JP2015206427A - Vehicle equipped with pto - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle equipped with a PTO (Power Take-Off), which is improved in usability by allowing quick return to normal traveling without temporarily stopping the vehicle when releasing a PTO mechanism by OFF operation of a PTO switch during traveling of the vehicle.SOLUTION: A vehicle comprises a mechanical transmission, an engine, a clutch, a PTO, a PTO S/W, a shift control device for controlling the shift of a gear stage of the mechanical transmission, a clutch control device, and a PTO control device for controlling the connection and disconnection of the PTO. The PTO control device, when the mechanical transmission is in a running state and the PTO S/W is turned off, disconnects the PTO after the clutch control device disengages the clutch and the shift control device sets the mechanical transmission at a N range. The shift control device changes the mechanical transmission to a target gear stage after the PTO is disconnected from the mechanical transmission.

Description

  The present disclosure relates to a PTO-equipped vehicle including a transmission PTO (Power-Take-Off) that extracts power from a power unit for purposes other than traveling, and more particularly, to a power cutoff method at the end of work by the PTO.

Conventionally, special vehicles including cargo handling vehicles such as garbage trucks and dump trucks include PTO-equipped vehicles equipped with a PTO mechanism that extracts engine power for purposes other than traveling.
Such PTO-equipped vehicles such as trucks are also equipped with an automatic transmission in order to save fuel and facilitate driving operation.

In Patent Document 1, in a clutch automatic control type vehicle with a PTO mechanism that automatically controls a clutch according to a shift lever operation, a PTO mechanism is connected to a transmission to a control unit that controls connection / disconnection of the transmission clutch and the PTO mechanism. And the technique which interrupts | blocks a PTO mechanism when shift lever operation is performed during driving | running | working is disclosed.
By doing so, if a shift is attempted while running while the PTO mechanism is operating, the PTO will stop when the gear is pulled out to neutral, so that the synchro mechanism is protected from an excessive load. Further, since the PTO mechanism can be automatically stopped by performing a speed change operation, the driving operation is said to be comfortable.

JP 2003-28285 A

  By the way, as an example of a working mechanism unit other than traveling, there is a lifting mechanism for a dump truck vessel (loading platform). In the dump truck, the earth and sand placed on the vessel can be smoothly slid down from the vessel by moving the vehicle while raising the vessel. Therefore, in the case of a dump truck, it is required that the PTO mechanism can be operated even in a range other than the N range (D range, R range) and that the vehicle can be moved by connecting the clutch while maintaining the operating state of the PTO mechanism. ing. There is a similar need for PTO-equipped vehicles other than dump trucks.

  According to Patent Document 1, even when the PTO switch is not turned off, if the shift lever is operated while the PTO mechanism is connected to the transmission, the PTO mechanism is shut off. Therefore, when trying to carry out the slip-down of the sediment from the vessel at a normal vehicle speed, the PTO mechanism is interrupted and the working efficiency is lowered.

  The present invention has been made in view of the above-described problems. The object of the present invention is to temporarily stop the vehicle when the PTO switch is released by turning off the PTO switch while the vehicle is running. An object of the present invention is to provide a PTO-equipped vehicle that can be quickly returned to normal running and has improved usability.

  A PTO-equipped vehicle according to at least one embodiment of the present invention is disposed between a transmission device mounted on the vehicle, a power device that supplies power to the transmission device, and between the power device and the transmission device, A clutch for connecting and disconnecting power to the transmission, a PTO device for connecting and disconnecting to the transmission, and taking out the power from the transmission to the outside, and the PTO device to the transmission A PTO switch for connecting and disconnecting, a shift control device for controlling the gear stage of the transmission, a clutch control device for controlling connection and disconnection of the clutch, and the switching according to switching of the PTO switch A PTO control device for controlling connection and disconnection of the PTO device, wherein the PTO control device is configured such that when the transmission is in a traveling gear stage, When the switch is switched to the shut-off side, the clutch control device shuts off the clutch, and after the transmission control device neutralizes the transmission, the PTO device is disconnected from the transmission. The transmission control device is configured to change the transmission device to a target gear stage after the PTO device is disconnected from the transmission device.

