuously variable transmission configured to convert rotational driving force from the engine, the continuously variable transmission having an operation state changeable for changing a speed of the work vehicle starting and travelling;

an operation control device, wherein an acceleration characteristic is adjustable for a case where the work vehicle starts or a traveling speed is changed by operating the operation control device;

a brake pedal with which a braking device provided to a traveling unit is operated;

a depression amount detection unit configured to detect a depression amount of the brake pedal;

a main clutch pedal with which a main clutch is operated for connecting and disconnecting power in a middle of a power transmission path between the engine and the traveling unit;

a depression amount detection unit configured to detect a depression amount of the main clutch pedal; and

a controller configured to perform deceleration with the continuously variable transmission in accordance with the depression amount of the brake pedal or the main clutch pedal.

19. The work vehicle according to claim 18, wherein the controller is configured to perform, when a value detected by the depression amount detection unit for the brake pedal or the main clutch pedal exceeds a first setting value, speed change with the continuously variable transmission for achieving a vehicle speed corresponding to the depression amount, and to make the work vehicle travel at a creeping speed when the value is larger than a second setting value and smaller than a value at a maximum depression position.

20. The work vehicle according to claim 18, wherein the controller is configured to prioritize, when an accelerator pedal and an accelerator lever are both operated, an operation on the brake pedal.