WO2014097828A1 - Control device and control method for range-type transmission - Google Patents

Control device and control method for range-type transmission Download PDF

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Publication number
WO2014097828A1
WO2014097828A1 PCT/JP2013/081647 JP2013081647W WO2014097828A1 WO 2014097828 A1 WO2014097828 A1 WO 2014097828A1 JP 2013081647 W JP2013081647 W JP 2013081647W WO 2014097828 A1 WO2014097828 A1 WO 2014097828A1
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control
transmission
fluid
valve
speed
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PCT/JP2013/081647
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French (fr)
Japanese (ja)
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孝之 本橋
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ボルボ ラストバグナー アクチエボラグ
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Publication of WO2014097828A1 publication Critical patent/WO2014097828A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/3023—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/02—Selector apparatus
    • F16H59/0217—Selector apparatus with electric switches or sensors not for gear or range selection, e.g. for controlling auxiliary devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/70—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for change-speed gearing in group arrangement, i.e. with separate change-speed gear trains arranged in series, e.g. range or overdrive-type gearing arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
    • F16H63/44—Signals to the control unit of auxiliary gearing

Definitions

  • the present invention relates to a control device and a control method for a range type transmission.
  • a sub-transmission (range) connected in series with the main transmission is provided by a switching lever (switch) attached to the shift lever.
  • a range type transmission that switches between high speed and low speed with a working fluid may be mounted.
  • the reduction ratio may increase and the engine may be overrevised. There is.
  • Patent Document 1 a technique for suppressing an undesired downshift to a shift stage in accordance with an electric signal indicating the operation state of the switching lever has been proposed. ing.
  • the switching lever attached to the shift lever only switches the supply path of the working fluid to the sub-transmission. It is not always necessary to have a sensor for detecting the above. When the sensor for detecting the operation state of the switching lever is not attached, the operation state of the switching lever cannot be grasped, and therefore, the downshift to an undesirable shift stage cannot be suppressed by the electric signal.
  • the present invention provides a control device and a control method for a range-type transmission that can suppress downshifting to an undesired shift stage even if the operation state of the switching lever that operates the sub-transmission cannot be grasped.
  • the range type transmission is connected to a main transmission that is manually shifted by a shift lever and a sub-transmission that is shifted at a low speed or a high speed by a working fluid supplied to an operating chamber of an actuator.
  • the control device for the range type transmission switches the sub-transmission to a low speed when the control fluid is supplied to the control port, supplies the working fluid to the low-speed working chamber of the actuator, and controls the control port.
  • a flow path switching valve that switches the sub-transmission at a high speed when fluid is not supplied, supplies a working fluid to the high-speed working chamber of the actuator, and a control fluid supply path to the control port of the flow path switching valve And a switching lever that controls the supply of the control fluid to the control port, and a remotely operable on-off valve that opens and closes the control fluid supply passage.
  • the control device for the range type transmission controls the open / close valve so as to close the supply passage of the control fluid when the rotational speed of the output shaft of the sub-transmission is larger than a predetermined value.
  • a range-type transmission includes a sub-transmission that is shifted at a low speed or a high speed by a working fluid supplied to a working chamber of an actuator with respect to a main transmission that is manually shifted by a shift lever. It is connected.
  • the control device for the range-type transmission switches the sub-transmission to a low speed when the control fluid is not supplied to the control port, supplies the working fluid to the low-speed working chamber of the actuator, and controls the control port.
  • the control device for the range type transmission controls the open / close valve to open the control fluid supply passage when the rotational speed of the output shaft of the sub-transmission is larger than a predetermined value.
  • the control unit that electronically controls the range type transmission is configured such that when the rotational speed of the output shaft of the auxiliary transmission is greater than a predetermined value, The on-off valve is controlled to open and close the control fluid supply passage according to the characteristics.
  • the operating state of the actuator does not change, so that the operation state of the switching lever for operating the sub-transmission cannot be grasped. Therefore, it is possible to suppress a downshift to an undesirable gear.
  • FIG. 1 shows an outline of a range type transmission and its control device.
  • a range type transmission 300 is connected to the output shaft of the engine 100 via a friction clutch 200.
  • the clutch 200 is a mechanical element that transmits or cuts off the rotational driving force of the engine 100 by connecting and disconnecting a disk-like friction engagement element by, for example, a clutch pedal or an air actuator (not shown).
  • Range transmission 300 includes a main transmission 320 that is manually shifted by shift lever 400 and a sub-transmission 340 such as a range that is coupled to the output shaft of main transmission 320.
  • the shift lever 400 is connected to the transmission 322 of the main transmission 320 via the mechanical link mechanism 500.
  • the sub-transmission 340 operates the air cylinder (actuator) of the transmission 342 of the sub-transmission 340 with high-pressure air supplied from the air reservoir 600 to switch each gear stage of the main transmission 320 to low speed or high speed.
  • the shift lever 400 has a first flow path 700 that supplies high-pressure air supplied from the air reservoir 600 to the low-speed working chamber of the air cylinder that shifts the sub-transmission 340 at a low speed, or sub-shift.
  • a switching lever 420 that selectively switches to the second flow path 720 that supplies the high-speed working chamber of the air cylinder that shifts the machine 340 at high speed is attached.
  • the switching lever 420 By attaching the switching lever 420 to the shift lever 400, for example, the vehicle driver can operate the switching lever 420 without releasing the hand from the shift lever 400.
  • the range-type transmission 300 is switched to the first to sixth speeds on the low speed side as shown in FIG. 3 when the switching lever 420 is operated to the operation position LO.
  • the range type transmission 300 is switched from the 7th speed on the high speed side to the 12th speed as shown in FIG. Note that “R1” and “R2” in FIG. 3 indicate that the reverse gear is switched to low speed or high speed.
  • a control circuit as shown in FIG. 4 is incorporated in the shift lever 400 and the auxiliary transmission 340. That is, the high-pressure air supplied from the air reservoir 600 is supplied to the input port 404A of the flow path switching valve 404 via the first pipe 402, and via the second pipe 406 (control fluid supply passage). It is supplied to the control port 404B of the flow path switching valve 404.
  • an open / close valve (not shown) operated by a switching lever 420 and a normally open electromagnetic open / close valve 408 are arranged in this order along the flow direction of high-pressure air.
  • the flow path switching valve 404 outputs the high pressure air supplied to the input port 404A from the first output port 404C to the first flow path 700 when the control fluid (high pressure air) is supplied to the control port 404B. .
  • the flow path switching valve 404 sends the high-pressure air supplied to the input port 404A from the second output port 404D to the second flow path.
  • tip of the 1st flow path 700 is connected to the low speed side working chamber 344A of the air cylinder 344 which switches the subtransmission 340 to low speed.
  • the tip of the second flow path 720 is connected in communication with a high-speed working chamber 344B of the air cylinder 344 that switches the auxiliary transmission 340 to a high speed.
  • the air is supplied to the high-speed working chamber 344B of the air cylinder 344 via the path 720.
  • the subtransmission 340 is switched to low speed, and when high pressure air is supplied to the high speed side working chamber 344B of the air cylinder 344, The machine 340 is switched at high speed.
  • a transmission device 322 of the main transmission 320 detects, for example, an ON signal when the main transmission 320 is being shifted to neutral in order to detect the shift state of the main transmission 320. Is attached.
  • a range low switch 820 that outputs an ON signal when the sub-transmission 340 is shifted to a low speed is attached to the transmission 342 of the sub-transmission 340.