  According to at least one embodiment of the present invention, when the PTO switch is turned OFF while the vehicle is running, the clutch control device disengages the clutch, and the shift control is performed regardless of the shift instruction of the shift instruction device. After the device sets the transmission to neutral, the PTO device is disconnected from the transmission. The speed change control device is configured to change the speed change device to the target gear stage after the PTO device is disconnected from the speed change device. As described above, after the PTO power is cut off, the vehicle can be quickly returned to the normal running without temporarily stopping the vehicle by performing a shift control to a gear stage corresponding to the vehicle speed of the vehicle. For this reason, the usability of the vehicle is good and the merchantability can be improved.

  In some embodiments, the PTO-equipped vehicle includes: a stop state determination device that determines whether or not the vehicle is in a stopped state; and a shift instruction device that issues a shift instruction to the shift control device; When the shift instruction device is in the R range after the transmission device is neutral, the device changes the transmission device to a reverse gear after the stop state determination device determines that the stop state has occurred. Composed.

According to this configuration, after the transmission device is neutral, when the shift instruction device is in the R range position, the transmission device is changed to the reverse gear after the stop state determination device determines that the stop state has occurred. Is done. That is, when the vehicle moves backward, the shift control is not performed until the vehicle is temporarily stopped.
For work other than traveling when the vehicle is moving backward, the rear view has a narrower field of view than the front confirmation (because the rear of the vehicle is hidden behind the cargo bed), making it difficult to confirm safety. For this reason, once the vehicle is stopped, it is easy to confirm the safety behind the vehicle.

  In some embodiments, the PTO-equipped vehicle includes a stop state determination device that determines whether or not the vehicle is in a stopped state, and the shift control device turns off the PTO switch when the vehicle is in a reverse drive state. When operated, the stop state determination device is configured not to cut off the power transmission of the PTO device until it is determined as a stop state.

  According to this configuration, by continuing the power load of the PTO device while the vehicle is moving backward, there is no change in the load required for driving the PTO device, so that it is possible to travel in reverse without any discomfort during driving.

  In some embodiments, in the PTO-equipped vehicle, the shift control device is configured such that at least one of a vehicle speed of the vehicle, a rotational speed of the power unit, and a road surface downhill gradient during traveling is equal to or greater than a predetermined value. Is configured not to shut off the power of the PTO device.

When at least one of the vehicle speed, the number of revolutions of the power unit, the road surface downhill slope during traveling, etc. is a predetermined value or more, that is, when the vehicle is traveling at high speed or down a steep slope In such a case, if the load required to drive the PTO device is suddenly lost, the load applied to the power unit is reduced, and the rotational speed increases rapidly, which may increase the traveling speed of the vehicle.
Therefore, according to this configuration, it is possible to prevent the driver from feeling uncomfortable with the behavior of driving feeling by preventing the load of the power plant from rapidly increasing, thereby contributing to safe driving.

  In some embodiments, the shift control device includes a recognition device that causes the driver to recognize that the power of the PTO device is cut off when the power of the PTO is cut off while the vehicle is running.

When the power of the PTO device is cut off, the load acting on the power device is drastically reduced, so that the behavior of the vehicle becomes faster and the driver may be worried.
Therefore, according to this configuration, the driver can be informed that the load on the PTO device has been released by the recognition device, thereby enabling safer driving.

  According to at least one embodiment of the present invention, when the PTO switch is released by turning off the PTO switch while the vehicle is running, the usability can be improved by quickly returning to normal running without temporarily stopping the vehicle. It is possible to provide a PTO-equipped vehicle.

