Display system for working machine and display method for working machine

Abstract

A display system for a work machine includes a display unit that displays a function regarding delayed stop control of the engine of the work machine, along with an image of the surroundings of the work machine.

Description

Technology Field

[0001] The present disclosure relates to a display system for a work machine and a display method for a work machine. The present application claims priority based on Japanese Patent Application No. 2021-161088 filed in Japan on September 30, 2021, and incorporates the contents thereof herein by reference. Background Technology

[0002] Patent Document 1 discloses a technique for delaying engine shutdown in response to an engine shutdown command by an operator when the exhaust system temperature exceeds a temperature threshold. Furthermore, in the technique described in Patent Document 1, the engine can be immediately shut down by the operator performing a predetermined operation while the engine shutdown is being delayed. Prior art literature

[0003] Specification of U.S. Patent Application Publication No. 2015 / 075490 The problem to be solved

[0004] However, the technology described in Patent Document 1 did not include a configuration for stopping the control of slowing down the engine to stop it while the engine is slowing down, and for returning to normal engine operation.

[0005] The present disclosure is made in consideration of the above circumstances and aims to provide a system for stopping the engine of a work machine and a method for stopping the engine of a work machine that can stop the control while delaying the engine's stopping. means of solving the problem

[0006] One aspect of the present disclosure is a display system for a work machine having a display unit that displays a function regarding delayed stop control of the engine of the work machine together with an image of the surroundings of the work machine. Effects of the invention

[0007] According to the display system for a work machine and the display method for a work machine of the present disclosure, the control can be stopped during the control that delays the stopping of the engine. Brief explanation of the drawing

[0008] [Fig. 1] This is a schematic diagram showing the configuration of a work machine related to an embodiment of the present disclosure. [Fig. 2] This is a drawing showing the internal configuration of a driver's cab related to an embodiment of the present disclosure. [Fig. 3] This is a drawing showing the configuration of a rotary switch related to an embodiment of the present disclosure. [Fig. 4] This is a drawing showing an example of the operation of a lock lever related to an embodiment of the present disclosure. [Fig. 5] This is a schematic block diagram showing the hardware configuration of a control system related to an embodiment of the present disclosure. [Fig. 6] This is a flowchart showing an example of the operation of a control system related to an embodiment of the present disclosure. [Fig. 7] This is a drawing showing an example of a representation related to an embodiment of the present disclosure. [Fig. 8] This is a drawing showing an example of a representation related to an embodiment of the present disclosure. [Fig. 9] This is a drawing showing an example of a representation related to an embodiment of the present disclosure. [Fig. 10] This is a drawing showing an example of a representation related to an embodiment of the present disclosure. [Fig. 11] This is a drawing showing an example of a representation related to an embodiment of the present disclosure. [Fig. 12] This is a functional block diagram related to an embodiment of the present disclosure. Specific details for implementing the invention

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, the same or corresponding components are denoted by the same reference numerals, and descriptions are appropriately omitted.

[0010] (Configuration of the work machine (100))

[0011] FIG. 1 is a schematic diagram showing the configuration of a work machine (100) related to an embodiment of the present disclosure. The work machine (100) operates at a construction site and constructs a construction target such as soil. The work machine (100) related to an embodiment of the present disclosure is, for example, a hydraulic shovel. However, the work machine of the present disclosure may be any other work machine such as a dump truck, a wheel loader, or a motor grader. The work machine (100) is equipped with a driving body (110), a rotating body (120), a working machine (130), and a driver's cab (140). The work machine (100) related to an embodiment of the present disclosure authenticates the operator by performing wireless communication using a short-range wireless communication method with an operator terminal (300), such as a smartphone, carried by the operator.

[0012] The driving body (110) supports the working machine (100) so that it can be driven. The driving body (110) is equipped with two track shoes (111) installed on the left and right sides, and two driving motors (112) for driving each track shoe (111). The turning body (120) is supported on the driving body (110) so that it can be turned around a turning center.

[0013] The work device (130) is driven by hydraulics. The work device (130) is supported so as to be driven in the up-and-down direction on the front of the slewing body (120). The driver's cabin (140) is a space for an operator to sit and operate the work machine (100). The driver's cabin (140) is installed on the front left side of the slewing body (120). In this embodiment, as shown in FIG. 1, the up-and-down, left-and-right, and front-and-back directions are determined based on the slewing body (120). Also, the part of the slewing body (120) where the work device (130) is mounted is called the front. Also, with respect to the front of the slewing body (120), the part on the opposite side is called the rear, the part on the left is called the left side, and the part on the right is called the right side.

[0014] (Composition of the rotating body (120))

[0015] The slewing body (120) is equipped with an engine (121), a hydraulic pump (122), a control valve (123), a slewing motor (124), and a fuel injection device (125). The engine (121) is a prime mover that drives the hydraulic pump (122). The engine (121) is an example of a power source. A starter motor (1211) is installed in the engine (121). The engine (121) is started by the rotation of the starter motor (1211).

[0016] The hydraulic pump (122) is a variable displacement pump driven by the engine (121). The hydraulic pump (122) supplies hydraulic fluid to each actuator through a control valve (123). Each actuator includes a boom cylinder (131C), an arm cylinder (132C), a bucket cylinder (133C), a travel motor (112), and a swing motor (124). The control valve (123) controls the flow rate of the hydraulic fluid supplied from the hydraulic pump (122).

[0017] The slewing motor (124) is driven by hydraulic fluid supplied from the hydraulic pump (122) through the control valve (123) and rotates the slewing body (120). The fuel injection device (125) injects fuel into the engine (121).

