JPH0622658U - Shift control device of transmission - Google Patents

Abstract

(57) [Summary] [Object] The present invention has an object to provide a shift control device for a transmission, which enables a driver to instruct a fast shift as required such as sudden acceleration or start on a slope. [Structure] A sudden shift request switch is provided, and the sub transmission is operated after the main transmission becomes neutral according to the signal from the sudden shift request switch. A control device is provided that meshes the gears of the machine.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a shift control device for an electronically controlled mechanical automatic transmission that has a main transmission and a high / low two-stage range type sub transmission.

[0002]

[Prior art]

 When the mechanical transmission is controlled by an electronic control system, the actuator operates with a magnetic valve to change gears in response to a driver's gear change instruction, so gear change mistakes can be prevented, but the gear change time is determined by the actuator output and control method. In particular, when the gear shift instruction is accompanied by the gear shift of the range type sub-transmission, it takes time because the gear shift spans both the main and sub transmissions (see, for example, Japanese Patent Application No. 3-5902 by the applicant). .

[0003]

[Problems to be solved by the device]

 However, there is a problem that the vehicle will stop after starting on a slope, etc., because the driver cannot try to change gears quickly by upshifting uphill.

Further, there is Japanese Patent Application No. 2-101010 by the present applicant, but there is a problem that the synchro wears when the main and sub transmissions are simultaneously shifted.

An object of the present invention is to provide a shift control device for a speed changer, which allows a driver to instruct a fast shift as required, such as sudden acceleration and start on a slope.

[0006]

[Means for Solving the Problems]

 According to the present invention, in a shift control device of an electronically controlled mechanical automatic transmission having a main transmission and a high / low two-stage range sub-transmission, a sudden shift request switch for a driver to request a fast shift. A control for engaging the gears of the main transmission after a predetermined time has elapsed after the sub-transmission gear shift signal was output after the main transmission became neutral by the signal from the sudden gear shift request switch Equipment is provided.

It is preferable that the sudden shift request switch be provided with a kick down region when the accelerator pedal is fully opened, or with a switch provided on the shift lever.

[0008]

[Action]

 Conventionally, it was necessary to determine about 0.4 seconds because it was determined whether or not the shift of the sub transmission was completed, and the gears of the main transmission were engaged after the completion of the shift. In the present application, the speed change speed is fast because the gears of the main transmission are controlled to mesh with each other after a predetermined time (for example, 0.2 seconds) after the sub-transmission gear shift signal is output by the signal from the sudden gear shift request switch.

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, a transmission 3 is attached to an engine 1 via a mechanical clutch 2, a sub transmission 3 A is attached to the transmission 3, and an output shaft thereof is shown via a propeller shaft 4. The engine 1 is provided with a fuel injection pump 5, and the fuel injection pump 5 is provided with a drive unit 5a.

Further, a shift set control device 10 is provided above the transmission 3, and a sub-transmission 3A is provided with a range setting device 12 that operates the sub-transmission in a range type.

Further, the control device 20 that controls the transmission 3 based on the lever position of the shift tower 19 includes a shift set control device 10, a clutch stroke sensor 6, a clutch actuator 7, a gear rotation sensor 8, and a vehicle speed sensor, respectively. 9, a shift position detecting device 11 and a range position detecting device 14a are connected.

A clutch switch 18 is provided on the clutch pedal 17, and a potentiometer 16 is attached to the accelerator pedal 15. The potentiometer 16 is connected to a control device 20 and a drive unit 5 a of the fuel injection pump 5 is provided. Are connected to the control device 20.

In FIG. 2, a range set control device 12, a range position detection device 14a, a shift set control device 10, a shift position detection device 11, a gear rotation sensor 8 and a vehicle speed sensor 9 are respectively transmission (T / M) control circuits. It is connected to 20d.

The clutch actuator 7 and the clutch stroke sensor 6 are connected to a clutch control circuit 20f, the injection pump drive unit 5a is connected to an accelerator control circuit, and the accelerator potentiometer is connected to a shift change control unit 20a.

FIG. 3 is a characteristic diagram showing the relationship between the accelerator opening of the actuator 16 and the output voltage. The fully open range is used as the kickdown range, and the output at this time is input to the shift change control section as a sudden shift signal.

The operation will be described below with reference to FIG.

In operation, the accelerator pedal is depressed to the kick-down region shown in FIG. 3 to instruct a sudden shift, and the shift lever is moved to the shift-up position to instruct a shift-up (step S1). The clutch is disengaged (step S2), and it is determined whether the clutch disengagement is completed (step S3). If NO, the process returns, and if YES, the meshed gear of the main transmission is disengaged (step S4). It is determined whether the main transmission is in neutral (step S5). If NO, the process returns, and if YES, the range section is shifted (step S6). It is determined whether or not the energization time of the magnetic valve for shifting the range section has passed a predetermined t second (for example, 0.2 second) (step S7).

If NO, the process returns, and if YES, the main transmission is shifted (step S8). It is determined whether or not the gear shift of the main transmission is completed (step S9), the process returns if NO, and the clutch is engaged if YES (step S10). It is judged whether or not the clutch engagement is completed (step S11), the process returns if NO, and the control ends if YES.

Here, comparing with the flowchart of the conventional control shown in FIG. 7, it can be seen that, in step S7, only the completion of the shift of the range portion is conventionally confirmed, and the time management is not performed. Since it took about 0.4 seconds in this case, it can be seen that the shift time of 0.2 seconds was shortened in this example.

FIG. 5 shows another embodiment of the present invention, except that the shift lever 19a of the shift tower 19 is provided with a function switch 21 for instructing the controller to perform a sudden shift, and the kickdown of the potentiometer of the accelerator pedal is removed. Is the same as in the first embodiment.

FIG. 6 shows a block diagram of the control device shown in FIG. 5, and only the shift lever function switch 21 is added to FIG.

Therefore, the operation is the same as in the kick down area of the potentiometer of the accelerator pedal, because the function switch 21 of the shift lever instructs a rapid shift to shift gears.

[0024]

[Effect of device]

 Since the present invention is configured as described above, when a sudden shift is required, such as when accelerating or starting on a slope, the accelerator pedal is pushed to the kick down area, which is the sudden shift request switch, or the shift lever The speed change time can be shortened by turning on the sudden speed change switch provided at the position to change the speed.

Further, since the main transmission is set to shift at the same time when the shift of the range section is completed for a predetermined time, problems such as abrasion of the synchro and misshift do not occur.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is a control block diagram of FIG.

FIG. 3 is a diagram showing a relationship between an accelerator opening and an output voltage in FIG.

FIG. 4 is a control flowchart of FIG.

FIG. 5 is an overall configuration diagram showing another embodiment of the present invention.

6 is a control block diagram of FIG.

FIG. 7 is a diagram showing an example of a conventional control flow chart.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Engine 2 ... Clutch 3 ... Transmission 3A ... Sub transmission 5 ... Fuel injection pump 10 ... Gear shift unit 15 ... Accelerator pedal 16 ... Potentiometer 19 ... Shift tower 20 ... Control device 21 ... Function switch

Claims (1)

[Scope of utility model registration request] 1. A shift control device for an electronically controlled mechanical automatic transmission having a main transmission and a high-low two-stage range type sub-transmission, and a sudden shift request switch for a driver to request a fast shift. A control device which is provided, operates the sub-transmission after the main transmission becomes neutral by a signal from the sudden gear shift request switch, and meshes the gears of the main transmission after a lapse of a predetermined time after the sub-transmission gear shift signal is output. A shift control device for a transmission, comprising: