Display system for a work machine and display method for a work machine

Abstract

To provide an engine stop system for a work machine, etc., capable of stopping the control of delaying the stop of the engine during its execution.SOLUTION: A display system for a work machine includes a display unit for displaying an image of surroundings of the work machine as well as functions related to delayed stop control of an engine of the work machine.SELECTED DRAWING: Figure 12

Description

[Technical Field]

[0001] TECHNICAL FIELD The present disclosure relates to a display system for a work machine and a display method for a work machine. [Background technology]

[0002] Patent Document 1 discloses a technology that delays engine shutdown when the exhaust system temperature exceeds a temperature threshold in response to an engine shutdown command from an operator. Furthermore, the technology described in Patent Document 1 allows the operator to immediately stop the engine by performing a predetermined operation while the engine shutdown is being delayed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent Application Publication No. 2015 / 075490 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the technology described in Patent Document 1 did not include a configuration for canceling the control to delay and stop the engine while the engine stop is being delayed, and returning the engine to normal operation.

[0005] The present disclosure has been made in consideration of the above circumstances, and aims to provide a work machine engine stopping system and a work machine engine stopping method that are capable of canceling control that delays engine stoppage while that control is being performed. [Means for solving the problem]

[0006] One aspect of the present disclosure is a display system for a work machine that includes a display unit that displays an image of the surroundings of the work machine as well as functions related to delayed stop control of an engine 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, it is possible to cancel the control that is delaying engine stop during the control. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram showing the configuration of a work machine according to an embodiment of the present disclosure. FIG. [Figure 2] FIG. 2 is a diagram illustrating the internal configuration of a driver's cab according to an embodiment of the present disclosure. [Figure 3] 1A and 1B are diagrams illustrating a configuration of a rotary switch according to an embodiment of the present disclosure. [Figure 4] 10A and 10B are diagrams illustrating an example of the operation of a lock lever according to an embodiment of the present disclosure. [Figure 5] FIG. 1 is a schematic block diagram illustrating a hardware configuration of a control system according to an embodiment of the present disclosure. [Figure 6] 10 is a flowchart illustrating an example of operation of a control system according to an embodiment of the present disclosure. [Figure 7] FIG. 10 is a diagram illustrating a display example according to an embodiment of the present disclosure. [Figure 8] FIG. 10 is a diagram illustrating a display example according to an embodiment of the present disclosure. [Figure 9] FIG. 10 is a diagram illustrating a display example according to an embodiment of the present disclosure. [Figure 10] FIG. 10 is a diagram illustrating a display example according to an embodiment of the present disclosure. [Figure 11] FIG. 10 is a diagram illustrating a display example according to an embodiment of the present disclosure. [Figure 12] FIG. 1 is a functional block diagram according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF 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 designated by the same reference numerals, and the description thereof will be omitted as appropriate.

[0010] (Configuration of work machine 100) FIG. 1 is a schematic diagram showing the configuration of a work machine 100 according to an embodiment of the present disclosure. The work machine 100 operates at a construction site and works on a construction target such as earth and sand. The work machine 100 according to an embodiment of the present disclosure is, for example, a hydraulic excavator. However, the work machine according to the present disclosure may also be other work machines such as a dump truck, a wheel loader, or a motor grader. The work machine 100 includes a running body 110, a revolving body 120, a work implement 130, and a cab 140. The work machine 100 according to an embodiment of the present disclosure authenticates the operator by wirelessly communicating with an operator terminal 300, such as a smartphone carried by the operator, using a short-range wireless communication method.

[0011] The running body 110 supports the work machine 100 so that it can travel. The running body 110 is equipped with two tracks 111 provided on the left and right, and two travel motors 112 for driving each track 111. The rotating body 120 is supported on the running body 110 so that it can rotate around a rotation center.

[0012] The work implement 130 is hydraulically driven. The work implement 130 is supported on the front part of the revolving unit 120 so that it can be driven in the vertical direction. The cab 140 is a space where an operator sits and operates the work machine 100. The cab 140 is provided on the left front part of the revolving unit 120. In this embodiment, as shown in FIG. 1 , the up / down, left / right, and front / rear directions are defined with respect to the revolving unit 120 as the reference. Also, the part of the revolving unit 120 to which the work implement 130 is attached is referred to as the front part. Furthermore, with respect to the revolving unit 120, the part opposite the front part is referred to as the rear part, the left part as the left part, and the right part as the right part.

[0013] (Configuration of rotating body 120) The swing body 120 includes an engine 121, a hydraulic pump 122, a control valve 123, a swing 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 provided in the engine 121. The engine 121 is started by the rotation of the starter motor 1211.

[0014] The hydraulic pump 122 is a variable displacement pump driven by the engine 121. The hydraulic pump 122 supplies hydraulic oil to each actuator via 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 hydraulic oil supplied from the hydraulic pump 122.

[0015] The swing motor 124 is driven by hydraulic oil supplied from a hydraulic pump 122 via a control valve 123, and swings the swing body 120. A fuel injection device 125 injects fuel into the engine 121.

[0016] (Configuration of work machine 130) The work implement 130 includes a boom 131, an arm 132, a bucket 133, a boom cylinder 131C, an arm cylinder 132C, and a bucket cylinder 133C.

[0017] The base end of the boom 131 is attached to the rotating body 120 via a boom pin. The arm 132 connects the boom 131 and the bucket 133. The base end of the arm 132 is attached to the tip of the boom 131 via an arm pin. The bucket 133 has a blade for excavating earth and sand and a storage section for storing the excavated earth and sand. The base end of the bucket 133 is attached to the tip of the arm 132 via a bucket pin.

[0018] The boom cylinder 131C is a hydraulic cylinder for operating the boom 131. A base end of the boom cylinder 131C is attached to the revolving unit 120. A tip end of the boom cylinder 131C is attached to the boom 131. The arm cylinder 132C is a hydraulic cylinder for driving the arm 132. A base end of the arm cylinder 132C is attached to the boom 131. A tip end of the arm cylinder 132C is attached to the arm 132. The bucket cylinder 133C is a hydraulic cylinder for driving the bucket 133. A base end of the bucket cylinder 133C is attached to the arm 132. A tip end of the bucket cylinder 133C is attached to a link member connected to the bucket 133.

[0019] (Configuration of the driver's cab 140) A door 141 for an operator to board is provided on the left side of the operator's cab 140. The door 141 is provided with a lock actuator 1411 for locking the door 141 and a door switch 1412 for unlocking the door.

[0020] FIG. 2 is a diagram illustrating the internal configuration of a cab 140 according to an embodiment of the present disclosure. FIG. 3 is a diagram illustrating the configuration of a rotary switch 144 according to an embodiment of the present disclosure. FIG. 4 is a diagram illustrating an example of the operation of a lock lever 143LL according to an embodiment of the present disclosure. A driver's seat 142, an operating device 143, a rotary switch 144, and a touch panel 145D are provided inside the cab 140. As shown in FIG. 3, the rotary switch 144 is a switch that takes four positions: an OFF position 1442, an ACC (accessory) position 1443, an IG (ignition) position 1444, and an ST (start) position 1445, when a rotating portion 1441 is rotated as indicated by the dashed arrows. Note that when the rotary switch 144 is released from the ST position 1445, a spring mechanism (not shown) automatically returns the switch to the IG position 1444. The OFF position 1442 commands the engine 121 to be stopped. An instruction to stop the engine 121 is given at the ACC position 1443, and an instruction to put certain devices into operation is given. An instruction to put the engine 121 into operation is given at the IG position 1444. An instruction to start the engine 121 is given at the ST position 1445.

[0021] In this disclosure, rotary switch 144 is an example of an engine ignition switch. Instead of a rotary switch, the ignition switch may be configured as a key switch or a push switch. Rotary switch 144 outputs an electrical signal corresponding to OFF position 1442, ACC position 1443, IG position 1444, or ST position 1445.

[0022] The operation device 143 is a device for driving the traveling body 110, the revolving body 120, and the work machine 130 through manual operation by an operator. The operation device 143 includes a left operation lever 143LO, a right operation lever 143RO, a left foot pedal 143LF, a right foot pedal 143RF, a left travel lever 143LT, a right travel lever 143RT, and a lock lever 143LL.

[0023] The left operating lever 143LO is provided on the left side of the driver's seat 142. The right operating lever 143RO is provided on the right side of the driver's seat 142.

[0024] The left operation lever 143LO is an operation mechanism for performing the swing operation of the swing unit 120 and the excavation / dumping operation of the arm 132. Specifically, when the operator of the work machine 100 tilts the left operation lever 143LO forward, the arm 132 performs the dumping operation. When the operator of the work machine 100 tilts the left operation lever 143LO rearward, the arm 132 performs the excavation operation. When the operator of the work machine 100 tilts the left operation lever 143LO to the right, the swing unit 120 swings to the right. When the operator of the work machine 100 tilts the left operation lever 143LO to the left, the swing unit 120 swings to the left. Note that in other embodiments, when the left operation lever 143LO is tilted forward or backward, the swing unit 120 may swing to the right or left, and when the left operation lever 143LO is tilted left or right, the arm 132 may perform the excavation or dumping operation.

[0025] The right operating lever 143RO is an operating mechanism for performing an excavation / dumping operation of the bucket 133 and a raising / lowering operation of the boom 131. Specifically, when the operator of the work machine 100 tilts the right operating lever 143RO forward, a lowering operation of the boom 131 is performed. Conversely, when the operator of the work machine 100 tilts the right operating lever 143RO rearward, a raising operation of the boom 131 is performed. Conversely, when the operator of the work machine 100 tilts the right operating lever 143RO to the right, a dumping operation of the bucket 133 is performed. Conversely, when the operator of the work machine 100 tilts the right operating lever 143RO to the left, an excavation operation of the bucket 133 is performed. Note that in other embodiments, when the right operating lever 143RO is tilted forward or backward, the bucket 133 may perform a dumping operation or an excavation operation, and when the right operating lever 143RO is tilted left or right, the boom 131 may perform a raising or lowering operation.

[0026] The left foot pedal 143LF is located on the left side of the floor in front of the driver's seat 142. The right foot pedal 143RF is located on the right side of the floor in front of the driver's seat 142. The left travel lever 143LT is pivotally supported by the left foot pedal 143LF, and is configured so that tilting the left travel lever 143LT and pressing down the left foot pedal 143LF are linked. The right travel lever 143RT is pivotally supported by the right foot pedal 143RF, and is configured so that tilting the right travel lever 143RT and pressing down the right foot pedal 143RF are linked.

[0027] The left foot pedal 143LF and left travel lever 143LT correspond to the rotational drive of the left crawler belt of the traveling body 110. Specifically, when the operator of the work machine 100 pushes the left foot pedal 143LF or the left travel lever 143LT forward, the left crawler belt rotates in the forward direction. Conversely, when the operator of the work machine 100 pushes the left foot pedal 143LF or the left travel lever 143LT backward, the left crawler belt rotates in the reverse direction.

[0028] The right foot pedal 143RF and the right traveling lever 143RT correspond to the rotational drive of the right crawler belt of the traveling body 110. Specifically, when the operator of the work machine 100 pushes the right foot pedal 143RF or the right traveling lever 143RT forward, the right crawler belt rotates in the forward direction. Conversely, when the operator of the work machine 100 pushes the right foot pedal 143RF or the right traveling lever 143RT backward, the right crawler belt rotates in the reverse direction.

[0029] The lock lever 143LL is a safety device provided to prevent the operator from unintentionally operating actuators of the work implement 130 or the like when the vehicle is not in operation. The lock lever 143LL is disposed along the side of a left console box 142LC that is erected on the left side of the driver's seat 142, in a state in which it can rotate between a locked position and an unlocked position. In FIG. 4, the lock lever 143LL is indicated by a solid line as being in the locked position, and the lock lever 143LL is indicated by a dotted line as being in the unlocked position. By placing the lock lever 143LL in the locked position, control of the hydraulic oil by the control valve 123 is stopped. Furthermore, by placing the lock lever 143LL in 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 implement 130 being in a locked state. Furthermore, the state in which the lock lever 143LL is in the unlocked position is an example of the work implement 130 being in an unlocked state.

[0030] When the lock lever 143LL is in the locked position, the lock lever 143LL rotates to a position hidden by the side of the left console box of the driver's seat 142, that is, to a position retracted from the passage between the door 141 and the driver's seat 142, and is locked. This allows the operator to move between the door 141 and the driver's seat 142. On the other hand, when the lock lever 143LL is in the unlocked position, the lock lever 143LL rotates to a position tilted forward and locked so as to block the passage between the driver's seat 142 and the door 141. This prevents the operator from leaving the driver's cab 140 while actuators of the work equipment 130 and the like are operable. The on / off state of the switch that operates in conjunction with the lock lever 143LL is monitored, for example, by the controller 205, which will be described later.

[0031] (Example of camera configuration) The revolving unit 120 is provided with a plurality of cameras 126 that capture images of the surroundings of the work machine 100. In the example shown in Fig. 1, the revolving unit 120 is provided with four cameras 126: a camera that captures images of the front area around the revolving unit 120, a camera that captures images of the left side area, a camera that captures images of the rear area, and a camera that captures images of the right side area.

[0032] (Configuration of control system 145) Fig. 5 is a schematic block diagram showing a hardware configuration of a control system 145 according to an embodiment of the present disclosure. In Fig. 5, solid lines represent power lines, dashed lines represent signal lines, and dashed lines represent wireless communication.

[0033] The control system 145 includes 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 one another via an in-vehicle network such as a Controller Area Network (CAN) or Ethernet (registered trademark). The power supply unit 201 supplies electrical energy to each device that constitutes the control system 145.

[0034] The starter signal unit 202 receives signal inputs from the door switch 1412, the rotary switch 144, the operator terminal 300, and the monitor controller 204. Based on the input signals, the starter signal unit 202 outputs control signals such as a start signal to the gateway function controller 203, the monitor controller 204, the control controller 205, the engine controller 206, the lock actuator 1411, or the starter motor 1211. A controller to which a start signal is input is started and operates by electrical energy supplied by the power supply unit 201. The starter signal unit 202 is an example of a starter unit that starts the control controller 205. Note that the starter signal unit 202 always operates by receiving electrical energy supplied from the power supply unit 201, even when the other controllers are in a stopped state. On the other hand, when the work machine 100 is not started, the starter signal unit 202 may be configured so that only the unit that communicates with the operator terminal 300 is in an activated state, and the other components are in a stopped state, or may be activated intermittently.

[0035] The starter signal unit 202 also 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 via the gateway function controller 203. The EDS (engine delayed shutdown) signal is a signal that indicates the execution status of delayed stop control. In this embodiment, delayed stop control is control that, when a stop command to stop the engine 121 of the work machine 100 is received, delays the stopping of the engine 121 until predetermined conditions are met, and then stops the engine 121. The starter signal unit 202 also determines, for example, whether to start delayed stop control, whether to cancel delayed stop control, and whether to end delayed stop control. When the EDS signal is on, this indicates that delayed stop control is being executed, and when it is off, this indicates that delayed stop control is not being executed. Here, the predetermined condition is a condition for determining whether to stop the engine 121. When the predetermined condition is met, the engine 121 is stopped, and when 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 a urea water injector in a urea SCR (Selective Catalytic Reduction) system, or engine-related temperatures, is below a predetermined temperature threshold, or that the duration of the engine 121 operating, for example, at low speed idling, is greater than or equal to 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 the rotary switch 144 is in the OFF position 1442. The IGON (ignition on) signal is turned on when the rotary switch 144 is in the IG position 1444 or the ST position 1445, and is turned off when the rotary switch 1444 is in the OFF position 1442 or the ACC position 1443, for example.

[0036] In addition, the starter signal unit 202 inputs, via the gateway function controller 203, from the monitor controller 204, the control controller 205, the engine controller 206, etc., a signal indicating whether the lock lever 143LL is in the locked position or the unlocked position, a signal indicating the temperature used when determining predetermined conditions in delayed stop control, or a signal indicating the result of that determination.

[0037] The gateway function controller 203 relays communications between controllers such as the starter signal unit 202, the monitor controller 204, the control controller 205, and the engine controller 206.

[0038] Monitor controller 204 controls the display on touch panel 145D included in control system 145 and notifies the occurrence of a touch operation on touch panel 145D. Note that control system 145 according to another embodiment may include a monitor without a touch input function, such as an LCD (Liquid Crystal Display), and physical buttons, instead of touch panel 145D. In this case, monitor controller 204 controls the display on the monitor and notifies the occurrence of a press of a physical button.

[0039] The control controller 205 acquires various types of data relating to the hydraulic equipment that controls the operation of the work machine 130 using sensors (not shown), and outputs control signals for controlling the hydraulic equipment in accordance with the operation of the operation device 143. In other words, the control controller 205 controls the drive of the boom cylinder 131C, arm cylinder 132C, bucket cylinder 133C, travel motor 112, swing motor 124, etc. The control controller 205 is an example of a vehicle body control unit that outputs control signals for driving the vehicle body of the work machine 100 using power supplied by a power source.

[0040] The engine controller 206 acquires various data related to the engine 121 using sensors (not shown) and controls the engine 121 by instructing the fuel injection device 125 on the amount of fuel injection.

[0041] The monitor controller 204, the control controller 205, the engine controller 206, etc. receive control signals such as the EDS signal, the ACCON signal, and the IGON signal from the starter signal unit 202 and execute preset processes based on the control signals such as the EDS signal, the ACCON signal, and the IGON signal. For example, the monitor controller 204 displays the screen of the touch panel 145D when the IGON signal is on or when the ACCON signal is on. For example, the monitor controller 204 turns off the screen display of the touch panel 145D when the IGON signal is off and the ACCON signal is off. For example, the control controller 205 stops driving the work implement 130 when the EDS signal is on. For example, the engine controller 206 operates the engine 121 in a low-speed idling state when the EDS signal is on. Furthermore, the engine controller 206 stops the engine 121 when the IGON signal is off.

[0042] The control system 145 has a function of performing login processing for the operator in the cab 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 via the monitor controller 204, and accepts the selection of the operator ID. If the selected operator ID indicates an operator who is close to the work machine 100 and has operation authority, the control system 145 authenticates that the operator in the cab 140 is an operator who has operation authority. The monitor controller 204 is an example of an authentication unit that authenticates the operator of the work machine 100.

[0043] (Operator terminal 300) The operator terminal 300 functions as a short-range wireless communication peripheral by executing a pre-installed startup program for the work machine 100. When the startup program is executed, the operator terminal 300 displays a list of the work machines 100 and accepts the operator's selection of the work machine 100 to be started. When the operator terminal 300 accepts the selection of the work machine 100, it begins transmitting an advertising packet that includes, for example, the operator ID and the machine ID of the selected work machine 100.

[0044] (Operation of control system 145) Next, an example of operation of delayed stop control performed by the control system 145 will be described with reference to Fig. 6 to Fig. 11. Fig. 6 is a flowchart showing an example of operation of the control system 145 according to an embodiment of the present disclosure. Figs. 7 to 11 are diagrams showing display examples of the touch panel 145D according to an embodiment of the present disclosure.

[0045] The processing shown in Fig. 6 is started after the engine 121 has been started. It is assumed that, 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. The touch panel 145D also displays a normal display screen 145D1, which is the display when delayed stop control is not being executed, as shown in Fig. 7, for example. The normal display screen 145D1 includes an overhead image 145DA11 based on images captured by the four cameras 126 and a computer graphics image of the work machine 100, an image 145DA12 captured by one of the four cameras 126, predetermined sensor information for the work machine 100, icons representing operation buttons, and the like.

[0046] In the following description, as an example, the starter signal unit 202 of the control system 145 will be assumed to be the primary processor of each step. However, some or all of the processing of each step may be primarily executed by the monitor controller 204, the control controller 205, the engine controller 206, or the like, instead of the starter signal unit 202. In addition, in FIG. 6, the rotary switch 144 is abbreviated as "R-SW." Furthermore, the delayed stop control is abbreviated as "EDS."

[0047] 6 starts, 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 the rotary switch 144 is not in the ACC position 1443 and not in the OFF position 1442 (step S11: NO), the starter signal unit 202 repeatedly executes the determination in step S11 at a predetermined cycle.

[0048] If 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 or not an activation condition for delayed stop control (EDS activation condition) is met (step S12). The activation condition for delayed stop control is a condition for determining whether or not to start delayed stop control. If the activation condition for delayed stop control is met, the starter signal unit 202 starts delayed stop control and stops the engine 121 under delayed stop control. If the activation condition for delayed stop control is not met, the starter signal unit 202 stops the engine 121 without performing delayed stop control. The activation condition for delayed stop control is, for example, that the temperature at one or more predetermined locations in the exhaust system or the like is equal to or higher than each predetermined temperature threshold. The predetermined temperature threshold is, for example, a temperature value at which it is not desirable to stop the engine 121 when the temperature is equal to or higher than the temperature threshold.

[0049] If the conditions for operating the delayed stop control are met (step S12: YES), the starter signal unit 202 sets the EDS signal to ON (step S13) and displays a delay stop control in operation display on the touch panel 145D (step S14), indicating that the delayed stop control is in operation. FIG. 8 shows an example of a display screen 145D2 for displaying that the delayed stop control is in operation. The display screen 145D2 includes an overhead image 145DA11 and a display area 145DA2 indicating that the delayed stop control is in operation. In this case, the display area 145DA2 indicates that the delayed stop control is in operation by displaying the text "Engine delay shutdown in operation."

[0050] Next, the starter signal unit 202 determines whether or not an end condition for the delayed stop control (EDS end condition) is satisfied (step S15). The end condition for the delayed stop control is a condition for determining whether or not to stop the engine 121 and end the delayed stop control. If the end condition for the delayed stop control is satisfied, the starter signal unit 202 stops the engine 121 and ends the delayed stop control. The end condition for the delayed stop control is, for example, that the temperature at one or more predetermined locations in the exhaust system or the like is below each predetermined temperature threshold. The predetermined temperature threshold is, for example, a temperature value below which the engine 121 can be stopped appropriately. Alternatively, the end condition for the delayed stop control is, for example, that a predetermined time or more has elapsed since the start of the delayed stop control. The predetermined time is, for example, a time sufficient for the temperature to decrease.

[0051] If 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 delayed stop control termination notification on the touch panel 145D (step S17), indicating that the delayed stop control has terminated. FIG. 9 shows an example of a display screen 145D3 for displaying the delayed stop control termination notification. The display screen 145D3 includes an overhead image 145DA11 and a display area 145DA3 indicating that the delayed stop control has terminated. In this case, the display area 145DA3 indicates that the delayed stop control has terminated with the text "Engine delay shutdown has terminated."

[0052] When the delayed stop control end notification display is performed on the touch panel 145D (step S17), or when the delayed stop control activation condition is not satisfied (step S12: NO), the starter signal unit 202 sets the IGON signal to OFF (step S18). When the IGON signal is turned OFF, the engine controller 206 stops the engine 121.

[0053] Next, the starter signal unit 202 determines whether the rotary switch 144 is at the ACC position 1443 (step S19). If the rotary switch 144 is at the ACC position 1443 (step S19: YES), and if the starter signal unit 202 has displayed a delayed stop control end notification in step S17, the starter signal unit 202 displays the normal display screen 145D1 on the touch panel 145D after a predetermined time has elapsed since the delayed stop control end notification was displayed in step S17 (step S20). If the rotary switch 144 is at the ACC position 1443 (step S19: YES), the starter signal unit 202 continues to display the normal display screen 145D1 on the touch panel 145D (step S20).

[0054] On the other hand, if the rotary switch 144 is not at the ACC position 1443 (step S19: NO), the starter signal unit 202 determines whether the rotary switch 144 is at the OFF position 1442 (step S21). If the rotary switch 144 is at the OFF position 1442 (step S21: YES), when the starter signal unit 202 has displayed a delayed stop control end notification display in step S17, the starter signal unit 202 turns off the display on the touch panel 145D after a predetermined time has elapsed since the delayed stop control end notification display was displayed, and ends the processing shown in Fig. 6. If the delayed stop control activation conditions are not met in step S12, the starter signal unit 202 turns off the display on the touch panel 145D after a predetermined time has elapsed (step S22), and ends the processing shown in Fig. 6.

[0055] Also, if 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 executes processing according to the position of the rotary switch 144.

[0056] On the other hand, if the termination condition of the delayed stop control is not satisfied in step S15 (step S15: NO), the starter signal unit 202 determines whether or not the rotary switch 144 is at the IG position 1444 (step S23). If the rotary switch 144 is not at the IG position 1444 (step S23: NO), the starter signal unit 202 determines again after a predetermined time period whether or not the termination condition of the delayed stop control (EDS termination condition) is satisfied (step S15).

[0057] If the rotary switch 144 is at the IG position 1444 (step S23: YES), the starter signal unit 202 determines whether the lock lever 143LL is at the lock position (step S24). If the lock lever 143LL is at the lock position (step S24: YES), the starter signal unit 202 sets the EDS signal to OFF (step S25) and displays a cancellation acceptance display on the touch panel 145D, indicating that the cancellation of the delayed stop control has been accepted (step S26). FIG. 10 shows an example of a display screen 145D4 for the cancellation acceptance display. The display screen 145D4 includes an overhead image 145DA11 and a display area 145DA4 indicating that the delayed stop control has been canceled. In this case, the display area 145DA4 indicates that the delayed stop control has been canceled by displaying the text "Engine delayed shutdown has been canceled."

[0058] Next, the starter signal unit 202 displays the normal display screen 145D1 on the touch panel 145D after a predetermined time has elapsed since the cancellation acceptance display was performed in step S26 (step S27). Next, the starter signal unit 202 executes the process of step S11 again.

[0059] On the other hand, if the lock lever 143LL is not in the locked position (step S24: NO), the starter signal unit 202 displays a cancel refusal display on the touch panel 145D, indicating that the cancellation of the delayed stop control is rejected (step S28). FIG. 11 shows an example of a display screen 145D5 for the cancellation acceptance display. The display screen 145D5 includes an overhead image 145DA11 and a display area 145DA5 indicating that the cancellation of the delayed stop control has been rejected. In this case, the display area 145DA5 displays the text "To cancel the engine delayed shutdown, move the lock lever to the locked position and then set the key to IG-ON," indicating that the cancellation of the delayed stop control has been rejected and urging the user to move the lock lever 143LL to the locked position. The display area 145DA5 also includes an image showing how to operate the rotary switch 144.

[0060] After displaying a cancellation refusal display on the touch panel 145D (step S28), the starter signal unit 202 determines again after a predetermined time whether the termination condition for the delayed stop control (EDS termination condition) is met (step S15).

[0061] By the above processing, for example, when the operator operates the rotary switch 144 to the OFF position 1442 while the engine 121 is running, if the activation conditions for the delayed stop control are not met (step S12: NO), the control system 145 stops the engine 121 (step S18) and turns off the touch panel 145D (step S22).

[0062] Furthermore, for example, when the operator operates the rotary switch 144 to the OFF position 1442 while the engine 121 is running, if the conditions for activating the delayed stop control are met (step S12: YES), the control system 145 displays a message on the touch panel 145D indicating that the delayed stop control is in operation (FIG. 8) (step S14), and when the conditions for terminating the delayed stop control are met (step S15: YES), the control system 145 displays a message on the touch panel 145D indicating that the delayed stop control has been terminated (FIG. 9) (step S17), stops the engine 121 (step S18), and turns off the touch panel 145D (step S22).

[0063] Furthermore, if the operator operates the rotary switch 144 to the IG position 1444 (step S23: YES) before the termination condition for the delayed stop control is met (step S15: NO), and the lock lever 143LL is in the locked position (step S24: YES), the control system 145 will cancel the delayed stop control (step S25), display a cancellation acceptance message (FIG. 10) on the touch panel 145D (step S26), and then display the normal message (FIG. 7) (step S27).

[0064] On the other hand, if the operator operates the rotary switch 144 to the IG position 1444 (step S23: YES) before the termination condition for the delayed stop control is met (step S15: NO), and the lock lever 143LL is not in the locked position (step S24: NO), the control system 145 displays a cancellation refusal message (FIG. 11) (step S28) and continues the delayed stop control (step S15 and thereafter).

[0065] (Actions and Effects) As described above, according to this 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 is delaying the stop of the engine 121. Furthermore, in this embodiment, when the rotary switch 144 is operated to the IG position 1444, an additional condition for stopping the delay stop control is that the lock lever 143LL is in the locked position. This means that when the delay stop control is stopped, the lock lever 143LL is in the locked position, making it 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.

[0066] (Other embodiments) Although one embodiment has been described in detail above with reference to the drawings, the specific configuration is not limited to the above, and various design modifications are possible. That is, in other embodiments, the order of the above-described processes may be changed as appropriate. Furthermore, some processes may be executed in parallel. Furthermore, information may be output by voice or a notification signal instead of or in addition to displaying information on the touch panel 145D. In the above embodiment, an instruction to stop the delayed stop control is issued by operating the rotary switch 144 to the IG position 1444. However, this is not limiting. For example, in addition to operating the rotary switch 144 to the IG position 1444, an instruction to stop the delayed stop control may be issued 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.