  • a clutch switch 840 that outputs an ON signal when the clutch 200 is disconnected is attached to the clutch 200 in order to detect the connection / disconnection state of the clutch 200.
  • a rotation speed sensor 860 for detecting the rotation speed of the output shaft is attached to the auxiliary transmission 340.
  • the output signals of the neutral switch 800, the range low switch 820, the clutch switch 840, and the rotation speed sensor 860 are input to a control unit 900 incorporating a computer.
  • the control unit 900 executes a control program stored in a non-volatile memory such as a flash ROM (Read Only Memory), so that the neutral switch 800, the range low switch 820, the clutch switch 840, and the rotation speed sensor 860
  • a non-volatile memory such as a flash ROM (Read Only Memory)
  • the electromagnetic on-off valve 408 is electronically controlled to suppress switching of the auxiliary transmission 340 from high speed to low speed.
  • FIG. 5 shows an example of a control program that the control unit 900 repeatedly executes every predetermined time when the engine 100 is operated.
  • step 1 the control unit 900 reads the rotational speed of the output shaft of the sub-transmission 340 from the rotational speed sensor 860 and determines whether or not it is greater than a predetermined value.
  • the predetermined value is a threshold value for determining whether or not the engine 100 is overrevised when the auxiliary transmission 340 is switched to a low speed.
  • the allowable upper limit rotational speed of the engine 100, the range type transmission 300 It can be appropriately determined in consideration of the reduction ratio. If the control unit 900 determines that the rotational speed is greater than the predetermined value, the control unit 900 advances the process to step 2 (Yes), and if it determines that the rotational speed is equal to or lower than the predetermined value, ends the process (No).
  • step 2 the control unit 900 reads the output signal of the range low switch 820, and determines whether or not the sub-transmission 340 is shifted at high speed through whether or not it is OFF. Then, if the control unit 900 determines that the sub-transmission 340 is shifted at a high speed, the control unit 900 proceeds to step 3 (Yes), whereas if it determines that the sub-transmission 340 is not shifted at a high speed, the control unit 900 performs the process. Is terminated (No).
  • step 3 the control unit 900 reads the output signal of the neutral switch 800, and determines whether or not the main transmission 320 is shifted to neutral through whether or not this is ON. If the control unit 900 determines that the main transmission 320 is shifted to the neutral position, the control unit 900 proceeds to step 5 (Yes), while determining that the main transmission 320 is not shifted to the neutral position. To step 4 (No).
  • step 4 the control unit 900 reads the output signal of the clutch switch 840, and determines whether or not the clutch 200 is disengaged through whether or not it is ON. If the control unit 900 determines that the clutch 200 is disengaged, the process proceeds to step 5 (Yes), while if it determines that the clutch 200 is not disengaged, the control unit 900 ends the process (No).
  • step 5 the control unit 900 operates the electromagnetic on-off valve 408. Accordingly, since the supply of the control fluid to the control port 404B of the flow path switching valve 404 is shut off, even if the switching lever 420 provided along with the shift lever 400 is operated to the operating position LO, the auxiliary transmission 340 is kept at a low speed. The high-pressure air is not supplied to the low-speed working chamber 344A of the air cylinder 344 that changes speed, and the switching of the auxiliary transmission 340 from high speed to low speed can be suppressed.
  • the rotation speed of the output shaft of the sub-transmission 340 is larger than a predetermined value, the sub-transmission 340 is shifted at a high speed, and the main transmission 320 is shifted to the neutral or clutch.
  • the electromagnetic on-off valve 408 operates as shown in FIG. For this reason, even if the switching lever 420 of the shift lever 400 is operated to the operating position LO, the control fluid is not supplied to the control port 404B of the flow path switching valve 404, and the auxiliary transmission 340 is changed from a high speed to a low speed. Switching can be suppressed. Therefore, even if the operating state of the switching lever 420 that operates the sub-transmission 340 cannot be grasped, it is possible to suppress a downshift to an undesirable shift stage.
  • the electromagnetic on-off valve 408 is operated to suppress the sub-transmission 340 from switching to a low speed. You may make it do. In addition to this condition, it is determined whether or not the sub-transmission 340 is shifted at high speed, whether or not the main transmission 320 is shifted to neutral, and whether or not the clutch 200 is disengaged. The operating frequency of the electromagnetic on-off valve 408 is reduced, and for example, the electric power for operating it can be suppressed. Further, instead of the rotational speed of the output shaft of the sub-transmission 340, for example, the vehicle speed related thereto can be used.
  • the auxiliary transmission 340 By determining whether or not the clutch 200 is disengaged, it is possible to highly accurately prevent the auxiliary transmission 340 from being switched to a low speed even when the operation speed of the electromagnetic on-off valve 408 is low. That is, when the operating speed of the electromagnetic opening / closing valve 408 is slow, the flow path switching valve is operated when the switching lever 420 is operated to the operating position LO immediately after the rotational speed of the output shaft of the sub-transmission 340 becomes greater than a predetermined value. A certain amount of time is required until the supply of the control fluid to the control port 404B of 404 is cut off. For this reason, the auxiliary transmission 340 may be switched to a low speed.
  • the sub-transmission 340 can be switched to a low speed regardless of the operating speed of the electromagnetic on-off valve 408 by taking into account the operation characteristic that the clutch pedal is depressed prior to the shift of the range type transmission 300. Can be suppressed with high accuracy.
  • the electromagnetic on-off valve 408 is operated similarly to the previous embodiment, and the flow path regardless of the operating state of the switching lever 420 of the shift lever 400.
  • the control fluid may be supplied to the control port 404B of the switching valve 404.
  • the working fluid for switching the sub-transmission 340 to low speed or high speed is not limited to high-pressure air, and may be hydraulic pressure adjusted to a predetermined pressure by a hydraulic pump or the like.
  • Range type transmission 320 Main transmission 340 Sub transmission 344 Air cylinder 344A Low speed side working chamber 344B High speed side working chamber 400 Shift lever 404 Flow path switching valve 404B Control port 406 Second piping 408 Electromagnetic switching valve 410 Third Piping 420 Switching lever 600 Air reservoir 800 Neutral switch 820 Range low switch 840 Clutch switch 860 Rotational speed sensor 900 Control unit

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Transmission Device (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

A range-type transmission comprising: a flow path switching valve that switches the flow path supplying hydraulic fluid to a hydraulic chamber in an actuator, which changes the speed of a sub transmission, in accordance with the state of supply of control fluid to a control port; a switching lever that controls the supply of the control fluid to the control port for the flow path switching valve; an open/close valve that opens/closes the supply path for the control fluid to the control port; and a control unit. The control unit controls the open/close valve so as to open/close the supply path for the control fluid in accordance with the properties of the flow path switching valve, when the rotation speed of an output shaft for the sub transmission is greater than a prescribed value.

Description

レンジ式変速機の制御装置及び制御方法Range type transmission control device and control method
　本発明は、レンジ式変速機の制御装置及び制御方法に関する。 The present invention relates to a control device and a control method for a range type transmission.
