WORK VEHICLE AND CONTROL METHOD FOR WORK VEHICLE

• US 20160031448A1
• Filed: 07/30/2014
• Published: 02/04/2016
• Est. Priority Date: 07/30/2014
• Status: Active Grant

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: SAKAI, Katsuyuki
• Granted Patent: US 9,550,499 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60R 16/023 for transmission of signals between vehicle parts or subsystems
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/18 including control of braking systems
• CPC Class Codes: B60W 10/184 with wheel brakes
• CPC Class Codes: B60W 2050/0045 using databus protocols
• CPC Class Codes: B60W 2050/0075 Automatic parameter input, automatic initialising or calibrating means
• CPC Class Codes: B60W 2556/45 External transmission of data to or from the vehicle
• CPC Class Codes: B60W 50/02 Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
• CPC Class Codes: B60W 50/023 Avoiding failures by using redundant parts
• CPC Class Codes: B60W 50/035 Bringing the control units into a predefined state, e.g. giving priority to particular actuators
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G05B 2219/2616 Earth moving, work machine
• CPC Class Codes: G05B 9/02 electric
• CPC Class Codes: G05D 1/0055 with safety arrangements
• CPC Class Codes: G05D 1/0088 characterized by the autonomous decision making process, e.g. artificial intelligence, predefined behaviours using knowledge based models G06N5/00

Abstract

A work vehicle includes: a first control system that controls a traveling of a work vehicle; a second control system that controls the traveling of the work vehicle via the first control system by using set information; a first communication line used for communication between the first control system and the second control system; and a second communication line that transmits information to the first control system from the second control system, wherein the second control system generates information for controlling an engine of the work vehicle and information for controlling a brake device of the work vehicle, and transmits the information for controlling the engine and the information for controlling the brake device to the first control system via the second communication line by an information transmission system different from an information transmission system by the first communication line.

Claims

1. A work vehicle comprising:

a first control system that controls a traveling of a work vehicle;

a second control system that controls the traveling of the work vehicle via the first control system by using set information;

a first communication line used for communication between the first control system and the second control system; and

a second communication line that transmits information to the first control system from the second control system, wherein

the second control system generates information for controlling an engine of the work vehicle and information for controlling a brake device of the work vehicle, and transmits the information for controlling the engine and the information for controlling the brake device to the first control system via the second communication line by an information transmission system different from an information transmission system of the communication by the first communication line.

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

a communication device provided to the work vehicle, the communication device making communication with an outside of the work vehicle, wherein

the set information is information acquired from the communication device.

3. The work vehicle according to claim 1, wherein

the first control system receives the information for controlling the engine and the information for controlling the brake device from the second control system via the second communication line, when a situation in which information is not transmitted from the second control system via the first communication line is continued.

4. The work vehicle according to claim 1, wherein

the second control system generates a control signal formed by converting the information for controlling the engine and the information for controlling the brake device into a pulse width, and outputs the generated control signal to the second communication line.

5. The work vehicle according to claim 4, wherein

the first control system brings the engine into an idling state to cause the brake device to generate maximum braking force, when a magnitude of the control signal is outside a normal range.

6. A work vehicle that can switch between a first driving mode for allowing the work vehicle to travel in a manned state and a second driving mode for allowing the work vehicle to travel in an unmanned state, the work vehicle comprising:

a communication device provided to the work vehicle, the communication device making communication with an outside of the work vehicle;

a first control system that controls a traveling of the work vehicle;

a second control system that controls the traveling of the work vehicle via the first control system by using information acquired from the communication device in the second driving mode;

a first communication line used for communication between the first control system and the second control system; and

a second communication line that transmits information to the first control system from the second control system, wherein

the second control system generates information for controlling an engine of the work vehicle and information for controlling a brake device of the work vehicle, and outputs the information for controlling the engine and the information for controlling the brake device to the first control system via the second communication line as a control signal formed by converting the generated information for controlling the engine and the information for controlling the brake device into a pulse width, when a situation in which information is not transmitted from the second control system via the first communication line is continued in the second driving mode.

7. A control method for a work vehicle that can switch between a first driving mode for allowing the work vehicle to travel in a manned state and a second driving mode for allowing the work vehicle to travel in an unmanned state, the work vehicle including

a first control system that controls a traveling of the work vehicle,

a second control system that controls the traveling of the work vehicle via the first control system by using set information in the second driving mode,

a first communication line used for communication between the first control system and the second control system, and

a second communication line that transmits information for controlling an accelerator of the work vehicle and information for controlling a brake device of the work vehicle to the first control system from the second control system with an information transmission system different from that of the first communication line, the method comprising:

generating the information for controlling the engine of the work vehicle and the information for controlling the brake device of the work vehicle, and transmitting the information for controlling the engine and the information for controlling the brake device to the first control system via the second communication line as a control signal formed by converting the information for controlling the engine and the information for controlling the brake device into a pulse width, when a situation in which information is not transmitted from the second control system via the first communication line in the second driving mode is continued.

8. The control method for a work vehicle according to claim 7, wherein

the work vehicle includes a communication device that makes communication with an outside of the work vehicle, and

the set information is information acquired from the communication device.