The whole schematic block diagram which shows an example for implementing the PTO control apparatus of the transmission which concerns on some embodiment of this invention is shown. The cutoff control flow figure of the PTO control device of the transmission which concerns on one Embodiment of this invention is shown. The cutoff control flow figure of the PTO control device of the transmission which concerns on one Embodiment of this invention is shown.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative positions, etc. of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. Absent.

FIG. 1 shows an overall schematic diagram for implementing a PTO-equipped vehicle according to some embodiments of the present invention.
The PTO control system 100 includes an engine 1 that is a power unit, and a mechanical automatic transmission (hereinafter referred to as a transmission unit) that is located on the downstream side of the power system of the engine 1 and that converts a rotational driving force (power) of the engine 1. AMT 2), a clutch 3 that is interposed between the engine 1 and the AMT 2 and transmits (connects) and disconnects the rotational driving force of the engine 1 to the AMT 2, and the rotational speed Np (output) of the engine 1 ) And a PTO device (transmission PTO (hereinafter referred to as T / M PTO) that is attached to the side wall of the AMT 2 and transmits (connects) and shuts off the power from the engine 1 to an external mechanism other than the vehicle running. 23) and a PTO switch (PTO switch) which is arranged in the meter cluster M of the driver's seat and operates to connect and disconnect the T / M PTO 23 to the AMT 2 / W) 83, a PTO control device 51 that controls connection and disconnection of the T / M PTO 23 based on ON / OFF of the PTO switch 83, and an operation of a working mechanism unit other than vehicle traveling in the PTO control device 51, or An external operating lever 8 for operating the stop is provided.
In addition, as another power unit, instead of the engine 1 or in combination with the engine 1, a unit constituted by a large-capacity battery and an electric motor driven by electric power of the battery may be used.

The AMT 2 includes a mechanical transmission 21 having a structure similar to that of a manual transmission with high fuel efficiency, a shift instruction device 53 for instructing conversion of the gear range of the mechanical transmission 21, and an upper portion of the mechanical transmission 21. The gear shift unit (GSU) 22 for shifting the gear range of the mechanical transmission 21 and the transmission and disconnection control of the clutch 3 are synchronized with the mechanical shift 21 by the gear shift unit (GSU) 22 at the time of disconnection. The shift control device 5 that performs shift control of the gear range (shift stage), the gear shift indicator 54 that is a recognition device that displays the gear range after the shift of the shift range of the mechanical transmission 21, and the transmission or disconnection control of the clutch 3 are controlled. A clutch control device 52 for performing the clutch control operation for connecting (transmitting) or disconnecting the clutch 3 based on the control of the clutch control device 52 And eta 31, is mounted on the output shaft of the mechanical transmission 21, the vehicle is equipped with a vehicle speed sensor 25 is a stop state determination device which determines whether it is in a stopped state, the.
In the present embodiment, the PTO control device 51 is built in the shift control device 5.

Further, the speed change control device 5 detects the rotation speed Nprpm of the engine 1 and receives a signal from the rotation speed sensor 11 and a signal from the gradient sensor 12 that detects the state of the road surface of the vehicle via the engine control device 6. Entered.
Further, an accelerator device 9 for operating the engine output is provided for the driver to obtain a desired driving feeling.
The accelerator device 9 includes an accelerator pedal 91 that the driver steps on, and an accelerator sensor 92 that detects the amount of depression of the accelerator pedal 91 and outputs a signal to the engine control device 6.

The shift instruction device 53 selects and operates a D range for automatically shifting forward travel, an automatic travel pattern having a reverse travel R range and neutral N, and a manual operation pattern for manually operating forward travel or reverse travel. It can be done.
In the case of the automatic travel pattern, the shift control device 5 is obtained in advance so as to obtain the optimum fuel consumption and driving feeling based on the depression amount of the accelerator pedal 91, the vehicle speed, and the current gear range of the mechanical transmission 21. Along with the map, automatic control is performed so as to obtain the shift range of the mechanical transmission 21.