　大型車両においては、Ｈ型のシフトパターンを有する手動式の主変速機に加え、シフトレバーに付設された切替レバー（スイッチ）によって、主変速機と直列に連結された副変速機（レンジ）を作動流体で高速又は低速に切り替えるレンジ式変速機が搭載される場合がある。レンジ式変速機では、シフトレバーを適切に操作せずに、そこに付設された切替レバーによって副変速機を高速から低速に切り替えると、例えば、減速比が大きくなってエンジンがオーバレブしてしまうおそれがある。このため、特開２００１－２９５９１９号公報（特許文献１）に記載されるように、切替レバーの操作状態を示す電気信号に応じて、好ましくない変速段へのダウンシフトを抑制する技術が提案されている。 In a large vehicle, in addition to a manual main transmission having an H-shaped shift pattern, a sub-transmission (range) connected in series with the main transmission is provided by a switching lever (switch) attached to the shift lever. A range type transmission that switches between high speed and low speed with a working fluid may be mounted. In a range type transmission, if the sub-transmission is switched from a high speed to a low speed by a switching lever attached thereto without operating the shift lever appropriately, for example, the reduction ratio may increase and the engine may be overrevised. There is. For this reason, as described in Japanese Patent Application Laid-Open No. 2001-295919 (Patent Document 1), a technique for suppressing an undesired downshift to a shift stage in accordance with an electric signal indicating the operation state of the switching lever has been proposed. ing.
特開２００１－２９５９１９号公報JP 2001-295919 A
　しかしながら、副変速機を作動流体で切り替えるレンジ式変速機では、シフトレバーに付設された切替レバーは副変速機への作動流体の供給経路を切り替えるだけであるので、切替レバーの操作状態を電気的に検出するセンサが必ずしも必要ではない。切替レバーの操作状態を検出するセンサが取り付けられていない場合には、切替レバーの操作状態を把握できないことから、その電気信号によって好ましくない変速段へのダウンシフトを抑制することができない。 However, in the range type transmission that switches the sub-transmission with the working fluid, the switching lever attached to the shift lever only switches the supply path of the working fluid to the sub-transmission. It is not always necessary to have a sensor for detecting the above. When the sensor for detecting the operation state of the switching lever is not attached, the operation state of the switching lever cannot be grasped, and therefore, the downshift to an undesirable shift stage cannot be suppressed by the electric signal.
　そこで、本発明は、副変速機を操作する切替レバーの操作状態を把握できなくとも、好ましくない変速段へのダウンシフトを抑制できる、レンジ式変速機の制御装置及び制御方法を提供することを目的とする。 Accordingly, the present invention provides a control device and a control method for a range-type transmission that can suppress downshifting to an undesired shift stage even if the operation state of the switching lever that operates the sub-transmission cannot be grasped. Objective.
　提案技術の一形態に係るレンジ式変速機は、シフトレバーにより手動変速される主変速機に対して、アクチュエータの作動室に供給される作動流体により低速又は高速に変速される副変速機が連結されている。また、レンジ式変速機の制御装置は、制御ポートに制御流体が供給されているときに、副変速機を低速に切り替える、アクチュエータの低速側作動室に作動流体を供給する一方、制御ポートに制御流体が供給されていないときに、副変速機を高速に切り替える、アクチュエータの高速側作動室に作動流体を供給する流路切替弁と、流路切替弁の制御ポートへの制御流体の供給通路に配設され、制御ポートへの制御流体の供給を制御する切替レバーと、制御流体の供給通路を開閉する遠隔操作可能な開閉弁と、を有する。そして、レンジ式変速機の制御装置は、副変速機の出力軸の回転速度が所定値より大きいときに、制御流体の供給通路を閉じるように開閉弁を制御する。 The range type transmission according to one form of the proposed technology is connected to a main transmission that is manually shifted by a shift lever and a sub-transmission that is shifted at a low speed or a high speed by a working fluid supplied to an operating chamber of an actuator. Has been. In addition, the control device for the range type transmission switches the sub-transmission to a low speed when the control fluid is supplied to the control port, supplies the working fluid to the low-speed working chamber of the actuator, and controls the control port. A flow path switching valve that switches the sub-transmission at a high speed when fluid is not supplied, supplies a working fluid to the high-speed working chamber of the actuator, and a control fluid supply path to the control port of the flow path switching valve And a switching lever that controls the supply of the control fluid to the control port, and a remotely operable on-off valve that opens and closes the control fluid supply passage. The control device for the range type transmission controls the open / close valve so as to close the supply passage of the control fluid when the rotational speed of the output shaft of the sub-transmission is larger than a predetermined value.
　提案技術の他の形態に係るレンジ式変速機は、シフトレバーにより手動変速される主変速機に対して、アクチュエータの作動室に供給される作動流体により低速又は高速に変速される副変速機が連結されている。また、レンジ式変速機の制御装置は、制御ポートに制御流体が供給されていないときに、副変速機を低速に切り替える、アクチュエータの低速側作動室に作動流体を供給する一方、制御ポートに制御流体が供給されているときに、副変速機を高速に切り替える、アクチュエータの高速側作動室に作動流体を供給する流路切替弁と、流路切替弁の制御ポートへの制御流体の供給を制御する切替レバーと、切替レバーをバイパスして流路切替弁の制御ポートに制御流体を供給する制御流体の供給通路を開閉する遠隔操作可能な開閉弁と、を有する。そして、レンジ式変速機の制御装置は、副変速機の出力軸の回転速度が所定値より大きいときに、制御流体の供給通路を開くように開閉弁を制御する。 A range-type transmission according to another aspect of the proposed technology includes a sub-transmission that is shifted at a low speed or a high speed by a working fluid supplied to a working chamber of an actuator with respect to a main transmission that is manually shifted by a shift lever. It is connected. In addition, the control device for the range-type transmission switches the sub-transmission to a low speed when the control fluid is not supplied to the control port, supplies the working fluid to the low-speed working chamber of the actuator, and controls the control port. Controls the supply of control fluid to the control port of the flow path switching valve that supplies the working fluid to the high speed side working chamber of the actuator that switches the sub-transmission at a high speed when fluid is supplied A switching lever that can be operated, and an on-off valve that can be remotely operated to open and close a control fluid supply passage that supplies the control fluid to the control port of the flow path switching valve by bypassing the switching lever. Then, the control device for the range type transmission controls the open / close valve to open the control fluid supply passage when the rotational speed of the output shaft of the sub-transmission is larger than a predetermined value.
　提案技術の一形態に係るレンジ式変速機の制御方法では、レンジ式変速機を電子制御するコントロールユニットが、副変速機の出力軸の回転速度が所定値より大きいときに、流路切替弁の特性に応じて、制御流体の供給通路を開閉するように開閉弁を制御する。 In the range type transmission control method according to one form of the proposed technology, the control unit that electronically controls the range type transmission is configured such that when the rotational speed of the output shaft of the auxiliary transmission is greater than a predetermined value, The on-off valve is controlled to open and close the control fluid supply passage according to the characteristics.
　本発明によれば、切替レバーを操作して副変速機を低速に切り替えようとしても、アクチュエータの作動状態が変化しないことから、副変速機を操作する切替レバーの操作状態が把握できなくても、好ましくない変速段へのダウンシフトを抑制することができる。 According to the present invention, even if an operation of the switching lever is operated to switch the sub-transmission to a low speed, the operating state of the actuator does not change, so that the operation state of the switching lever for operating the sub-transmission cannot be grasped. Therefore, it is possible to suppress a downshift to an undesirable gear.
レンジ式変速機及びその制御装置の概要図である。It is a schematic diagram of a range type transmission and its control apparatus. レンジ切替レバー付きシフトレバーの説明図である。It is explanatory drawing of the shift lever with a range switch lever. レンジ切替レバー付きシフトレバーのＨ型シフトパターンの説明図である。It is explanatory drawing of the H-type shift pattern of a shift lever with a range switch lever. レンジ式変速機の制御装置の一例を示す詳細説明図である。It is detailed explanatory drawing which shows an example of the control apparatus of a range type transmission. レンジ式変速機の制御プログラムの一例を示すフローチャートである。It is a flowchart which shows an example of the control program of a range type transmission. 副変速機の低速への変速を抑制する方法の説明図である。It is explanatory drawing of the method of suppressing the shift to the low speed of a subtransmission. レンジ式変速機の制御装置の他の例を示す詳細説明図である。It is detailed explanatory drawing which shows the other example of the control apparatus of a range type transmission.