[0067] In the control system 145 according to the embodiment described above, some of the components that make up the control system 145 may be mounted inside the work machine 100, and other components may be provided outside the work machine 100.

[0068] (Computer Configuration) Each of the devices included in the control system 145, such as the starter signal unit 202, the gateway function controller 203, the monitor controller 204, the control controller 205, and the engine controller 206, can be configured using a computer such as a microcomputer or a central processing unit (CPU), and hardware such as computer peripheral circuits and peripheral devices. The computer may also be configured using a custom large-scale integrated circuit (LSI) such as a programmable logic device (PLD). Examples of PLDs include programmable array logic (PAL), generic array logic (GAL), complex programmable logic device (CPLD), and field programmable gate array (FPGA). In this case, some or all of the functions implemented by the processor may be implemented by the integrated circuit.

[0069] (Basic configuration example) Next, a basic configuration example according to an embodiment of the present disclosure corresponding to the above embodiment will be described with reference to Fig. 12. Fig. 12 is a functional block diagram according to an embodiment of the present disclosure. A stop system 400 shown in Fig. 12 has a configuration corresponding to the control system 145 shown in Fig. 5, and includes an engine stop control unit 401, an engine stop control cancel unit 402, and a display unit 403. However, the display unit 403 may be omitted.

[0070] When a stop command is received to stop the engine 121 of the work machine 100, the engine stop control unit 401 executes delayed stop control to delay stopping of the engine 121 until a predetermined condition is met and then stops the engine 121. Here, the stop command corresponds to, for example, an input operation to set 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 the starter signal unit 202 that performs the determination processing in step S11, the determination processing in step S15, the processing in step S18, etc.

[0071] When a cancel instruction to cancel the stop instruction is received (step S23: YES), the engine stop control canceling unit 402 cancels the delayed stop control (step S25) if the lock lever 143LL of the work machine 100 is in the locked position (step S24: YES), and continues the delayed stop control if the lock lever 143LL is in the unlocked position (step S24: NO). Here, the cancel instruction corresponds to, for example, an input operation to switch the rotary switch 144 from the OFF position 1442 or the ACC position 1443 to the IG position 1444. The engine stop control canceling unit 402 corresponds to the starter signal unit 202 that performs the determination processing of step S23, the determination processing of step S24, the processing of step S25, etc.

[0072] In addition, the engine stop control canceling unit 402 may cancel the delayed stop control when a cancellation command is received (step S23: YES) and the lock lever 143LL is in the non-locked position (step S24: NO), and then when a cancellation command is received again (step S23: YES) and the lock lever 143LL is in the locked position (step S24: YES).

[0073] In addition, when a cancellation instruction is received (step S23: YES), the display unit 403 may change the display content to a cancellation acceptance display (step S26) or a cancellation refusal display (step S28) depending on whether the lock lever 143LL is in the locked position (step S24: YES) or the unlocked position (step S24: NO).

[0074] Furthermore, when a cancellation instruction is received (step S23: YES), and the lock lever 143LL is in the unlocked position (step S24: NO), the display unit 403 may display a message (FIG. 11) urging the user to move the lock lever 143LL to the locked position (step S28).

[0075] Furthermore, when a cancellation instruction is received (step S23: YES), and the lock lever 143LL is in the lock position (step S24: YES), the display unit 403 may display (FIG. 10) that the delayed stop control will be canceled (step S26).

[0076] The cancel instruction is issued, 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.

[0077] Alternatively, the cancellation instruction is given by turning on the ignition switch of engine 121 and performing a predetermined input operation on a predetermined input device. Here, the predetermined input operation on the predetermined input device corresponds to a predetermined input operation on a predetermined input device such as touching a predetermined button on touch panel 145D or pressing a predetermined switch, which are shown as modified examples of the above embodiment.

[0078] According to the engine stopping system 400 of a work machine shown in FIG. 12, it is possible to cancel the control during the control that delays the stopping of the engine.

[0079] The stopping system 400 according to this embodiment also functions as a “display system” for the work machine 100 .

[0080] That is, as shown in Figures 8 to 11, the display system for the work machine 100 is equipped with a display unit 403 that displays an image of the surroundings of the work machine 100 as well as functions related to delayed stop control of the engine of the work machine 100. Here, the image of the surroundings of the work machine 100 is, for example, an overhead image 145DA11 that shows the surroundings of the work machine 100 from above, as shown in Figures 8 to 11. However, other embodiments are not limited to this, and the image of the surroundings of the work machine 100 may be in any form as long as it allows the operator to grasp the status of workers, obstacles, etc. that are present around the work machine 100. Moreover, the display of the function relating to delayed stop control of the engine of the work machine 100 is, for example, display areas 145DA2 to 145DA5 shown in Figs. 8 to 11, respectively. In this way, the operator can grasp the status of the functions relating to delayed stop control while checking the safety conditions around the work machine 100.

[0081] Additionally, as an example of the display of a function related to delayed stop control of the engine of the work machine 100, the display unit 403 displays a message indicating that delayed stop control of the engine of the work machine 100 is in operation, as shown in display area 145DA2 in Figure 8, for example. In this way, the operator can grasp the situation around the work machine 100 as well as the fact that delayed stop control is in operation.