On the other hand, in the case of a manual operation pattern, the shift control device 5 is disposed at the lower portion of the operation lever by the driver repeatedly operating the operation lever (not shown) of the shift instruction device 53 so as to be in a desired shift range. A signal is transmitted from a signal transmitter (not shown) to the shift control device 5, and the shift control device 5 controls the gear shift unit 22 so that the shift range is in accordance with the shift instruction.
In manual operation, in the case of upshifting, the operation lever is repeatedly operated once to the + side to obtain a desired gear position. In the case of downshifting, it is repeatedly operated to the minus side once to reach the desired gear position.

The clutch control device 52 operates the clutch actuator 31 to automatically shut off the clutch 3 before starting the gear shift when the gear shift control device 5 shifts the gear range of the mechanical transmission 21. The gear shift unit (GSU) 22 performs a range shift in the mechanical transmission 21.
When the range shift is completed, the clutch actuator 31 automatically connects the clutch 3 so that power is transmitted from the engine 1 to the mechanical transmission 21.

  A meter cluster M is provided at the driver's seat of the vehicle so that the status of various devices in the traveling state of the vehicle can be confirmed. In the meter cluster M, a monitor indicating the gear range position of the mechanical transmission 21 is arranged. For example, “2” is displayed for the 2nd speed range, “3” is displayed for the 3rd speed range, “R” is displayed for the reverse, and “N” is displayed for the neutral.

The operation sequence of the T / M PTO 23 will be described with reference to FIG.
When the driver turns on the PTO switch 83, the speed change control device 5 operates the clutch actuator 31 via the clutch control device 52, disengages the clutch 3, and also via the gear shift unit 22, the mechanical transmission 21. Is switched to neutral (N range).
Next, a signal indicating completion of switching of the clutch 3 and switching the mechanical transmission 21 to neutral is input to the shift control device 5. The transmission control device 5 causes the T / M PTO 23 and the mechanical transmission 21 to be connected (gear engagement) via the PTO control device 51. Then, a signal indicating that the connection between the T / M PTO 23 and the mechanical transmission 21 is completed is input to the transmission control device 5 via the PTO control device 51.

The shift control device 5 again operates the clutch actuator 31 via the clutch control device 52 to connect the clutch 3. When the connection of the clutch 3 is completed, the signal is input to the shift control device 5 and a symbol indicating the T / M PTO connection is displayed on the gear shift indicator 54 of the meter cluster M via the PTO control device 51.
Thereafter, the operation of the external operation lever 8 for operating the work mechanism unit other than traveling is performed. The working mechanism unit other than traveling includes, for example, a hydraulic device that operates a power cylinder or the like for raising or lowering a vessel (loading platform) of a dump truck.
The external operation lever 8 in FIG. 1 includes, for example, a dump lever 82 that operates to raise or lower a vessel (loading platform) of a dump truck, and an external operation that transmits a signal along the operation amount of the dump lever 82 to the PTO control device 51. A sensor 81 is provided.
Based on the signal from the external operation sensor 81, the output (power) from the T / M PTO 23 can be adjusted by the PTO control device 51, the shift control device 5, and the engine control device 6.

Next, a T / MP PTO cutoff control method of the transmission control device 5 will be described based on the control flow chart of FIG.
Here, the case where the PTO switch 83 is turned off in the D range or the R range will be described. The description when the PTO switch 83 is turned off in the N range is omitted, but when the PTO switch 83 is turned off in the N range, for example, step 2, step 3, step 7, step 8, and step 16 are performed. Control will be performed.
Start in step S1.
In step S2, it is determined whether or not the T / M PTO 23 is operating (connected to the mechanical transmission 21).
If it is in the operating state, select YES and proceed to step S3. On the other hand, if the T / M PTO 23 is disconnected from the mechanical transmission 21, NO is selected, the process proceeds to step S16, the control is terminated, and the process returns.