　以下、添付された図面を参照し、本発明を実施するための実施形態について詳述する。
　図１は、レンジ式変速機及びその制御装置の概要を示す。 Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an outline of a range type transmission and its control device.
　エンジン１００の出力軸には、摩擦式のクラッチ２００を介して、レンジ式変速機３００が連結されている。 A range type transmission 300 is connected to the output shaft of the engine 100 via a friction clutch 200.
　クラッチ２００は、例えば、図示しないクラッチペダル又はエアアクチュエータなどにより円盤状の摩擦係合要素が断接し、エンジン１００の回転駆動力を伝達又は遮断する機械要素である。 The clutch 200 is a mechanical element that transmits or cuts off the rotational driving force of the engine 100 by connecting and disconnecting a disk-like friction engagement element by, for example, a clutch pedal or an air actuator (not shown).
　レンジ式変速機３００は、シフトレバー４００により手動変速される主変速機３２０と、主変速機３２０の出力軸に連結されたレンジなどの副変速機３４０と、を含む。シフトレバー４００は、機械的なリンク機構５００を介して、主変速機３２０の変速装置３２２に接続されている。副変速機３４０は、エアリザーバ６００から供給される高圧エアにより副変速機３４０の変速装置３４２のエアシリンダ（アクチュエータ）を作動させて、主変速機３２０の各変速段を低速又は高速に切り替える。このため、シフトレバー４００には、エアリザーバ６００から供給される高圧エアを、副変速機３４０を低速に変速する、エアシリンダの低速側作動室に供給する第１の流路７００、又は、副変速機３４０を高速に変速する、エアシリンダの高速側作動室に供給する第２の流路７２０に選択的に切り替える切替レバー４２０が付設されている。シフトレバー４００に切替レバー４２０を付設することで、例えば、車両運転者はシフトレバー４００から手を離さずに、切替レバー４２０を操作することができる。 Range transmission 300 includes a main transmission 320 that is manually shifted by shift lever 400 and a sub-transmission 340 such as a range that is coupled to the output shaft of main transmission 320. The shift lever 400 is connected to the transmission 322 of the main transmission 320 via the mechanical link mechanism 500. The sub-transmission 340 operates the air cylinder (actuator) of the transmission 342 of the sub-transmission 340 with high-pressure air supplied from the air reservoir 600 to switch each gear stage of the main transmission 320 to low speed or high speed. For this reason, the shift lever 400 has a first flow path 700 that supplies high-pressure air supplied from the air reservoir 600 to the low-speed working chamber of the air cylinder that shifts the sub-transmission 340 at a low speed, or sub-shift. A switching lever 420 that selectively switches to the second flow path 720 that supplies the high-speed working chamber of the air cylinder that shifts the machine 340 at high speed is attached. By attaching the switching lever 420 to the shift lever 400, for example, the vehicle driver can operate the switching lever 420 without releasing the hand from the shift lever 400.
　なお、以下の一例においては、図２に示すように、切替レバー４２０を操作位置ＨＩまで操作すると副変速機３４０が高速に切り替えられ、切替レバー４２０を操作位置ＬＯまで操作すると副変速機３４０が低速に切り替えられるものとする。 In the following example, as shown in FIG. 2, when the switching lever 420 is operated to the operation position HI, the sub-transmission 340 is switched at a high speed, and when the switching lever 420 is operated to the operation position LO, the sub-transmission 340 is It shall be switched to low speed.
　主変速機３２０が６段変速の場合、切替レバー４２０を操作位置ＬＯまで操作した状態では、レンジ式変速機３００は、図３に示すように、低速側の１速～６速に切り替えられる。一方、切替レバー４２０を操作位置ＨＩまで操作した状態では、レンジ式変速機３００は、図３に示すように、高速側の７速から１２速に切り替えられる。なお、図３における「Ｒ１」及び「Ｒ２」は、後退段が低速又は高速に切り替えられることを示す。 When the main transmission 320 is a six-speed shift, the range-type transmission 300 is switched to the first to sixth speeds on the low speed side as shown in FIG. 3 when the switching lever 420 is operated to the operation position LO. On the other hand, in the state where the switching lever 420 is operated to the operation position HI, the range type transmission 300 is switched from the 7th speed on the high speed side to the 12th speed as shown in FIG. Note that “R1” and “R2” in FIG. 3 indicate that the reverse gear is switched to low speed or high speed.
　このような変速を実現するために、シフトレバー４００及び副変速機３４０には、図４に示すような制御回路が組み込まれている。即ち、エアリザーバ６００から供給される高圧エアは、第１の配管４０２を介して流路切替弁４０４の入力ポート４０４Ａに供給されると共に、第２の配管４０６（制御流体の供給通路）を介して流路切替弁４０４の制御ポート４０４Ｂに供給される。第２の配管４０６には、高圧エアの流通方向に沿って、切替レバー４２０により作動する開閉弁（図示せず）、常開式の電磁開閉弁４０８がこの順番で配設される。流路切替弁４０４は、制御ポート４０４Ｂに制御流体（高圧エア）が供給されている場合、入力ポート４０４Ａに供給された高圧エアを第１の出力ポート４０４Ｃから第１の流路７００に出力する。また、流路切替弁４０４は、制御ポート４０４Ｂに制御流体が供給されていない場合（大気開放の場合）、入力ポート４０４Ａに供給された高圧エアを第２の出力ポート４０４Ｄから第２の流路７２０に出力する。そして、第１の流路７００の先端は、副変速機３４０を低速に切り替える、エアシリンダ３４４の低速側作動室３４４Ａに連通接続される。一方、第２の流路７２０の先端は、副変速機３４０を高速に切り替える、エアシリンダ３４４の高速側作動室３４４Ｂに連通接続される。 In order to realize such a shift, a control circuit as shown in FIG. 4 is incorporated in the shift lever 400 and the auxiliary transmission 340. That is, the high-pressure air supplied from the air reservoir 600 is supplied to the input port 404A of the flow path switching valve 404 via the first pipe 402, and via the second pipe 406 (control fluid supply passage). It is supplied to the control port 404B of the flow path switching valve 404. On the second pipe 406, an open / close valve (not shown) operated by a switching lever 420 and a normally open electromagnetic open / close valve 408 are arranged in this order along the flow direction of high-pressure air. The flow path switching valve 404 outputs the high pressure air supplied to the input port 404A from the first output port 404C to the first flow path 700 when the control fluid (high pressure air) is supplied to the control port 404B. . In addition, when the control fluid is not supplied to the control port 404B (when the atmosphere is open), the flow path switching valve 404 sends the high-pressure air supplied to the input port 404A from the second output port 404D to the second flow path. Output to 720. And the front-end | tip of the 1st flow path 700 is connected to the low speed side working chamber 344A of the air cylinder 344 which switches the subtransmission 340 to low speed. On the other hand, the tip of the second flow path 720 is connected in communication with a high-speed working chamber 344B of the air cylinder 344 that switches the auxiliary transmission 340 to a high speed.