[0018] (Configuration of the working machine (130))

[0019] The working device (130) is equipped with a boom (131), an arm (132), a bucket (133), a boom cylinder (131C), an arm cylinder (132C), and a bucket cylinder (133C).

[0020] The base of the boom (131) is mounted to the slewing body (120) via a boom pin. The arm (132) connects the boom (131) and the bucket (133). The base of the arm (132) is mounted to the tip of the boom (131) via an arm pin. The bucket (133) is equipped with a blade for excavating soil, etc., and a receiving portion for receiving the excavated soil. The base of the bucket (133) is mounted to the tip of the arm (132) via a bucket pin.

[0021] The boom cylinder (131C) is a hydraulic cylinder for operating the boom (131). The base end of the boom cylinder (131C) is mounted on the slewing body (120). The front end of the boom cylinder (131C) is mounted on the boom (131). The arm cylinder (132C) is a hydraulic cylinder for driving the arm (132). The base end of the arm cylinder (132C) is mounted on the boom (131). The front end of the arm cylinder (132C) is mounted on the arm (132). The bucket cylinder (133C) is a hydraulic cylinder for driving the bucket (133). The base end of the bucket cylinder (133C) is mounted on the arm (132). The front end of the bucket cylinder (133C) is mounted on a link member connected to the bucket (133).

[0022] (Configuration of the driver's cabin (140))

[0023] A door (141) for an operator to board is installed on the seat of the driver's cabin (140). The door (141) is equipped with a lock actuator (1411) for locking the door (141) and a door switch (1412) for unlocking it.

[0024] FIG. 2 is a drawing showing the internal configuration of a driver's cab (140) related to an embodiment of the present disclosure. FIG. 3 is a drawing showing the configuration of a rotary switch (144) related to an embodiment of the present disclosure. FIG. 4 is a drawing showing an example of operation of a lock lever (143LL) related to an embodiment of the present disclosure. Inside the driver's cab (140), a driver's seat (142), an operating device (143), a rotary switch (144), and a touch panel (145D) are installed. As shown in FIG. 3, the rotary switch (144) is a switch that takes four positions, OFF position (1442), ACC (accessory) position (1443), IG (ignition) position (1444), and ST (start) position (1445), by rotating a rotating part (1441) as indicated by a dashed arrow. Then, when the finger is removed from the rotary switch (144) in the ST position (1445), it automatically returns to the IG position (1444) by means of a spring mechanism not shown. In the OFF position (1442), a command to stop the engine (121) is given. In the ACC position (1443), a command to stop the engine (121) is given, and a command to put a predetermined device into an operating state is given. In the IG position (1444), a command to put the engine (121) into an operating state is given. In the ST position (1445), a command to start the engine (121) is given.

[0025] In the present disclosure, the rotary switch (144) is an example of an ignition switch of an engine. The ignition switch may be configured as a key switch or a push switch, for example, instead of a rotary switch. The rotary switch (144) outputs an electrical signal corresponding to an OFF position (1442), an ACC position (1443), an IG position (1444), or an ST position (1445).

[0026] The operating device (143) is a device for driving the vehicle body (110), the slewing body (120), and the work machine (130) by manual operation by an operator. The operating device (143) is equipped with a left operating lever (143LO), a right operating lever (143RO), a left foot pedal (143LF), a right foot pedal (143RF), a left driving lever (143LT), a right driving lever (143RT), and a lock lever (143LL).

[0027] The left operating lever (143LO) is installed on the left side of the driver's seat (142). The right operating lever (143RO) is installed on the right side of the driver's seat (142).

[0028] The left operating lever (143LO) is an operating mechanism for performing the pivoting operation of the pivoting body (120) and the excavation / dumping operation of the arm (132). Specifically, when the operator of the work machine (100) pushes the left operating lever (143LO) forward, the arm (132) performs a dumping operation. Also, when the operator of the work machine (100) pushes the left operating lever (143LO) backward, the arm (132) performs an excavation operation. Additionally, when the operator of the work machine (100) pushes the left operating lever (143LO) to the right, the pivoting body (120) pivots to the right. Also, when the operator of the work machine (100) pushes the left operating lever (143LO) to the left, the pivoting body (120) pivots to the left. In addition, in another embodiment, when the left operating lever (143LO) is pushed in the forward and backward directions, the pivot body (120) may rotate to the right or to the left, and when the left operating lever (143LO) is pushed in the left and right directions, the arm (132) may perform an excavation operation or a dump operation.

[0029] The right operating lever (143RO) is an operating mechanism for performing the excavation / dumping operation of the bucket (133) and the lifting / lowering operation of the boom (131). Specifically, when the operator of the work machine (100) pushes the right operating lever (143RO) forward, the lowering operation of the boom (131) is executed. Also, when the operator of the work machine (100) pushes the right operating lever (143RO) backward, the lifting operation of the boom (131) is executed. Also, when the operator of the work machine (100) pushes the right operating lever (143RO) to the right, the dumping operation of the bucket (133) is performed. Also, when the operator of the work machine (100) pushes the right operating lever (143RO) to the left, the excavation operation of the bucket (133) is performed. In addition, in another embodiment, when the right operating lever (143RO) is pushed in the forward and backward directions, the bucket (133) may perform a dump operation or an excavation operation, and when the right operating lever (143RO) is pushed in the left and right directions, the boom (131) may perform a lifting operation or a lowering operation.

[0030] The left foot pedal (143LF) is positioned on the left side of the floor surface in front of the driver's seat (142). The right foot pedal (143RF) is positioned on the right side of the floor surface in front of the driver's seat (142). The left driving lever (143LT) is pivotally supported by the left foot pedal (143LF) and is configured so that the tilt of the left driving lever (143LT) and the downward movement of the left foot pedal (143LF) are linked. The right driving lever (143RT) is pivotally supported by the right foot pedal (143RF) and is configured so that the tilt of the right driving lever (143RT) and the downward movement of the right foot pedal (143RF) are linked.

[0031] The left foot pedal (143LF) and the left driving lever (143LT) correspond to the rotational drive of the left track shoe of the driving body (110). Specifically, when the operator of the working machine (100) pushes the left foot pedal (143LF) or the left driving lever (143LT) forward, the left track shoe rotates in the forward direction. Additionally, when the operator of the working machine (100) pushes the left foot pedal (143LF) or the left driving lever (143LT) backward, the left track shoe rotates in the backward direction.

[0032] The right foot pedal (143RF) and the right driving lever (143RT) correspond to the rotational drive of the right track shoe of the driving body (110). Specifically, when the operator of the working machine (100) pushes the right foot pedal (143RF) or the right driving lever (143RT) forward, the right track shoe rotates in the forward direction. Additionally, when the operator of the working machine (100) pushes the right foot pedal (143RF) or the right driving lever (143RT) backward, the right track shoe rotates in the backward direction.

[0033] The lock lever (143LL) is a safety mechanism installed to prevent the operator from unintentionally operating an actuator, such as a work device (130), while the device is not in operation. The lock lever (143LL) is positioned along the side of a left console box (142LC) installed on the left side of the driver's seat (142), so as to be rotatable between a locked position and an unlocked position. In FIG. 4, the lock lever (143LL) indicated by a solid line is in the locked position, and the lock lever (143LL) indicated by a dashed line is in the unlocked position. By setting the lock lever (143LL) to the locked position, the control of the hydraulic fluid by the control valve (123) is stopped. Additionally, by setting the lock lever (143LL) to the locked position, a switch that operates in conjunction with the lock lever (143LL) is turned on. The state in which the lock lever (143LL) is in the locked position is an example of the work device (130) being in a locked state. Additionally, the state in which the lock lever (143LL) is in the unlocked position is an example of the working device (130) being in the unlocked state.

[0034] When the lock lever (143LL) is in the locked position, the lock lever (143LL) rotates and locks to a position that is covered by the side of the left console box of the driver's seat (142), that is, a position that is removed from the passage between the door (141) and the driver's seat (142). This allows the operator to move between the door (141) and the driver's seat (142). Meanwhile, when the lock lever (143LL) is in the unlocked position, the lock lever (143LL) rotates and locks to a position that is tilted forward to block the passage between the driver's seat (142) and the door (141). Thus, when the lock lever (143LL) is in the unlocked position, if the operator attempts to move away from the driver's seat (142), the lock lever (143LL) acts as an obstruction, preventing the operator from moving away from the driver's cabin (140) while the actuator, such as the work device (130), is operational. Additionally, the on / off state of the switch operating in conjunction with the lock lever (143LL) is monitored, for example, by a control controller (205) described later.

[0035] (Example of camera configuration)

[0036] A plurality of cameras (126) are installed on the rotating body (120) to capture images of the surroundings of the working machine (100). In the example shown in FIG. 1, four cameras (126) are installed on the rotating body (120), including a camera that captures the front area around the rotating body (120), a camera that captures the left area, a camera that captures the rear area, and a camera that captures the right area.

[0037] (Configuration of the control system (145))

[0038] FIG. 5 is a schematic block diagram showing the hardware configuration of a control system (145) related to an embodiment of the present disclosure. In FIG. 5, solid lines indicate power lines and dashed lines indicate signal lines. Also, in FIG. 5, a dotted line indicates wireless communication.

[0039] The control system (145) is equipped with a power supply unit (201), a starter signal unit (202), a gateway function controller (203), a monitor controller (204), a control controller (205), and an engine controller (206). The starter signal unit (202), the gateway function controller (203), the monitor controller (204), the control controller (205), and the engine controller (206) are connected to each other via an in-vehicle network such as a CAN (Controller Area Network) or Ethernet (registered trademark). The power supply unit (201) supplies electrical energy to each device constituting the control system (145).

[0040] The starter signal unit (202) receives signal input from the door switch (1412), rotary switch (144), operator terminal (300), and monitor controller (204). Based on the input signal, the starter signal unit (202) outputs control signals, such as a start signal, to the gateway function controller (203), monitor controller (204), control controller (205), engine controller (206), lock actuator (1411), or cell motor (1211). The controller to which the start signal is input starts and operates by the electrical energy supplied by the power supply unit (201). The starter signal unit (202) is an example of a start unit that starts the control controller (205). Furthermore, the starter signal unit (202) always operates by receiving electrical energy from the power supply unit (201) even when other controllers are in a stopped state. Meanwhile, when the work machine (100) is not running, the starter signal unit (202) may be configured so that only the communication part with the operator terminal (300) is in a running state and other components are in a idle state, or it may be configured to run intermittently.