In step S3, it is determined whether or not the PTO switch 83 is turned off.
When the PTO switch is in the ON state, it is determined that the operation of the T / M PTO 23 is continued, NO is selected, and the process proceeds to Step S16.
On the other hand, if the PTO switch 83 is turned off in step S3, YES is selected and the process proceeds to step S4.
In step S4, it is determined whether or not the vehicle speed S detected by the vehicle speed sensor 25, which is a stop state determination means, is less than the predetermined speed Sokm / h.
If vehicle speed S ≧ predetermined speed So, the process proceeds to step S16 and the operation of T / M PTO 23 is continued.

  This is because if the connection between the T / M PTO 23 and the mechanical transmission 21 is cut off in a state where the vehicle speed S is high, the load required to drive the T / M PTO 23 is suddenly lost, and the engine speed Np is temporarily reduced. The power of the engine 1 increases and the power of the engine 1 is increased, so that the vehicle travels faster, the driver feels uncomfortable and the driver feels uncomfortable. To prevent.

On the other hand, if vehicle speed S <predetermined speed Sokm / h, there is no discomfort as described above, so YES is selected and the process proceeds to step S5.
In step S5, it is determined whether or not the rotational speed Np of the engine (E / G) 1 is smaller than the predetermined rotational speed No rpm.
If the engine speed Np ≧ the predetermined engine speed No, NO is selected and the process proceeds to step S16 to continue the operation of the T / M PTO 23.
This is because when the engine speed Np ≧ No, the load caused by the operation of the T / M PTO 23 is large, and the connection between the T / M PTO 23 and the mechanical transmission 21 is suddenly cut off in this state (high rotation). As a result, the load required for driving the T / M PTO 23 is suddenly eliminated, the engine speed Np is rapidly increased, and the driving behavior of the vehicle is uncomfortable and the waste of fuel consumption is prevented. To do.

In step S5, if the engine speed Np <No, the above case does not occur, so YES is selected and the process proceeds to step S6.
In step S6, it is determined whether or not the gradient (downhill gradient) of the traveling road surface is such that the gradient θ detected by the gradient sensor 12 is smaller than the predetermined gradient θo.
In this case, when the road surface gradient θ is equal to or greater than the predetermined gradient θo, NO is selected and the process proceeds to step S16, and the operation of the T / M PTO 23 is continued.

  This is because if the road surface has a downward gradient θ ≧ predetermined gradient θo, the vehicle may accelerate along the downward gradient due to the vehicle's own weight, and the engine absorption torque (engine) Brake) and the load caused by the operation of the T / M PTO 23 have the effect of suppressing the vehicle speed on a downward slope. In this state, if the connection between the T / M PTO 23 and the mechanical transmission 21 is cut off and the power is not transmitted (clutch disengagement, gear neutral state), the engine absorption torque and the load required to drive the T / M PTO 23 Is suddenly eliminated, and the vehicle descending speed may be increased, thereby preventing the vehicle from running uncomfortable.

In step S6, if the road surface gradient θ during traveling is less than the predetermined gradient θo, since the above-described vehicle traveling behavior does not feel uncomfortable, YES is selected and the process proceeds to step S7.
In step S7, the clutch 3 is disengaged and the gear stage of the mechanical transmission 21 is shifted to neutral (N range).
In step S8, the engagement of the PTO gear is released. In this state, the PTO loses power transmission with the mechanical transmission 21.

In step S9, it is determined whether or not the shift instruction device 53 is in the R (reverse) range.
This is to determine whether the shift control device 5 controls the mechanical transmission 21 to move forward or backward in the next stage.
In step S9, if the shift instruction device 53 is operated to other than the R range, that is, forward (D range), NO is selected and the process proceeds to step S10. In step S10, the mechanical transmission 21 is shifted to the shift instruction device. The gear shift is started to the target gear stage indicated by 53.