[0082] The display system further includes an engine stop control canceling unit 402 that cancels the delayed engine stop control based on receipt of a command to cancel the delayed engine stop control of the work machine 100 (the cancellation command described above). The display unit 403 then displays, as an example of the display of functions related to delayed stop control of the engine of the work machine 100, a display for accepting cancellation of delayed stop control of the engine of the work machine 100, as shown in display area 145DA5 in FIG. 11, for example. In this way, the operator can grasp the situation around the work machine 100 as well as the operation required to cancel the delayed engine stop control.

[0083] Additionally, as an example of the display of a function related to delayed stop control of the engine of the work machine 100, the display unit 403 displays a message indicating that delayed stop control of the engine of the work machine 100 has been canceled, as shown in display area 145DA4 in FIG. 10, for example. In this way, the operator can grasp the situation around the work machine 100 as well as the fact that the delayed engine stop control has been canceled.

[0084] In this embodiment, acceptance of the cancellation of delayed stop control of the engine of the work machine 100 has been described as the lock lever being placed in the locked position and the key position being placed in IG-ON, but in other embodiments, this is not limited to this form. For example, the cancellation of delayed stop control of the engine of the work machine 100 may be accepted based on an operation on the monitor (touch panel 145D) by the operator. Specifically, the operator may accept the cancellation of delayed stop control by performing a touch operation on a dedicated button displayed on the monitor. In this way, the operator can perform the operation to cancel the delayed stop control while checking the image of the surroundings of the work machine 100 displayed on the monitor. In other words, the operator does not need to take his or her eyes off the image of the surroundings until the operation to cancel the delayed stop control is performed, which further improves safety.

[0085] Furthermore, the engine stop control canceling unit 402 of the stop system 400 according to this embodiment has been described as canceling the delayed stop control when the lock lever 143LL of the work machine 100 is in the locked position if there is a cancel command to cancel the engine stop command, and continuing the delayed stop control when the lock lever 143LL is in the unlocked position. However, other embodiments are not limited to this. That is, the stop system 400 according to another embodiment may always cancel the delayed stop control when a cancellation command is received, regardless of the position of the lock lever 143LL. As described above, the stop system 400 (display system) described above makes it possible to grasp the status of the functions related to the delayed stop control while checking the safety conditions around the work machine 100 from images.

[0086] Furthermore, a display system according to a further modification may have the following functions. That is, the display system may detect the presence of an obstacle or the like from image analysis of images of the periphery of the work machine 100, and may not accept a request to stop engine delayed stop control if an obstacle or the like is present. Note that a known trained model using neural network technology, for example, can be applied to the image analysis described above. [Explanation of symbols]

[0087] 100...Work machine 110...Traveling body 120...Swing body 130...Work machine 140...Operator's 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 cancellation unit 403...Display unit

Claims

1. a display unit that displays an image of the surroundings of the work machine as well as functions related to delayed stop control of the engine of the work machine; an engine stop control canceling unit that cancels the delayed stop control of the engine of the work machine based on acceptance of cancellation of the delayed stop control of the engine of the work machine; Equipped with the display unit displays an image of the surroundings of the work machine on the same screen as a display for accepting cancellation of delayed stop control of the engine of the work machine, The acceptance of the cancellation of the delayed stop control of the engine of the work machine is based on an operation of an ignition switch or a monitor. Display system for work machines.

2. the display unit displays an image of the surroundings of the work machine together with a display indicating that delayed stop control of the engine of the work machine is in operation.

10. A display system for a work machine according to claim 1.

3. the display unit displays an image of the surroundings of the work machine together with a display indicating that delayed stop control of the engine of the work machine has been canceled. A display system for a work machine according to claim 1 or 2.

4. the image of the surroundings of the work machine is an overhead image of the surroundings of the work machine viewed from above, A display system for a work machine according to any one of claims 1 to 3.

5. displaying an image of the surroundings of the work machine together with a function related to delayed stop control of the engine of the work machine; canceling the delayed stop control of the engine of the work machine based on acceptance of a request to stop the delayed stop control of the engine of the work machine; Equipped with In the step of displaying, a display for accepting cancellation of delayed stop control of the engine of the work machine is performed together with an image of the surroundings of the work machine on the same screen, The acceptance of the cancellation of the delayed stop control of the engine of the work machine is based on an operation of an ignition switch or a monitor. Display method for work machines.

6. In the display step, a display indicating that delayed stop control of the engine of the work machine is in operation is displayed together with an image of the surroundings of the work machine.

6. The display method for a work machine according to claim 5.

7. In the display step, a display indicating that delayed stop control of the engine of the work machine has been canceled is displayed together with an image of the surroundings of the work machine.

7. A display method for a work machine according to claim 5 or 6.

8. the image of the surroundings of the work machine is an overhead image of the surroundings of the work machine viewed from above, A display method for a work machine according to any one of claims 5 to 7.

Images