JPH0571537U - Automatic transmission for transmission - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To automatically shift up at the hold position in an automatic transmission in which the shift lever is not in the auto position but controlled by up, down, hold, and reverse. [Structure] With the shift lever 41 in the hold position,
A control function is provided to output a signal for shifting up by one stage when the rotation speed of the engine 10 exceeds a predetermined rotation speed and the rotation speed elapses for a predetermined time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic transmission of a transmission having a shift lever having an upshift, a downshift, a hold position and a reverse position, an actuator for connecting and disconnecting a clutch, and a controller for the actuator.

[0002]

[Prior Art]

 In heavy-duty vehicles such as tractors, in order to obtain high driving force, the gear ratio of the transmission has been reduced to multiple stages. For this reason, it takes a lot of gear shifting operations to increase the speed from the start to the acceleration, which imposes a heavy burden on the driver.

On the other hand, for example, in the transmission which is proposed by the present applicant in Japanese Utility Model Application Laid-Open No. 61-161122, in which automatic shifting is performed, the shift operation is not necessary because the automatic mode is set. It is convenient for

[0004]

[Problems to be solved by the device]

 In conventional transmissions that perform automatic gear shifting, gear shifting is performed unintentionally, it is not possible for the driver to selectively determine the shift stage, and it is necessary to switch from automatic mode to manual mode. There was a problem to do.

That is, in the transmission having the shift pattern configuration having the automatic position as shown in FIG. 7, when the automatic mode (A) is set as shown in FIG. 8 (step S20), the automatic shift is performed according to the map ( When the up (Up) operation is performed in step S21) (step S22), shift up is performed (step S23). When the down (Dn) operation is performed (step S24), the down operation is performed (step S25), and the neutral (N) operation is performed (step S26), the neutral set is performed (step S27). When the reverse (R) operation is performed (step S28), and the vehicle speed is zero (step S29), the reversing set is performed (step S30). In this way, it is inconvenient because it is necessary to switch the automatic mode to the manual mode and determine the shift stage by operating the shift lever.

The present invention provides an automatic transmission for a transmission, which can automatically shift up at a hold position in an automatic transmission that is controlled by up / down, hold, and reverse without a shift lever having an automatic position. The purpose is to do.

[0007]

[Means for Solving the Problems]

 According to the present invention, in a transmission automatic transmission having a shift lever having an upshift, a downshift, a hold position and a reverse position, and an actuator for engaging and disengaging a clutch and a controller for the actuator, the controller is provided. In addition, when the shift lever is in the hold position, the engine rotation speed exceeds a predetermined rotation speed, and a control function is provided to output a signal for shifting up by one step when the rotation speed has passed a certain time.

[0008]

[Action]

 The automatic transmission of the transmission configured as described above is basically controlled manually, but since the gear can be changed automatically, it can be performed as if it were a manual operation that is comfortable for the driver. Also, it has an auto function during acceleration, which makes it easy to operate during acceleration.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an overall configuration of a diesel engine equipped with an automatic transmission embodying the present invention. A transmission 30 is attached to the engine 10 via a mechanical clutch 20, and its output shaft is connected to a rear axle (not shown) via a propeller shaft 37.

The engine 10 is provided with a fuel injection pump 11, and the pump 11 is provided with a slot actuator 12.

The clutch 20 is provided with a clutch actuator 21 for engaging and disengaging the clutch, a clutch stroke sensor 22 for detecting the stroke of the clutch, and an engine rotation sensor 23.

The transmission 30 includes a transmission actuator 31 that shifts the transmission, a position sensor 32 that detects a shift position, a gear rotation sensor 33, a vehicle speed sensor 34, and range switching / splitter switching actuators 35 and 38. , Range and splitter position sensors 36, 39 are provided.

On the other hand, a shift tower 40 is provided in the cab, and has a shift pattern of reverse R, neutral N, shift up U, shift down D, and hold H for holding the current shift stage. Further, an accelerator sensor 43 for detecting the opening degree of the accelerator pedal 42 and a clutch sensor 45 for detecting the position of the clutch pedal 44 are provided.