[0041] Additionally, the starter signal unit (202) outputs control signals, such as an EDS signal, an ACCON signal, and an IGON signal, to the monitor controller (204), the control controller (205), and the engine controller (206) through the gateway function controller (203). The EDS (engine delayed shutdown) signal is a signal indicating the execution status of the delayed shutdown control. In this embodiment, the delayed shutdown control is a control that, when there is a shutdown instruction indicating the shutdown of the engine (121) of the work machine (100), delays the shutdown of the engine (121) until a predetermined condition is met, and then stops the engine (121). Additionally, the starter signal unit (202) performs, for example, a determination of whether to start the delayed shutdown control, a determination of whether to stop the delayed shutdown control, and a determination of whether to terminate the delayed shutdown control. When the EDS signal is ON, it indicates that the delayed shutdown control is being executed, and when it is OFF, it indicates that the delayed shutdown control is not being executed. Here, the predetermined condition is a condition for determining whether to stop the engine (121). If the predetermined condition is met, the engine (121) is stopped, and if the predetermined condition is not met, the engine (121) continues to operate under delayed stop control. The predetermined condition is, for example, that the temperature of the exhaust system, such as the temperature of the urea injector in the urea SCR (Selective Catalytic Reduction) system, or the temperature related to the engine is below a predetermined temperature threshold, or that the duration of operation of the engine (121), for example, in a low-speed idling state, is above a predetermined time threshold. The ACCON (accessory on) signal is turned on when the rotary switch (144) is in a position other than the OFF position (1442), and is turned off when it is in the OFF position (1442).The IGON (ignition on) signal is turned on in the IG position (1444) or ST position (1445), and turned off in, for example, the OFF position (1442) or ACC position (1443).

[0042] Additionally, the starter signal unit (202) inputs, through the gateway function controller (203), a signal indicating whether the lock lever (143LL) is in a locked or unlocked position, a signal indicating the temperature used when determining a predetermined condition in delay stop control, or a signal indicating the result of such determination from the monitor controller (204), control controller (205), engine controller (206), etc.

[0043] The gateway function controller (203) relays communication between controllers such as the starter signal unit (202), monitor controller (204), control controller (205), and engine controller (206).

[0044] The monitor controller (204) controls the display by the touch panel (145D) provided by the control system (145) and notifies the occurrence of a touch operation of the touch panel (145D). In addition, the control system (145) related to another embodiment may be equipped with a monitor that does not have a touch input function, such as an LCD (Liquid Crystal Display), and a physical button, instead of a touch panel (145D). In this case, the monitor controller (204) controls the display by the monitor and notifies the pressing of the physical button.

[0045] The control controller (205) acquires various data related to a hydraulic device that controls the operation of the work machine (130) by means of a sensor not shown, and outputs a control signal to control the hydraulic device according to the operation of the operating device (143). That is, the control controller (205) controls the operation of the boom cylinder (131C), arm cylinder (132C), bucket cylinder (133C), driving motor (112), slewing motor (124), etc. The control controller (205) is an example of a vehicle body control unit that outputs a control signal to drive the vehicle body of the work machine (100) by power supplied by a power source.

[0046] The engine controller (206) controls the engine (121) by acquiring various data related to the engine (121) through a sensor not shown and instructing the fuel injection device (125) to inject a fuel amount.

[0047] And, the monitor controller (204), control controller (205), and engine controller (206), etc., receive control signals such as an EDS signal, an ACCON signal, and an IGON signal from the starter signal unit (202), and perform a preset process based on the control signals such as the EDS signal, the ACCON signal, and the IGON signal. The monitor controller (204) displays the screen of the touch panel (145D), for example, when the IGON signal is ON or the ACCON signal is ON. The monitor controller (204) turns off the screen display of the touch panel (145D), for example, when the IGON signal is OFF and the ACCON signal is OFF. The control controller (205) stops the operation of the work machine (130), for example, when the EDS signal is ON. The engine controller (206) operates the engine (121) in a low-speed idling state, for example, when the EDS signal is ON. Additionally, the engine controller (206) stops the engine (121) when the IGON signal is off.

[0048] The control system (145) has the function of performing login processing for an operator on board the driver's cabin (140) by operating the touch panel (145D). For example, the control system (145) may be equipped with a controller that performs login processing, or the starter signal unit (202), gateway function controller (203), and monitor controller (204) may have the function of performing login processing. Specifically, the control system (145) displays an operator ID selection screen on the touch panel (145D) through the monitor controller (204) and receives the selection of an operator ID. When the selected operator ID indicates an operator with operating authority who is close to the work machine (100), the control system (145) authenticates that the operator on board the driver's cabin (140) is an operator with operating authority. The monitor controller (204) is an example of an authentication unit that authenticates the operator of the work machine (100).

[0049] (Operator terminal (300))

[0050] The operator terminal (300) functions as a peripheral of a short-range wireless communication method by executing a startup program for a pre-installed work machine (100). When the operator terminal (300) executes the startup program, it displays a list of work machines (100) and receives a selection of a work machine (100) to be started from the operator. When the operator terminal (300) receives a selection of a work machine (100), it begins transmitting an advertisement packet including, for example, an operator ID and the machine ID of the selected work machine (100).

[0051] (Operation of the control system (145))

[0052] Next, with reference to FIGS. 6 to 11, an example of the operation of delay stop control performed by the control system (145) will be described. FIG. 6 is a flowchart showing an example of the operation of the control system (145) related to an embodiment of the present disclosure. FIGS. 7 to 11 are drawings showing an example of the display of a touch panel (145D) related to an embodiment of the present disclosure.

[0053] The processing shown in FIG. 6 is initiated after the engine (121) is started. At the start of the processing shown in FIG. 6, the IGON signal is ON, and the rotary switch (144) is operated to the IG position (1444). Additionally, the touch panel (145D) displays a normal display screen (145D1) which is a display of the case where the delay stop control shown in FIG. 7 is not being executed, for example. The normal display screen (145D1) includes an overhead view image (145DA11) based on images captured by four cameras (126) and computer graphics images of the work machine (100), an image captured by one of the four cameras (126) (145DA12), predetermined sensor information from the work machine (100), and icons displaying operation buttons.

[0054] In addition, in the following description, as an example, the starter signal unit (202) of the control system (145) is assumed to primarily perform the processing of each step. However, some or all of the processing of each step may be performed primarily by the monitor controller (204), control controller (205), and engine controller (206), etc., instead of the starter signal unit (202). Also, in FIG. 6, the rotary switch (144) is abbreviated as "R-SW". Also, the delayed stop control is abbreviated as "EDS".

[0055] When the processing shown in FIG. 6 is initiated, the starter signal unit (202) first determines whether the rotary switch (144) is in the ACC position (1443) or the OFF position (1442) (step S11). If it is not in the ACC position (1443) and is not in the OFF position (1442) (step S11: NO), the starter signal unit (202) repeats the determination of step S11 at a predetermined period.

[0056] When the rotary switch (144) is in the ACC position (1443) or the OFF position (1442) (Step S11: YES), the starter signal unit (202) determines whether the operating condition for delayed stop control (EDS operating condition) is established (Step S12). The operating condition for delayed stop control is a condition for determining whether to start delayed stop control. If the operating condition for delayed stop control is established, the starter signal unit (202) starts delayed stop control and stops the engine (121) under delayed stop control. If the operating condition for delayed stop control is not established, the starter signal unit (202) does not perform delayed stop control and stops the engine (121). The operating condition for delayed stop control is, for example, that the temperature of one or more predetermined locations in the exhaust system is above a predetermined temperature threshold. The predetermined temperature threshold is, for example, a temperature value at which it is not desirable to stop the engine (121) in a state above that temperature threshold.

[0057] When the operating condition for delay stop control is established (Step S12: YES), the starter signal unit (202) sets the EDS signal to ON (Step S13), and displays a delay stop control operation indicator, which is an indication that delay stop control is in operation, on the touch panel (145D) (Step S14). FIG. 8 shows an example of a display screen (145D2) in the delay stop control operation indicator. The display screen (145D2) includes an overhead image (145DA11) and a display area (145DA2) indicating that delay stop control is in operation. In this case, the display area (145DA2) indicates that delay stop control is in operation by the string "Engine delay shutdown in operation".

[0058] Next, the starter signal unit (202) determines whether the termination condition for the delayed stop control (EDS termination condition) is established (step S15). The termination condition for the delayed stop control is a condition for determining whether to stop the engine (121) and terminate the delayed stop control. When the termination condition for the delayed stop control is established, the starter signal unit (202) stops the engine (121) and terminates the delayed stop control. The termination condition for the delayed stop control is, for example, that the temperature of one or more predetermined locations in the exhaust system is below a predetermined temperature threshold. The predetermined temperature threshold is, for example, a temperature value at which the engine (121) can be properly stopped when the temperature is below that temperature threshold. Alternatively, the termination condition for the delayed stop control is, for example, that a predetermined time has elapsed since the start of the delayed stop control. The predetermined time is, for example, a sufficient time for the temperature to decrease.

[0059] When the condition for terminating the delayed stop control is met (Step S15: YES), the starter signal unit (202) sets the EDS signal to off (Step S16), and displays a delay stop control termination notice on the touch panel (145D), which indicates that the delay stop control has ended (Step S17). FIG. 9 shows an example of a display screen (145D3) in the delay stop control termination notice display. The display screen (145D3) includes an overhead image (145DA11) and a display area (145DA3) indicating that the delay stop control has ended. In this case, the display area (145DA3) indicates that the delay stop control has ended by the string "Engine delay shutdown has ended."

[0060] The starter signal unit (202) sets the IGON signal to off (step S18) when the delay stop control termination notification is displayed on the touch panel (145D) (step S17), or when the operating condition for the delay stop control is not established (step S12: NO). When the IGON signal is turned off, the engine controller (206) stops the engine (121).

[0061] Next, the starter signal unit (202) determines whether the rotary switch (144) is in the ACC position (1443) (step S19). If the rotary switch (144) is in the ACC position (1443) (step S19: YES), the starter signal unit (202) displays a normal display screen (145D1) on the touch panel (145D) after a predetermined time has elapsed since the delay stop control termination notification was displayed in step S17 (step S20). If the rotary switch (144) is in the ACC position (1443) (step S19: YES), the starter signal unit (202) continues to display a normal display screen (145D1) on the touch panel (145D) (step S20).

[0062] Meanwhile, if the rotary switch (144) is not in the ACC position (1443) (Step S19: NO), the starter signal unit (202) determines whether the rotary switch (144) is in the OFF position (1442) (Step S21). If the rotary switch (144) is in the OFF position (1442) (Step S21: YES), the starter signal unit (202), if it displays a delay stop control termination notice in Step S17), turns off the display on the touch panel (145D) after a predetermined time has elapsed since displaying the delay stop control termination notice (Step S22), and terminates the processing shown in FIG. 6. If the operation condition for delay stop control is not established in Step S12, the display on the touch panel (145D) turns off after a predetermined time has elapsed (Step S22), and terminates the processing shown in FIG. 6.

[0063] Additionally, when the rotary switch (144) is not in the OFF position (1442) (Step S21: NO), the starter signal unit (202) outputs a signal according to the position of the rotary switch (144), and the control system (145) performs processing according to the position of the rotary switch (144).