In step 9, it is determined whether the shift instruction device 53 is in the R range or the D range. However, the present invention is not limited to this. For example, a sensor that detects the gear position of the mechanical transmission 21 (transmission device) (not shown). It is determined whether the gear stage before being neutral in step 7 is a gear stage corresponding to the R range or a gear stage corresponding to the D range, and the control of step 10 or step 12 is performed according to the determination result. May be.
Further, when determining whether or not the mechanical transmission 21 (transmission device) is in the traveling gear stage, for example, it may be determined based on whether or not the range position of the shift instruction device 53 is the D range position. It may be determined whether the gear position of the transmission is a gear position corresponding to the D range of the shift instruction device.
In step S11, the fact that the gear shift control to the target gear stage of the mechanical transmission 21 has been started is displayed blinking on the gear shift indicator 54 provided in the meter cluster M.

In the present embodiment, the target gear stage is an automatic travel pattern in which the operation position of the shift instruction device 53 has a D range for automatically shifting forward travel, an R range for reverse travel, and a neutral N, and forward travel or reverse travel. This differs depending on the manual operation pattern in which manual operation is performed.
In the case of the automatic travel pattern, the target is set according to a map determined in advance so that the optimum fuel consumption and driving feeling can be obtained based on the depression amount of the accelerator pedal 91, the vehicle speed, and the current gear range of the mechanical transmission 21. Gear stage is required.
On the other hand, in the case of the manual operation pattern, the target gear is set by the driver repeatedly operating the operation lever (not shown) of the shift instruction device 53 so as to be in the desired shift range.

For example, “3” for the third speed and “4” for the fourth speed blink.
This is because the power required to drive the T / M PTO 23 of the engine 1 is lost in the state where the T / M PTO 23 is shut off, the vehicle behavior becomes faster, and the driver feels uncomfortable with the T / M Recognizes that the PTO 23 is in a blocked state.

In step S14, it is determined whether or not the gear shift to the target gear stage has been completed. If it is determined that the operation has been completed, YES is selected, the process proceeds to step S15, the blinking of the target gear stage of the gear shift indicator 54 changes to a continuous display, and the vehicle travels forward at the target gear stage.
On the other hand, if the gear shift to the target gear stage is not completed in step S14, the process returns to step S11, and steps S11 and S14 are repeated to wait until the shift to the target gear stage is completed.
The process returns at step S16.

On the other hand, if the shift instruction device 53 is in the R range in step S9, YES is selected and the process proceeds to step S12.
In step S12, it is determined whether or not the vehicle is stopped.
The AMT 2 is controlled so that it cannot shift to the R range unless the vehicle is stopped.
This is because it is difficult to confirm the safety of the work other than traveling when the vehicle moves backward because the rear confirmation has a narrower field of view than the front confirmation (because the rear of the vehicle is hidden behind the cargo bed). For this reason, once the vehicle is stopped, it is easy to confirm the safety behind the vehicle.
Furthermore, when an operation that suddenly reverses the vehicle is performed while the vehicle is moving forward, it is possible to prevent a shock that occurs in the vehicle and damage to the drive line from occurring.
If the vehicle is not stopped, NO is selected and the process returns to step S9.
Steps S9 and S12 are repeated until the vehicle stops.

In step S12, if it is confirmed by the vehicle speed sensor 25 that is a stop state determination device that the vehicle is stopped, YES is selected and the process proceeds to step S13.
In step S13, shifting to the R range where the shift instruction device 53 indicates the mechanical transmission 21 is started.
In step S11, “R” indicating the reverse range is flashed on the gear shift indicator 54 provided in the meter cluster M to indicate that the gear shift control to the R range of the mechanical transmission 21 is started.
Steps S14, 15, and 16 have already been described and will be omitted.