　このため、電磁開閉弁４０８の非作動状態においては、シフトレバー４００に付設された切替レバー４２０を操作位置ＬＯまで操作すると、流路切替弁４０４の制御ポート４０４Ｂに制御流体が供給され、エアリザーバ６００の高圧エアが第１の配管４０２及び第１の流路７００を介してエアシリンダ３４４の低速側作動室３４４Ａに供給される。一方、シフトレバー４００に付設された切替レバー４２０を操作位置ＨＩまで操作すると、流路切替弁４０４の制御ポート４０４Ｂが大気開放され、エアリザーバ６００の高圧エアが第１の配管４０２及び第２の流路７２０を介してエアシリンダ３４４の高速側作動室３４４Ｂに供給される。そして、エアシリンダ３４４の低速側作動室３４４Ａに高圧エアが供給されると、副変速機３４０が低速に切り替えられ、エアシリンダ３４４の高速側作動室３４４Ｂに高圧エアが供給されると、副変速機３４０が高速に切り替えられる。 For this reason, when the electromagnetic on-off valve 408 is not operated, when the switching lever 420 attached to the shift lever 400 is operated to the operating position LO, the control fluid is supplied to the control port 404B of the flow path switching valve 404, and the air reservoir 600 Is supplied to the low-speed working chamber 344 </ b> A of the air cylinder 344 through the first pipe 402 and the first flow path 700. On the other hand, when the switching lever 420 attached to the shift lever 400 is operated to the operation position HI, the control port 404B of the flow path switching valve 404 is opened to the atmosphere, and the high pressure air of the air reservoir 600 is supplied to the first pipe 402 and the second flow. The air is supplied to the high-speed working chamber 344B of the air cylinder 344 via the path 720. When high pressure air is supplied to the low speed side working chamber 344A of the air cylinder 344, the subtransmission 340 is switched to low speed, and when high pressure air is supplied to the high speed side working chamber 344B of the air cylinder 344, The machine 340 is switched at high speed.
　レンジ式変速機３００の制御系として、主変速機３２０の変速装置３２２には、主変速機３２０の変速状態を検出すべく、例えば、主変速機３２０がニュートラルに変速されているときにＯＮ信号を出力するニュートラルスイッチ８００が取り付けられている。副変速機３４０の変速装置３４２には、副変速機３４０の変速状態を検出すべく、例えば、副変速機３４０が低速に変速されているときにＯＮ信号を出力するレンジロースイッチ８２０が取り付けられている。クラッチ２００には、クラッチ２００の断接状態を検出すべく、例えば、クラッチ２００が切断されたときにＯＮ信号を出力するクラッチスイッチ８４０が取り付けられている。さらに、副変速機３４０には、その出力軸の回転速度を検出する回転速度センサ８６０が取り付けられている。 As a control system for the range transmission 300, a transmission device 322 of the main transmission 320 detects, for example, an ON signal when the main transmission 320 is being shifted to neutral in order to detect the shift state of the main transmission 320. Is attached. In order to detect the shift state of the sub-transmission 340, for example, a range low switch 820 that outputs an ON signal when the sub-transmission 340 is shifted to a low speed is attached to the transmission 342 of the sub-transmission 340. ing. For example, a clutch switch 840 that outputs an ON signal when the clutch 200 is disconnected is attached to the clutch 200 in order to detect the connection / disconnection state of the clutch 200. Further, a rotation speed sensor 860 for detecting the rotation speed of the output shaft is attached to the auxiliary transmission 340.
　ニュートラルスイッチ８００、レンジロースイッチ８２０、クラッチスイッチ８４０及び回転速度センサ８６０の各出力信号は、コンピュータを内蔵したコントロールユニット９００に入力されている。そして、コントロールユニット９００は、フラッシュＲＯＭ（Read Only Memory）などの不揮発性メモリに格納された制御プログラムを実行することで、ニュートラルスイッチ８００、レンジロースイッチ８２０、クラッチスイッチ８４０及び回転速度センサ８６０からの各信号に応じて、副変速機３４０の高速から低速への切り替えを抑制すべく、電磁開閉弁４０８を電子制御する。 The output signals of the neutral switch 800, the range low switch 820, the clutch switch 840, and the rotation speed sensor 860 are input to a control unit 900 incorporating a computer. The control unit 900 executes a control program stored in a non-volatile memory such as a flash ROM (Read Only Memory), so that the neutral switch 800, the range low switch 820, the clutch switch 840, and the rotation speed sensor 860 In response to each signal, the electromagnetic on-off valve 408 is electronically controlled to suppress switching of the auxiliary transmission 340 from high speed to low speed.
　図５は、エンジン１００が稼働したことを契機として、コントロールユニット９００が所定時間ごとに繰り返し実行する制御プログラムの一例を示す。 FIG. 5 shows an example of a control program that the control unit 900 repeatedly executes every predetermined time when the engine 100 is operated.
　ステップ１（図では「Ｓ１」と略記する。以下同様。）では、コントロールユニット９００が、回転速度センサ８６０から副変速機３４０の出力軸の回転速度を読み込み、これが所定値より大きいか否かを判定する。ここで、所定値は、副変速機３４０を低速に切り替えるとエンジン１００がオーバレブするか否かを判定するための閾値であって、例えば、エンジン１００の許容上限回転速度、レンジ式変速機３００の減速比などを考慮して適宜決定することができる。そして、コントロールユニット９００は、回転速度が所定値より大きいと判定すれば処理をステップ２へと進める一方（Ｙｅｓ）、回転速度が所定値以下であると判定すれば処理を終了させる（Ｎｏ）。 In step 1 (abbreviated as “S1” in the figure, the same applies hereinafter), the control unit 900 reads the rotational speed of the output shaft of the sub-transmission 340 from the rotational speed sensor 860 and determines whether or not it is greater than a predetermined value. judge. Here, the predetermined value is a threshold value for determining whether or not the engine 100 is overrevised when the auxiliary transmission 340 is switched to a low speed. For example, the allowable upper limit rotational speed of the engine 100, the range type transmission 300 It can be appropriately determined in consideration of the reduction ratio. If the control unit 900 determines that the rotational speed is greater than the predetermined value, the control unit 900 advances the process to step 2 (Yes), and if it determines that the rotational speed is equal to or lower than the predetermined value, ends the process (No).
　ステップ２では、コントロールユニット９００が、レンジロースイッチ８２０の出力信号を読み込み、これがＯＦＦであるか否かを介して、副変速機３４０が高速に変速されているか否かを判定する。そして、コントロールユニット９００は、副変速機３４０が高速に変速されていると判定すれば処理をステップ３へと進める一方（Ｙｅｓ）、副変速機３４０が高速に変速されていないと判定すれば処理を終了させる（Ｎｏ）。 In step 2, the control unit 900 reads the output signal of the range low switch 820, and determines whether or not the sub-transmission 340 is shifted at high speed through whether or not it is OFF. Then, if the control unit 900 determines that the sub-transmission 340 is shifted at a high speed, the control unit 900 proceeds to step 3 (Yes), whereas if it determines that the sub-transmission 340 is not shifted at a high speed, the control unit 900 performs the process. Is terminated (No).
　ステップ３では、コントロールユニット９００が、ニュートラルスイッチ８００の出力信号を読み込み、これがＯＮであるか否かを介して、主変速機３２０がニュートラルに変速されているか否かを判定する。そして、コントロールユニット９００は、主変速機３２０がニュートラルに変速されていると判定すれば処理をステップ５へと進める一方（Ｙｅｓ）、主変速機３２０がニュートラルに変速されていないと判定すれば処理をステップ４へと進める（Ｎｏ）。 In step 3, the control unit 900 reads the output signal of the neutral switch 800, and determines whether or not the main transmission 320 is shifted to neutral through whether or not this is ON. If the control unit 900 determines that the main transmission 320 is shifted to the neutral position, the control unit 900 proceeds to step 5 (Yes), while determining that the main transmission 320 is not shifted to the neutral position. To step 4 (No).