[0064] Meanwhile, in step S15, if the termination condition for the delayed stop control is not established (step S15: NO), the starter signal unit (202) determines whether the rotary switch (144) is in the IG position (1444) (step S23). If the rotary switch (144) is not in the IG position (1444) (step S23: NO), the starter signal unit (202) determines whether the termination condition for the delayed stop control (EDS termination condition) is established again after a predetermined time (step S15).

[0065] When the rotary switch (144) is in the IG position (1444) (Step S23: YES), the starter signal unit (202) determines whether the lock lever (143LL) is in the locked position (Step S24). When the lock lever (143LL) is in the locked position (Step S24: YES), the starter signal unit (202) sets the EDS signal to off (Step S25) and performs a cancellation reception display on the touch panel (145D), which is an indication that the cancellation of the delay stop control has been received (Step S26). FIG. 10 shows an example of a display screen (145D4) in the cancellation reception display. The display screen (145D4) includes an overhead view image (145DA11) and a display area (145DA4) indicating that the delay stop control has been canceled. In this case, the display area (145DA4) indicates that the delay stop control has been canceled by the string "Engine delay shutdown has been canceled."

[0066] Next, the starter signal unit (202) displays a normal display screen (145D1) on the touch panel (145D) after a predetermined time has elapsed following the cancellation reception indication in step S26 (step S27). Next, the starter signal unit (202) performs the processing of step S11 again.

[0067] Meanwhile, if the lock lever (143LL) is not in the locked position (Step S24: NO), the starter signal unit (202) performs a cancellation refusal display on the touch panel (145D), which is an indication that the cancellation of the delay stop control is refused (Step S28). FIG. 11 shows an example of a display screen (145D5) in the cancellation acceptance display. The display screen (145D5) includes an overhead image (145DA11) and a display area (145DA5) of an indication that the cancellation of the delay stop control is refused. In this case, the display area (145DA5) includes an image indicating that the cancellation of the delay stop control is refused by the string "If you want to cancel the engine delay shutdown, please put the lock lever in the locked position and then set the key position to IG-ON." and that the lock lever (143LL) should be put in the locked position, and also includes an image showing the operation method of the rotary switch (144).

[0068] After the cancellation refusal indication is made on the touch panel (145D) (step S28), the starter signal unit (202) determines whether the termination condition of the delay stop control (EDS termination condition) is established again after a predetermined time (step S15).

[0069] By the above processing, for example, when the engine (121) is running and the operator operates the rotary switch (144) to the OFF position (1442), the control system (145) stops the engine (121) (step S18) and turns off the touch panel (145D) when the operating condition for delayed stop control is not established (step S12: NO).

[0070] Additionally, for example, when the engine (121) is running and the operator moves the rotary switch (144) to the OFF position (1442), the control system (145) displays a delay stop control operation indicator (Fig. 8) on the touch panel (145D) when the delay stop control operation condition is established (Step S12: YES), displays a delay stop control termination notice indicator (Fig. 9) on the touch panel (145D) when the delay stop control termination condition is established (Step S15: YES), stops the engine (121) (Step S18), and turns off the touch panel (145D) (Step S22).

[0071] And, before the termination condition of the delayed stop control is established (step S15: NO), if the operator operates the rotary switch (144) to the IG position (1444) (step S23: YES), the control system (145) stops the delayed stop control when the lock lever (143LL) is in the locked position (step S24: YES), performs a cancellation acceptance display (Fig. 10) on the touch panel (145D) (step S26), and also performs a normal display (Fig. 7) (step S27).

[0072] Meanwhile, before the termination condition for the delayed stop control is established (Step S15: NO), if the operator operates the rotary switch (144) to the IG position (1444) (Step S23: YES), the control system (145) performs a cancellation refusal indication (Fig. 11) when the lock lever (143LL) is not in the locked position (Step S24: NO) (Step S28) and continues the delayed stop control (after Step S15).

[0073] (Actions / Effects)

[0074] As described above, according to the present embodiment, the delay stop control can be stopped by operating the rotary switch (144) to the IG position (1444) during the delay stop control that delays the stopping of the engine (121). In addition, in the present embodiment, when operated to the IG position (1444), the lock lever (143LL) is in the locked position as an additional condition for stopping the delay stop control. According to this, when the delay stop control is stopped, the lock lever (143LL) is in the locked position, so it is possible to prevent the working machine (100) from operating due to unintended operation of the operating device (143) when the delay stop control is stopped.

[0075] (Other embodiments)

[0076] Although an embodiment has been described in detail above with reference to the drawings, the specific configuration is not limited to what has been described above, and various design changes are possible. That is, in other embodiments, the order of the processing described above may be appropriately changed. Also, some processing may be executed in parallel. In addition, information may be output by voice or notification signals instead of or together with the display of information by the touch panel (145D). In addition, in the above embodiment, the instruction to stop delay stop control is performed by operating the rotary switch (144) to the IG position (1444), but it is not limited to this. For example, in addition to operating the rotary switch (144) to the IG position (1444), it may be performed by a predetermined input operation, such as touching a predetermined button on the touch panel (145D) or pressing a predetermined switch, on a predetermined input device such as the touch panel (145D) or a predetermined switch.

[0077] In the control system (145) related to the above-described embodiment, some components constituting the control system (145) may be mounted inside the work machine (100), and other components may be installed outside the work machine (100).

[0078] (Computer Configuration)

[0079] Each device provided by the aforementioned control system (145), such as the starter signal unit (202), gateway function controller (203), monitor controller (204), control controller (205), engine controller (206), etc., can be configured using a computer such as a microcomputer or CPU (Central Processing Unit), and hardware such as peripheral circuits or peripheral devices of the computer. Additionally, the computer may be configured using a custom LSI (Large Scale Integrated Circuit) such as a PLD (Programmable Logic Device). Examples of PLDs include PAL (Programmable Array Logic), GAL (Generic Array Logic), CPLD (Complex Programmable Logic Device), and FPGA (Field Programmable Gate Array). In this case, some or all of the functions realized by the processor may be realized by the corresponding integrated circuit.

[0080] (Basic configuration example)

[0081] Next, with reference to FIG. 12, a basic configuration example related to an embodiment of the present disclosure corresponding to the above embodiment will be described. FIG. 12 is a functional block diagram related to an embodiment of the present disclosure. The stop system (400) shown in FIG. 12 is a configuration corresponding to the control system (145) shown in FIG. 5 and comprises an engine stop control unit (401), an engine stop control stop unit (402), and a display unit (403). However, the display unit (403) may be omitted.

[0082] The engine stop control unit (401) executes delayed stop control by delaying the stopping of the engine (121) until a predetermined condition is met, when there is a stop instruction instructing the engine (121) of the work machine (100) to stop. Here, the stop instruction corresponds to an input operation, for example, setting the rotary switch (144) to the OFF position (1442) or the ACC position (1443). The predetermined condition corresponds to the delayed stop control termination condition determined in step S15. The engine stop control unit (401) corresponds to a starter signal unit (202) that performs the judgment processing of step S11, the judgment processing of step S15, the processing of step S18, etc.

[0083] The engine stop control stop unit (402) stops the delayed stop control when there is a cancellation instruction to cancel the stop instruction (Step S23: YES) and when the lock lever (143LL) of the work machine (100) is in the locked position (Step S24: YES), and continues the delayed stop control when the lock lever (143LL) is in the unlocked position (Step S24: NO). Here, the cancellation instruction corresponds to an input operation, for example, switching the rotary switch (144) from the OFF position (1442) or ACC position (1443) to the IG position (1444). The engine stop control stop unit (402) corresponds to a starter signal unit (202) that performs the judgment processing of Step S23, the judgment processing of Step S24, the processing of Step S25, etc.

[0084] And, the engine stop control stop unit (402) may stop the delayed stop control when there is a cancellation instruction (step S23: YES), when the lock lever (143LL) is in the unlocked position (step S24: NO), and then when there is a cancellation instruction again (step S23: YES), when the lock lever (143LL) is in the locked position (step S24: YES).

[0085] Additionally, the display unit (403) may change the display content to a cancellation acceptance display (step S26) or a cancellation rejection display (step S28) when there is a cancellation instruction (step S23: YES), when the lock lever (143LL) is in the locked position (step S24: YES), and when it is in the unlocked position (step S24: NO).

[0086] Additionally, the display unit (403) may perform an indication (Step S28) that encourages moving the lock lever (143LL) to the locked position (Fig. 11) when there is a cancellation instruction (Step S23: YES) or when the lock lever (143LL) is in the unlocked position (Step S24: NO).

[0087] Additionally, the display unit (403) may be configured to display an indication to stop delay stop control (Fig. 10) when there is a cancellation instruction (Step S23: YES) or when the lock lever (143LL) is in the locked position (Step S24: YES) (Step S26).

[0088] And, the cancellation instruction is performed, for example, by turning on the ignition switch of the engine (121). In the above embodiment, the operation of turning on the ignition switch corresponds to the operation of setting the rotary switch (144) to the IG position (1444).

[0089] Alternatively, the cancellation instruction is also performed by a specific input operation on a specific input device, such as turning on the ignition switch of the engine (121). Here, the specific input operation on the specific input device corresponds to a specific input operation, such as touching a specific button on the touch panel (145D) or pressing a specific switch, on a specific input device such as a touch panel (145D) or a specific switch, as shown as a variation of the above embodiment.

[0090] According to the engine stop system (400) of the work machine shown in FIG. 12, the control can be stopped during the control that delays the engine stop.

[0091] In addition, the stop system (400) related to this embodiment also functions as a “display system” for the work machine (100).

[0092] That is, the display system for the work machine (100) is provided with a display unit (403) that displays a function regarding the delayed stop control of the engine of the work machine (100) along with an image of the surroundings of the work machine (100), as shown in FIGS. 8 to 11. Here, the image of the surroundings of the work machine (100) is, for example, an overhead view image (145DA11) of the surroundings of the work machine (100) as shown in FIGS. 8 to 11. However, in other embodiments, it is not limited to this, and the image of the surroundings of the work machine (100) may be of any type as long as the operator can perceive the situation, such as workers or obstacles existing around the work machine (100).

[0093] In addition, the display area for the function of delay stop control of the engine of the work machine (100) is, for example, the display area (145DA2 to 145DA5) shown in each of FIGS. 8 to 11.

[0094] By doing this, the operator can check the safety conditions around the work machine (100) and determine the status of the delay stop control function.

[0095] Additionally, the display unit (403) displays an indication that the engine delay stop control of the work machine (100) is in operation, as shown in the display area (145DA2) of FIG. 8, as an example of an indication of a function regarding the delay stop control of the engine of the work machine (100).

[0096] By doing this, the operator can determine that the delay stop control is in operation, along with the surrounding conditions of the work machine (100).

[0097] Additionally, the display system further comprises an engine stop control stop unit (402) that cancels the engine's delay stop control based on the receipt of the engine's delay stop control stop (the aforementioned cancellation instruction) of the working machine (100).