As described above, according to the PTO-equipped vehicle in at least one embodiment of the present invention described above, when the PTO switch 83 is turned off while the vehicle is running, the clutch control device 52 disengages the clutch 3 and the shift instruction device. Regardless of the shift instruction of 53, the shift control device 5 shuts off the PTO device 23 from the mechanical transmission 21 after the mechanical transmission 21 is neutral. The shift control device 5 is configured to change the mechanical transmission 21 to the target gear stage after the PTO device 23 is disconnected from the mechanical transmission 21. As described above, after the power of the PTO device 23 is cut off, the vehicle can be quickly returned to normal running without temporarily stopping the vehicle by performing a shift control to a gear stage corresponding to the vehicle speed of the vehicle. For this reason, the usability of the vehicle is good and the merchantability can be improved.
Further, when the shift instruction device 53 is operated in the R (reverse) range, the vehicle is temporarily stopped and then the mechanical transmission 21 is shifted to the R range, so that safety during reverse is ensured. In addition, the vehicle drive line can be protected.

(Second Embodiment)
Next, based on FIG. 3, the control flow about some embodiment is demonstrated.
Start in step S20.
In step S21, it is determined whether or not the T / M PTO 23 is operating (connected to the mechanical transmission 21).
If it is in the operating state, select YES and proceed to step S22.
On the other hand, if the T / M PTO 23 is disconnected from the mechanical transmission 21 in step S21, NO is selected, the process proceeds to step S31, the control is terminated, and the process returns.

In step S22, it is determined whether or not the PTO switch (S / W) 83 is turned off.
When the PTO switch is in the ON state, it is determined that the operation of the T / M PTO 23 is continued, NO is selected, and the process proceeds to step S31.
If the PTO switch 83 is OFF in step S22, YES is selected and the process proceeds to step S23.
In step S23, if the shift instruction device 53 is operated in a range other than the R range, that is, in the D (forward) range, NO is selected and the process proceeds to step S31, and this control ends and returns.
In step S23, when the shift instruction device 53 is operated to the R range, YES is selected and the process proceeds to step S24.

In step S24, it is determined whether the vehicle is moving backward (stopped).
If the vehicle is moving backward, NO is selected and the process proceeds to step S31, where the present control ends and returns.
On the other hand, if the vehicle is stopped, YES is selected and the process proceeds to step S25.
This is controlled so that the AMT 2 cannot shift to the R (reverse) range unless the vehicle is stopped.

In step S25, the clutch 3 is disengaged and the gear stage of the mechanical transmission 21 is shifted to neutral (N range).
In step S26, the PTO 23 is shut off.
In this state, the PTO loses power transmission with the mechanical transmission 21.
In this embodiment, the PTO 23 is shut off after the vehicle has stopped moving backward.
When the PTO 23 is shut off during reverse, the load associated with the operation of the PTO 23 is eliminated by the PTO 23 being cut off, and the load required for driving the PTO 23 of the engine 1 is added to the vehicle for driving, so that the behavior of the vehicle becomes faster. This makes it possible to prevent the driver from feeling uneasy about driving.

In step S27, the gear is shifted to the target gear stage.
Here, in the case of the automatic travel pattern, the target gear stage is the optimum fuel consumption and driving feeling based on the depression amount of the accelerator pedal 91, the vehicle speed, and the current gear range of the mechanical transmission 21, as in the above-described embodiment. Is obtained along a map obtained in advance.
On the other hand, in the case of the manual operation pattern, the target gear is set by the driver repeatedly operating the operation lever (not shown) of the shift instruction device 53 so as to be in the desired shift range.

Therefore, the gear shift of the mechanical transmission 21 to the target gear stage is started based on the operation pattern of the shift instruction device 53.
In step S28, the target gear stage blinks on the gear shift indicator 54, which is a recognition device arranged in the meter cluster M, that the gear shift to the target gear stage of the mechanical transmission 21 is started.
This is because the power required to drive the T / M PTO 23 of the engine 1 is lost in the state where the T / M PTO 23 is shut off, the vehicle behavior becomes faster, and the driver feels uncomfortable with the T / M Recognizes that the PTO 23 is in a blocked state.

In step S29, it is determined whether or not the gear shift to the target gear stage has been completed. If it is determined that the operation is completed, YES is selected, the process proceeds to step S30, the blinking of the target gear stage of the gear shift indicator 54 changes to continuous display, and the vehicle travels at the target gear stage.
The process returns at step S31.
On the other hand, if the gear shift to the target gear stage is not completed in step S29, the process returns to step S28, and steps S28 and 29 are repeated to wait until the gear shift completes the shift to the target gear stage.

By doing in this way, at the time of reversing, the back of a vehicle becomes a shadow of a loading platform (mounting object), and back check property is inferior compared with the front.
Therefore, by implementing the timing at which the PTO 23 is shut off when the vehicle is in the reverse state after the vehicle stops, safe driving can be ensured so that the behavior of the vehicle does not differ from the driver's feeling.

  In vehicles equipped with a transmission such as a mechanical automatic transmission (AMT) equipped with a transmission PTO, after releasing the PTO mechanism, the vehicle can be quickly returned to normal running to improve the usability of the vehicle equipped with the PTO mechanism. Applicable to PTO-equipped vehicles.

1 Engine (Power unit)
2 Mechanical automatic transmission (AMT)
3 Clutch 5 Transmission control device 6 Engine control device 8 External mechanism operation instruction device (external operation lever)
9 Accelerator device 11 Rotational speed sensor 12 Gradient sensor 21 Mechanical transmission (transmission)
22 Gear shift unit (GSU)
23 Transmission PTO (T / M PTO)
25 Vehicle speed sensor (stop state judgment means)
31 Clutch actuator 51 PTO control device 52 Clutch control device 53 Shift instruction device 54 Gear shift indicator (recognition device)
83 PTO switch (PTO S / W)
100 PTO control system

Claims (5)

A transmission mounted on the vehicle;
A power unit for powering the transmission,
A clutch disposed between the power unit and the transmission, for connecting and disconnecting power to the transmission;
A PTO device connected to and disconnected from the transmission, and for taking out the power from the transmission to the outside;
A PTO switch for connecting and disconnecting the PTO device to and from the transmission;
A shift control device for controlling the gear position of the transmission,
A clutch control device for controlling connection and disconnection of the clutch;
A PTO control device for controlling connection and disconnection of the PTO device according to switching of the PTO switch,
In the PTO control device, when the transmission is in a traveling gear stage and the PTO switch is switched to the cutoff side, the clutch control device disconnects the clutch, and the transmission control device is the transmission device. And the transmission control device is configured to change the transmission device to a target gear stage after the PTO device is disconnected from the transmission device. A vehicle equipped with a PTO. A stop state determination device for determining whether or not the vehicle is in a stopped state, and a shift instruction device for giving a shift instruction to the shift control device;
The shift control device changes the transmission to the reverse stage after the neutralization of the transmission, and when the shift instruction device is in the R range position, the stoppage determination device determines that the vehicle is stopped. The PTO-equipped vehicle according to claim 1, wherein the vehicle is configured to do so. A stop state determination device that determines whether or not the vehicle is in a stop state,
When the PTO switch is turned off when the vehicle is in the reverse drive state, the shift control device does not cut off the power transmission of the PTO device until the stop state determination device determines that the vehicle is in a stop state. The PTO-equipped vehicle according to claim 1.   The speed change control device does not shut off the power of the PTO device when at least one of the vehicle speed of the vehicle, the number of revolutions of the power unit, and the road surface downhill slope during traveling is a predetermined value or more. The PTO-equipped vehicle according to any one of claims 1 to 3, wherein the vehicle is a PTO-equipped vehicle.   4. The shift control device according to claim 1, further comprising a recognition device for recognizing that the power of the PTO device is cut off when the power of the PTO is cut off while the vehicle is running. The PTO-equipped vehicle according to any one of the above.

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