　ステップ４では、コントロールユニット９００が、クラッチスイッチ８４０の出力信号を読み込み、これがＯＮであるか否かを介して、クラッチ２００が切断されているか否かを判定する。そして、コントロールユニット９００は、クラッチ２００が切断されていると判定すれば処理をステップ５へと進める一方（Ｙｅｓ）、クラッチ２００が切断されていないと判定すれば処理を終了させる（Ｎｏ）。 In step 4, the control unit 900 reads the output signal of the clutch switch 840, and determines whether or not the clutch 200 is disengaged through whether or not it is ON. If the control unit 900 determines that the clutch 200 is disengaged, the process proceeds to step 5 (Yes), while if it determines that the clutch 200 is not disengaged, the control unit 900 ends the process (No).
　ステップ５では、コントロールユニット９００が、電磁開閉弁４０８を作動させる。従って、流路切替弁４０４の制御ポート４０４Ｂへの制御流体の供給が遮断されることから、シフトレバー４００に併設された切替レバー４２０を操作位置ＬＯまで操作しても、副変速機３４０を低速に変速するエアシリンダ３４４の低速側作動室３４４Ａに高圧エアが供給されず、副変速機３４０の高速から低速への切り替えを抑制することができる。 In step 5, the control unit 900 operates the electromagnetic on-off valve 408. Accordingly, since the supply of the control fluid to the control port 404B of the flow path switching valve 404 is shut off, even if the switching lever 420 provided along with the shift lever 400 is operated to the operating position LO, the auxiliary transmission 340 is kept at a low speed. The high-pressure air is not supplied to the low-speed working chamber 344A of the air cylinder 344 that changes speed, and the switching of the auxiliary transmission 340 from high speed to low speed can be suppressed.
　かかるレンジ式変速機３００の変速制御によれば、副変速機３４０の出力軸の回転速度が所定値より大、副変速機３４０が高速に変速、かつ、主変速機３２０がニュートラルに変速又はクラッチ２００が切断されている場合、図６に示すように、電磁開閉弁４０８が作動する。このため、シフトレバー４００の切替レバー４２０を操作位置ＬＯまで操作しても、流路切替弁４０４の制御ポート４０４Ｂに制御流体が供給されることがなく、副変速機３４０の高速から低速への切り替えを抑制することができる。よって、副変速機３４０を操作する切替レバー４２０の操作状態を把握できなくとも、好ましくない変速段へのダウンシフトを抑制できる。 According to the shift control of the range type transmission 300, the rotation speed of the output shaft of the sub-transmission 340 is larger than a predetermined value, the sub-transmission 340 is shifted at a high speed, and the main transmission 320 is shifted to the neutral or clutch. When 200 is disconnected, the electromagnetic on-off valve 408 operates as shown in FIG. For this reason, even if the switching lever 420 of the shift lever 400 is operated to the operating position LO, the control fluid is not supplied to the control port 404B of the flow path switching valve 404, and the auxiliary transmission 340 is changed from a high speed to a low speed. Switching can be suppressed. Therefore, even if the operating state of the switching lever 420 that operates the sub-transmission 340 cannot be grasped, it is possible to suppress a downshift to an undesirable shift stage.
　レンジ式変速機３００の変速制御において、副変速機３４０の出力軸の回転速度が所定値より大であるときに、電磁開閉弁４０８を作動させて、副変速機３４０の低速への切り替えを抑制するようにしてもよい。なお、この条件に加えて、副変速機３４０が高速に変速されているか否か、主変速機３２０がニュートラルに変速されているか否か、クラッチ２００が切断されているか否かを判定することで、電磁開閉弁４０８の作動頻度が低減し、例えば、これを作動させる電力を抑制することができる。また、副変速機３４０の出力軸の回転速度に代えて、例えば、これに関連する車速などを使用することもできる。 In the shift control of the range type transmission 300, when the rotational speed of the output shaft of the sub-transmission 340 is larger than a predetermined value, the electromagnetic on-off valve 408 is operated to suppress the sub-transmission 340 from switching to a low speed. You may make it do. In addition to this condition, it is determined whether or not the sub-transmission 340 is shifted at high speed, whether or not the main transmission 320 is shifted to neutral, and whether or not the clutch 200 is disengaged. The operating frequency of the electromagnetic on-off valve 408 is reduced, and for example, the electric power for operating it can be suppressed. Further, instead of the rotational speed of the output shaft of the sub-transmission 340, for example, the vehicle speed related thereto can be used.
　クラッチ２００が切断されているか否かを判定することによって、電磁開閉弁４０８の作動速度が遅い場合にも、副変速機３４０が低速に切り替えられることを高精度に抑制することができる。即ち、電磁開閉弁４０８の作動速度が遅い場合には、副変速機３４０の出力軸の回転速度が所定値より大きくなった直後に、切替レバー４２０を操作位置ＬＯまで操作すると、流路切替弁４０４の制御ポート４０４Ｂへの制御流体の供給を遮断するまでにある程度の時間を要する。このため、副変速機３４０が低速に切り替わってしまうおそれがある。しかし、レンジ式変速機３００の変速に先立って、クラッチペダルが踏み込まれるという運転特性を加味することで、電磁開閉弁４０８の作動速度の如何にかかわらず、副変速機３４０が低速に切り替えられることを高精度に抑制することができる。 By determining whether or not the clutch 200 is disengaged, it is possible to highly accurately prevent the auxiliary transmission 340 from being switched to a low speed even when the operation speed of the electromagnetic on-off valve 408 is low. That is, when the operating speed of the electromagnetic opening / closing valve 408 is slow, the flow path switching valve is operated when the switching lever 420 is operated to the operating position LO immediately after the rotational speed of the output shaft of the sub-transmission 340 becomes greater than a predetermined value. A certain amount of time is required until the supply of the control fluid to the control port 404B of 404 is cut off. For this reason, the auxiliary transmission 340 may be switched to a low speed. However, the sub-transmission 340 can be switched to a low speed regardless of the operating speed of the electromagnetic on-off valve 408 by taking into account the operation characteristic that the clutch pedal is depressed prior to the shift of the range type transmission 300. Can be suppressed with high accuracy.
　流路切替弁４０４の作動特性が逆の場合、即ち、制御ポート４０４Ｂに制御流体が供給されていないとき、入力ポート４０４Ａに供給された高圧エアを第１の出力ポート４０４Ｃから出力し、制御ポート４０４Ｂに制御流体が供給されているとき、入力ポート４０４Ａに供給された高圧エアを第２の出力ポート４０４Ｄから出力する場合には、次のようにすればよい。即ち、図７に示すように、シフトレバー４００に付設された切替レバー４２０をバイパスして、エアリザーバ６００から流路切替弁４０４の制御ポート４０４Ｂに制御流体を供給する第３の配管４１０（制御流体の供給通路）を開閉する、常閉式の電磁開閉弁４０８を配設する。 When the operation characteristic of the flow path switching valve 404 is reversed, that is, when the control fluid is not supplied to the control port 404B, the high-pressure air supplied to the input port 404A is output from the first output port 404C, and the control port 404B When the high-pressure air supplied to the input port 404A is output from the second output port 404D when the control fluid is supplied to the 404B, the following may be performed. That is, as shown in FIG. 7, the third pipe 410 (control fluid) that bypasses the switching lever 420 attached to the shift lever 400 and supplies the control fluid from the air reservoir 600 to the control port 404B of the flow path switching valve 404. A normally-closed electromagnetic on-off valve 408 that opens and closes the supply passage is provided.