[0098] And, the display unit (403) performs a display for receiving the delay stop control of the engine of the work machine (100), as an example of a display of a function regarding the delay stop control of the engine of the work machine (100), such as shown in the display area (145DA5) of FIG. 11.

[0099] By doing this, the operator can determine the operation required to cancel the engine's delayed stop control, along with the surrounding conditions of the work machine (100).

[0100] Additionally, the display unit (403) displays an indication that the delay stop control of the engine of the work machine (100) has been canceled, as shown in the display area (145DA4) of FIG. 10, as an example of an indication of a function regarding the delay stop control of the engine of the work machine (100).

[0101] By doing this, the operator can determine that the engine's delayed stop control has been canceled, along with the surrounding conditions of the work machine (100).

[0102] In addition, in this embodiment, the acceptance of the delay stop control of the engine of the work machine (100) is described as setting the lock lever to the locked position and then putting the key position into IG-ON, but other embodiments are not limited to this aspect.

[0103] For example, the reception of the suspension of the delay stop control of the engine of the work machine (100) may be based on operation of the monitor (touch panel (145D)) by the operator. Specifically, the suspension of the delay stop control may be received by the operator touching a dedicated button displayed on the monitor.

[0104] By doing this, the operator can perform the operation to stop the delay stop control while checking the surrounding image of the work machine (100) displayed on the monitor. That is, since the operator does not have to take their eyes off the surrounding image until the operation to stop the delay stop control is performed, safety can be further enhanced.

[0105] Additionally, the engine stop control stop unit (402) of the stop system (400) related to the present embodiment is described as stopping the delayed stop control when the lock lever (143LL) of the work machine (100) is in the locked position and continuing the delayed stop control when the lock lever (143LL) is in the unlocked position when there is a cancellation instruction to cancel the engine stop instruction. However, other embodiments are not limited to this aspect.

[0106] That is, the stop system (400) related to another embodiment may always stop the delayed stop control regardless of the position of the lock lever (143LL) when a cancellation instruction is given. According to the aforementioned stop system (400) (display system), as described above, the status of the function regarding the delayed stop control can be determined while checking the safety conditions around the work machine (100) from an image.

[0107] In addition, the display system for additional variations may be equipped with the following functions. That is, the display system may detect the presence of obstacles, etc., from image analysis of the surroundings of the working machine (100), and if obstacles, etc. are present, it may not receive the suspension of the engine delay stop control. Furthermore, for the aforementioned image analysis, for example, a known learned model using neural network technology may be applied.

[0108] According to each aspect of the present invention, the control can be stopped during the control that delays the stopping of the engine. Explanation of the symbols

[0109] 100: Working machine, 110: Traveling body, 120: Slewing body, 130: Working implement, 140: Cab, 141: Door, 1411: Lock actuator, 1412: Door switch, 144: Rotary switch, 145: Control system, 145D: Touch panel, 201: Power supply unit, 202: Starter signal unit, 203: Gateway function controller, 204: Monitor controller, 205: Control controller, 206: Engine controller, 300: Operator terminal, 143LL: Lock lever, 400: Stop system, 401: Engine stop control unit, 402: Engine stop control stop unit, 403: Display unit

Claims

Claim 1 A display system for a work machine, comprising a display unit that displays a function regarding delay stop control of the engine of the work machine along with an image of the surroundings of the work machine, and an engine stop control stop unit that cancels the delay stop control of the engine of the work machine based on the receipt of the suspension of the delay stop control of the engine of the work machine, wherein the display unit displays a display for the receipt of the suspension of the delay stop control of the engine of the work machine along with an image of the surroundings of the work machine on the same screen, and the receipt of the suspension of the delay stop control of the engine of the work machine is based on operation of an ignition switch or a monitor. Claim 2 A display system for a work machine according to claim 1, wherein the display unit displays an indication that the engine delay stop control of the work machine is in operation, together with an image of the surroundings of the work machine. Claim 3 A display system for a work machine according to claim 1 or 2, wherein the display unit displays an indication that the delay stop control of the engine of the work machine has been canceled, together with an image of the surroundings of the work machine. Claim 4 A display system for a work machine according to claim 1 or 2, wherein the image of the surroundings of the work machine is an overhead view image of the surroundings of the work machine seen from above. Claim 5 A method for displaying a work machine, comprising the steps of: displaying a function regarding delay stop control of the engine of the work machine together with an image of the surroundings of the work machine; and canceling the delay stop control of the engine of the work machine based on the receipt of the suspension of the delay stop control of the engine of the work machine, wherein the step of displaying the function comprises displaying the receipt of the suspension of the delay stop control of the engine of the work machine together with an image of the surroundings of the work machine on the same screen, and the receipt of the suspension of the delay stop control of the engine of the work machine is based on operation of an ignition switch or a monitor. Claim 6 A method for displaying a work machine according to claim 5, wherein in the step of performing the above display, a display indicating that the engine delay stop control of the work machine is in operation is performed together with an image of the surroundings of the work machine. Claim 7 A method for displaying a work machine according to claim 5 or 6, wherein in the step of performing the above display, a display indicating that the delay stop control of the engine of the work machine has been canceled is performed together with an image of the surroundings of the work machine. Claim 8 A method for displaying a work machine according to claim 5 or 6, wherein the image of the surroundings of the work machine is a bird's-eye view image of the surroundings of the work machine seen from above. Claim 9 delete Claim 10 delete Claim 11 delete Claim 12 delete Claim 13 delete Claim 14 delete

Images