These members 12, 22, 23, 31, 32, 33, 34, 35, 36, 38, 39, 40, 43 and 45 are connected to a transmission control unit 46, and this unit is An engine control unit 47, a display monitor 48, and a magnetic valve group 49 are connected to 46.

A function switch switch 41 a is provided on the top of the shift lever 41 of the shift tower 40 and is connected to the control unit 46. Further, as shown in FIGS. 2 and 3, position switches SFR, SFF, SN1 and SN2 corresponding to respective positions of the shift lever 41 are provided and connected to the control unit 46.

In the control, as shown in FIG. 4, when the shift-up U operation is selected by the shift lever 41 (step S1), the position switch SFF is closed, and based on this signal, the control unit 46 causes the transmission actuator 31 to operate. Are controlled to shift up (step S2). When the downshift D operation is selected (step S3), the position switch SFR is closed and the control unit 46 downshifts (step S4). When the neutral N operation is selected (step S5), the position switch SN1 is closed, and the control unit 46 performs neutral setting (step S6). When the reverse R operation is selected (step S7), the position switches SFF and SN1 are closed, and based on these signals, the control unit 46 determines that the signal from the vehicle speed sensor 34 is zero (step S7). S8) and reverse setting is performed (step S9). When hold H is selected (step S10), the position switch SN2 is closed, and based on this signal, the control unit 46 causes the engine control unit after transmission based on the signals from the slot actuator 12 and the engine rotation sensor 23. The control output of 47, such as the fuel injection amount and the engine speed, exceeds the specified value (step S11) as indicated by the shaded area A in the control map M1 of FIG. When the time (for example, one second) has elapsed (step S12), the transmission actuator 31 is controlled to automatically perform upshift by one step (step S13). As shown by the shaded area B in the control map diagram M2 of FIG. 6, this automatic shift-up occurs when the accelerator opening from the accelerator sensor 43 and the engine speed exceed the specified values for a certain period of time. You can do it.

[0018]

[Effect of the device]

 Since the present invention is configured as described above, when starting from acceleration and accelerating, when the conditions that indicate the driver's intention to shift up, that is, the fuel injection amount, accelerator opening, and engine speed are specific conditions, , It automatically shifts up even if the shift lever is not operated, eliminating the need for complicated lever operation and making it possible to easily achieve a shift stage that suits the driver's intention.

Further, a shift-up automatic gear shifting function can be added without providing a switch for switching between the automatic mode and the manual mode.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a diesel engine equipped with an automatic transmission embodying the present invention.

FIG. 2 is an explanatory diagram of a shift pattern.

FIG. 3 is an explanatory diagram of a shift position switch.

FIG. 4 is a control flowchart.

[Fig. 5] Control map diagram

FIG. 6 is another control map diagram.

FIG. 7 is an explanatory diagram of a conventional shift pattern having an automatic position.

FIG. 8 is a conventional control flowchart.

[Explanation of symbols]

 10 ... Engine 11 ... Fuel injection pump 12 ... Throttle actuator 20 ... Clutch 21 ... Clutch actuator 22 ... Clutch stroke sensor 23 ... Engine rotation sensor 30 ... Transmission 31. ..Transmission actuator 32 ... Position sensor 33 ... Gear rotation sensor 34 ... Vehicle speed sensor 35 ... Actuator 36 ... Actuator 40 ... Shift tower 41 ... Shift lever 41a ... Function switch 42 ... Accelerator pedal 43 ... Accelerator sensor 44 ... Clutch pedal 45 ... Clutch sensor 46 ... Transmission control unit 47 ... Engine control unit 48 ... Display Nita 49 ... magnetic valve

Claims (1)

[Scope of utility model registration request] 1. An automatic transmission of a transmission, comprising a shift lever having an upshift, a downshift, a hold position and a reverse position, an actuator for engaging and disengaging a clutch, and a control device for the actuator. A transmission having a control function for outputting a signal for shifting up by one stage when the engine speed exceeds a predetermined speed and the engine speed exceeds a predetermined speed while the lever is in the hold position. Automatic transmission.