　そして、副変速機３４０の低速への切り替えを抑制する場合には、先の実施形態と同様に、電磁開閉弁４０８を作動させ、シフトレバー４００の切替レバー４２０の操作状態にかかわらず、流路切替弁４０４の制御ポート４０４Ｂに制御流体が供給されるようにすればよい。なお、この作用及び効果は、先の実施形態と同様であるので、その説明は省略するものとする。必要があれば、先の説明を参照されたい。 And when switching to the low speed of the subtransmission 340 is suppressed, the electromagnetic on-off valve 408 is operated similarly to the previous embodiment, and the flow path regardless of the operating state of the switching lever 420 of the shift lever 400. The control fluid may be supplied to the control port 404B of the switching valve 404. In addition, since this effect | action and effect are the same as that of previous embodiment, the description shall be abbreviate | omitted. Please refer to the previous explanation if necessary.
　副変速機３４０を低速又は高速に切り替える作動流体としては、高圧エアに限らず、油圧ポンプなどで所定圧力に調圧された油圧などであってもよい。 The working fluid for switching the sub-transmission 340 to low speed or high speed is not limited to high-pressure air, and may be hydraulic pressure adjusted to a predetermined pressure by a hydraulic pump or the like.
　　３００　レンジ式変速機
　　３２０　主変速機
　　３４０　副変速機
　　３４４　エアシリンダ
　　３４４Ａ　低速側作動室
　　３４４Ｂ　高速側作動室
　　４００　シフトレバー
　　４０４　流路切替弁
　　４０４Ｂ　制御ポート
　　４０６　第２の配管
　　４０８　電磁開閉弁
　　４１０　第３の配管
　　４２０　切替レバー
　　６００　エアリザーバ
　　８００　ニュートラルスイッチ
　　８２０　レンジロースイッチ
　　８４０　クラッチスイッチ
　　８６０　回転速度センサ
　　９００　コントロールユニット 300 Range type transmission 320 Main transmission 340 Sub transmission 344 Air cylinder 344A Low speed side working chamber 344B High speed side working chamber 400 Shift lever 404 Flow path switching valve 404B Control port 406 Second piping 408 Electromagnetic switching valve 410 Third Piping 420 Switching lever 600 Air reservoir 800 Neutral switch 820 Range low switch 840 Clutch switch 860 Rotational speed sensor 900 Control unit

Claims (14)

  1. 　シフトレバーにより手動変速される主変速機に対して、アクチュエータの作動室に供給される作動流体により低速又は高速に変速される副変速機が連結されたレンジ式変速機の制御装置であって、
    　制御ポートに制御流体が供給されているときに、前記副変速機を低速に切り替える、前記アクチュエータの低速側作動室に作動流体を供給する一方、前記制御ポートに制御流体が供給されていないときに、前記副変速機を高速に切り替える、前記アクチュエータの高速側作動室に作動流体を供給する流路切替弁と、
    　前記流路切替弁の制御ポートへの制御流体の供給通路に配設され、前記制御ポートへの制御流体の供給を制御する切替レバーと、
    　前記制御流体の供給通路を開閉する遠隔操作可能な開閉弁と、
    　前記副変速機の出力軸の回転速度が所定値より大きいときに、前記制御流体の供給通路を閉じるように前記開閉弁を制御するコントロールユニットと、
    　を有することを特徴とするレンジ式変速機の制御装置。     A control device for a range-type transmission in which a sub-transmission that is shifted at a low speed or a high speed by a working fluid supplied to a working chamber of an actuator is connected to a main transmission that is manually shifted by a shift lever,
    When the control fluid is supplied to the control port, the sub-transmission is switched to a low speed, and the working fluid is supplied to the low-speed working chamber of the actuator, while the control fluid is not supplied to the control port A flow path switching valve for supplying a working fluid to a high-speed working chamber of the actuator, which switches the auxiliary transmission at a high speed,
    A switching lever that is disposed in a control fluid supply passage to the control port of the flow path switching valve and controls the supply of the control fluid to the control port;
    A remotely operable on-off valve for opening and closing the supply passage of the control fluid;
    A control unit that controls the on-off valve so as to close the supply passage of the control fluid when the rotational speed of the output shaft of the auxiliary transmission is greater than a predetermined value;
    A control device for a range-type transmission, comprising:
  2. 　前記開閉弁は、常開式の電磁開閉弁である、
    　ことを特徴とする請求項１に記載のレンジ式変速機の制御装置。     The on-off valve is a normally open type electromagnetic on-off valve.
    The range type transmission control device according to claim 1.
  3. 　前記コントロールユニットは、前記回転速度が所定値より大きいことに加え、前記副変速機が高速に切り替えられているときに、前記開閉弁により前記制御流体の供給通路を開閉する、
    　ことを特徴とする請求項１又は請求項２に記載のレンジ式変速機の制御装置。     The control unit opens and closes the control fluid supply passage by the on-off valve when the sub-transmission is switched to high speed in addition to the rotational speed being greater than a predetermined value.
    The control device for a range type transmission according to claim 1 or 2, wherein the control device is a range type transmission.
  4. 　前記コントロールユニットは、前記回転速度が所定値より大きいことに加え、前記主変速機がニュートラルに変速されているとき、又は、前記クラッチが切断されているときに、前記開閉弁により前記制御流体の供給通路を開閉する、
    　ことを特徴とする請求項１～請求項３のいずれか１つに記載のレンジ式変速機の制御装置。     In addition to the rotational speed being greater than a predetermined value, the control unit is configured to control the control fluid by the on-off valve when the main transmission is shifted to neutral or when the clutch is disengaged. Open and close the supply passage,
    The range type transmission control device according to any one of claims 1 to 3, wherein:
  5. 　前記切替レバーは、前記シフトレバーに付設された、
    　ことを特徴とする請求項１～請求項４のいずれか１つに記載のレンジ式変速機の制御装置。     The switching lever is attached to the shift lever,
    The range type transmission control device according to any one of claims 1 to 4, wherein:
  6. 　前記作動流体及び前記制御流体は、エアリザーバから供給される高圧エアである、
    　ことを特徴とする請求項１～請求項５のいずれか１つに記載のレンジ式変速機の制御装置。     The working fluid and the control fluid are high-pressure air supplied from an air reservoir.
    The range type transmission control device according to any one of claims 1 to 5, wherein the control device is a range type transmission.
  7. 　シフトレバーにより手動変速される主変速機に対して、アクチュエータの作動室に供給される作動流体により低速又は高速に変速される副変速機が連結されたレンジ式変速機の制御装置であって、
    　制御ポートに制御流体が供給されていないときに、前記副変速機を低速に切り替える、前記アクチュエータの低速側作動室に作動流体を供給する一方、前記制御ポートに制御流体が供給されているときに、前記副変速機を高速に切り替える、前記アクチュエータの高速側作動室に作動流体を供給する流路切替弁と、
    　前記流路切替弁の制御ポートへの制御流体の供給を制御する切替レバーと、
    　前記切替レバーをバイパスして前記流路切替弁の制御ポートに制御流体を供給する制御流体の供給通路を開閉する遠隔操作可能な開閉弁と、
    　前記副変速機の出力軸の回転速度が所定値より大きいときに、前記制御流体の供給通路を開くように前記開閉弁を制御するコントロールユニットと、
    　を有することを特徴とするレンジ式変速機の制御装置。     A control device for a range-type transmission in which a sub-transmission that is shifted at a low speed or a high speed by a working fluid supplied to a working chamber of an actuator is connected to a main transmission that is manually shifted by a shift lever,
    When control fluid is not supplied to the control port, the sub-transmission is switched to low speed, while working fluid is supplied to the low-speed working chamber of the actuator, while control fluid is supplied to the control port A flow path switching valve for supplying a working fluid to a high-speed working chamber of the actuator, which switches the auxiliary transmission at a high speed,
    A switching lever for controlling the supply of control fluid to the control port of the flow path switching valve;
    A remotely-operable on-off valve that opens and closes a control fluid supply passage that bypasses the switching lever and supplies a control fluid to a control port of the flow path switching valve;
    A control unit that controls the on-off valve to open the control fluid supply passage when the rotational speed of the output shaft of the auxiliary transmission is greater than a predetermined value;
    A control device for a range-type transmission, comprising:
  8. 　前記開閉弁は、常閉式の電磁開閉弁である、
    　ことを特徴とする請求項７に記載のレンジ式変速機の制御装置。     The on-off valve is a normally closed electromagnetic on-off valve.
    The range type transmission control device according to claim 7.
  9. 　前記コントロールユニットは、前記回転速度が所定値より大きいことに加え、前記副変速機が高速に切り替えられているときに、前記開閉弁により前記制御流体の供給通路を開閉する、
    　ことを特徴とする請求項７又は請求項８に記載のレンジ式変速機の制御装置。     The control unit opens and closes the control fluid supply passage by the on-off valve when the sub-transmission is switched to high speed in addition to the rotational speed being greater than a predetermined value.
    9. The control device for a range type transmission according to claim 7, wherein the control device is a range type transmission.
  10. 　前記コントロールユニットは、前記回転速度が所定値より大きいことに加え、前記主変速機がニュートラルに変速されているとき、又は、前記クラッチが切断されているときに、前記開閉弁により前記制御流体の供給通路を開閉する、
    　ことを特徴とする請求項７～請求項９のいずれか１つに記載のレンジ式変速機の制御装置。     In addition to the rotational speed being greater than a predetermined value, the control unit is configured to control the control fluid by the on-off valve when the main transmission is shifted to neutral or when the clutch is disengaged. Open and close the supply passage,
    10. The control device for a range type transmission according to claim 7, wherein the control device is a range type transmission.
  11. 　前記切替レバーは、前記シフトレバーに付設された、
    　ことを特徴とする請求項７～請求項１０のいずれか１つに記載のレンジ式変速機の制御装置。     The switching lever is attached to the shift lever,
    11. The control device for a range type transmission according to claim 7, wherein the control device is a range type transmission.
  12. 　前記作動流体及び前記制御流体は、エアリザーバから供給される高圧エアである、
    　ことを特徴とする請求項７～請求項１１のいずれか１つに記載のレンジ式変速機の制御装置。     The working fluid and the control fluid are high-pressure air supplied from an air reservoir.
    12. The control device for a range type transmission according to claim 7, wherein the control device is a range type transmission.
  13. 　シフトレバーにより手動変速される主変速機と、
    　アクチュエータの作動室に供給される作動流体により低速又は高速に変速される副変速機と、
    　制御ポートに制御流体が供給されているときに、前記副変速機を低速に切り替える、前記アクチュエータの低速側作動室に作動流体を供給する一方、前記制御ポートに制御流体が供給されていないときに、前記副変速機を高速に切り替える、前記アクチュエータの高速側作動室に作動流体を供給する流路切替弁と、
    　前記流路切替弁の制御ポートへの制御流体の供給通路に配設され、前記制御ポートへの制御流体の供給を制御する切替レバーと、
    　前記制御流体の供給通路を開閉する遠隔操作可能な開閉弁と、
    　を有するレンジ式変速機を電子制御するコントロールユニットが、
    　前記副変速機の出力軸の回転速度が所定値より大きいときに、前記制御流体の供給通路を閉じるように前記開閉弁を制御する、
    　ことを特徴とするレンジ式変速機の制御方法。     A main transmission manually shifted by a shift lever;
    A sub-transmission that is shifted at a low speed or a high speed by a working fluid supplied to a working chamber of the actuator;
    When the control fluid is supplied to the control port, the sub-transmission is switched to a low speed, and the working fluid is supplied to the low-speed working chamber of the actuator, while the control fluid is not supplied to the control port A flow path switching valve for supplying a working fluid to a high-speed working chamber of the actuator, which switches the auxiliary transmission at a high speed,
    A switching lever that is disposed in a control fluid supply passage to the control port of the flow path switching valve and controls the supply of the control fluid to the control port;
    A remotely operable on-off valve for opening and closing the supply passage of the control fluid;
    A control unit that electronically controls a range-type transmission having
    When the rotational speed of the output shaft of the sub-transmission is greater than a predetermined value, the open / close valve is controlled to close the control fluid supply passage;
    A control method for a range type transmission.
  14. 　シフトレバーにより手動変速される主変速機と、
    　アクチュエータの作動室に供給される作動流体により低速又は高速に変速される副変速機と、
    　制御ポートに制御流体が供給されていないときに、前記副変速機を低速に切り替える、前記アクチュエータの低速側作動室に作動流体を供給する一方、前記制御ポートに制御流体が供給されているときに、前記副変速機を高速に切り替える、前記アクチュエータの高速側作動室に作動流体を供給する流路切替弁と、
    　前記流路切替弁の制御ポートへの制御流体の供給を制御する切替レバーと、
    　前記切替レバーをバイパスして前記流路切替弁の制御ポートに制御流体を供給する制御流体の供給通路を開閉する遠隔操作可能な開閉弁と、
    　を有するレンジ式変速機を電子制御するコントロールユニットが、
    　前記副変速機の出力軸の回転速度が所定値より大きいときに、前記制御流体の供給通路を開くように前記開閉弁を制御する、
    　ことを特徴とするレンジ式変速機の制御方法。     A main transmission manually shifted by a shift lever;
    A sub-transmission that is shifted at a low speed or a high speed by a working fluid supplied to a working chamber of the actuator;
    When control fluid is not supplied to the control port, the sub-transmission is switched to low speed, while working fluid is supplied to the low-speed working chamber of the actuator, while control fluid is supplied to the control port A flow path switching valve for supplying a working fluid to a high-speed working chamber of the actuator, which switches the auxiliary transmission at a high speed,
    A switching lever for controlling the supply of control fluid to the control port of the flow path switching valve;
    A remotely-operable on-off valve that opens and closes a control fluid supply passage that bypasses the switching lever and supplies a control fluid to a control port of the flow path switching valve;
    A control unit that electronically controls a range-type transmission having
    When the rotational speed of the output shaft of the auxiliary transmission is greater than a predetermined value, the open / close valve is controlled to open the control fluid supply passage;
    A control method for a range type transmission.
PCT/JP2013/081647 2012-12-18 2013-11-25 Control device and control method for range-type transmission WO2014097828A1 (en)

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JPS60245858A (en) * 1984-05-21 1985-12-05 Toyota Motor Corp Controller of automatic speed change gear
JPH0251662A (en) * 1988-04-27 1990-02-21 Eaton Corp Composite transmission and controller thereof
JPH06235457A (en) * 1992-12-11 1994-08-23 Eaton Corp Down-shift controller

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