JP2594268Y2 - Automatic transmission - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic transmission for changing the vehicle speed in accordance with a driver's operation in a motor vehicle.

[0002]

2. Description of the Related Art An engine of an automobile requires a large driving force at the time of starting or climbing a hill, and when traveling on a flat road surface, a high speed rotation capable of maintaining a desired speed is required from such a large driving force. . However, the engine generally has a constant torque almost independently of the rotational speed. Therefore, car in other vehicles, for example, real-Open No. 4-
As described in JP-A- 56-929 and JP-A- Hei 4-58418, the torque of the engine is increased by using various transmissions (transmissions) and transmitted to a drive shaft, so that the speed required during traveling can be improved. It has enough torque to adapt to various road conditions.

FIG. 3 is a diagram showing a configuration example of a conventional automatic transmission. In the figure, an engine 31 includes a clutch 32
Is mechanically connected to the transmission unit 33 via the. Engine 3
1 includes a rotation sensor (RS) 34 for detecting the number of revolutions of the engine and a control device (GC) 35 for controlling the output, and the clutch 32 disconnects and connects the transmission of power between the engine 31 and the transmission 33. Clutch actuator (C
A) 36 and a clutch stroke sensor (CS) 37 for detecting such a state of connection / disconnection of power. The transmission unit 33 includes a gear shift actuator (GSA) 38 that switches the transmission ratio of the transmission unit according to an electric signal, a shift position sensor (SPS) 39 that detects a shift position,
A vehicle speed sensor (SS) 40 that measures the rotational speed of the drive shaft to detect the vehicle speed. The outputs of the rotation sensor 34, the clutch stroke sensor 37, the shift position sensor 39, and the vehicle speed sensor 40 are respectively connected to corresponding inputs of the control device 41, and the outputs of the control device 41 are connected to the control device 3 respectively.
5, the input of the gear shift actuator 38,
It is connected to one input of the clutch actuator 36. A clutch pedal 42 is mechanically connected to the other input of the clutch actuator 36 via a master cylinder 43. The shift lever 44 is rotatably mounted on the shift tower 45, and its output is connected to a corresponding input of the control device 41. Further, the control device 41 includes:
The output of the accelerator sensor 46 for detecting the accelerator opening is connected.

[0004] In the automatic transmission having such a configuration, as shown in FIG. 4, the control device 41 has an optimum speed to be set in the transmission unit 33 at a desired vehicle speed corresponding to a possible value of the accelerator opening. The gear ratios (gear stages) "1st to 6th" are obtained in advance, and are stored as a gear selection map corresponding to the accelerator opening and the vehicle speed, respectively. When the control device 41 detects that the shift lever 44 is set to the drive “D” through the shift tower 45, the accelerator sensor 46
Based on the accelerator opening detected by the vehicle speed and the vehicle speed detected by the vehicle speed sensor 40, the above-mentioned shift speed selection map is referred to, and the speed ratio indicated by the contents of the map (any one of "1st to 6th speed") (1) is set in the transmission section 33 via the gear shift actuator 38. However, if the control device 41 detects that the shift lever 44 is set to a position other than the drive “D”, the control device 41 does not perform the above-described automatic control of the gear ratio, and detects the rotation of the engine 31 detected by the rotation sensor 34. While monitoring the number, the clutch stroke detected by the clutch stroke sensor 37, the gear position detected by the shift position sensor 39, and the vehicle speed detected by the vehicle speed sensor 40, the system is adapted to the setting of the shift lever 44 via the gear shift actuator 38. The changed gear ratio is given to the gear change section 33. Note that, as shown in FIG.
Even if the switch 32 is not operated, the controller 41 automatically
Operated but not shown automatic / manual switch
With the clutch pedal 42 depressed by the driver
The clutch 32 is connected to the master cylinder 43 and the clutch
It can also be operated via the h actuator 36.
(See Japanese Utility Model Laid-Open No. 4-58418).

[0005]

Incidentally, in such a conventional automatic transmission, a shift stage selection map corresponding to the accelerator opening detected by the accelerator sensor 46 and the vehicle speed detected by the vehicle speed sensor 40 is used. Since the speed ratio of the speed change section 33 is set according to the content, the speed ratio is not necessarily switched at the timing when the accelerator pedal is depressed for the purpose of shifting, and the acceleration or the delay is delayed against the will of the driver. There was a case where deceleration was performed. Further, in such an automatic transmission, as long as the shift lever 44 is set to “D”, the speed ratio of the transmission unit 33 is controlled by the control device 4.
The vehicle speed is automatically set under the control of No. 1, and the vehicle speed cannot be exceptionally or appropriately increased or decreased according to the road surface or other conditions during traveling.

In the present invention, the gear shifting timing is set when the clutch pedal is depressed so as to match the driver's intention, and the clutch connection / disconnection speed is adjusted according to the driver's operation, thereby enabling the surroundings to be changed. It is another object of the present invention to increase or decrease the vehicle speed depending on the running condition.

[0007]

According to the present invention, an engine is provided.
It is provided on a transmission section mechanically connected via a latch,
A gear shift actuator that switches the gear ratio and a clutch
Switch for connecting and disconnecting power between the engine and the transmission
Clutch shift actuator and accelerator opening
Accelerator sensor for detecting and vehicle speed sensor for detecting vehicle speed
And the accelerator sensor and the vehicle speed sensor are connected to the input side.
The gear shift actuator, clutch shift
The actuator has a control device connected to the output side.
And the control device responds to the accelerator opening and the vehicle speed.
Including a shift stage selection map stored in advance, the shift lever
Under the condition that is set in the drive “D” range,
Accelerator opening and vehicle speed detected by accelerator sensor
The shift speed based on the vehicle speed detected by the sensor.
Refer to the selection map and select with the gear position selection map
The gear ratio via the gear shift actuator
Connected to the control device in the automatic transmission set in the section
Manual / automatic switching by the driver's operation.
Manual / automatic switch, clutch pedal,
Connected to the control device and provided on the clutch pedal
A clutch pedal sensor, wherein the control device is manually operated
・ Make sure that the automatic switch is set to manual.
And when you start shifting when you depress the clutch pedal
Judge and when not depressing the clutch pedal
There is a shift start determining means for determining that the shift is not started.
When the shift is started via the shift start determining means,
The gear ratio is determined with reference to the gear position selection map, and
Engine speed according to the gear ratio obtained as a result of
Therefore , isochronous control is performed .

[0008]

In the present invention, the control device is a shift lever.
Automatically detects that drive is set to drive "D".
Monitors the status of the contacts of the dynamic / manual switch. System
For the control device, the automatic / manual switch is set to the automatic side
If the access is obtained through the accelerator sensor,
Gear position based on the opening of the vehicle and the vehicle speed obtained from the vehicle speed sensor.
By referring to the selection map, the shift stage selection map
It waits while giving the transmission ratio obtained to the transmission section. this
In such a situation, set the automatic / manual switch to the manual side.
Once set, the gearshift operation is performed by the driver as follows:
Manual operation using the control device. That is, the control device
Depresses the clutch pedal via the shift start determination means.
Judge not to start shifting when not
Performs the process in (a) and shifts when the clutch pedal is depressed
Is determined to be activated, and the following process (b) is performed.
(B) The control unit operates until the clutch pedal is depressed.
Does not perform shift processing. (B) The control device is a clutch pedal
When it is detected that the
To carry out a shift process. When shifting gears, the clutch
Done. The control device is obtained via the accelerator sensor
Based on the accelerator opening and the vehicle speed obtained from the speed sensor.
And refers to the gear position selection map. Gear speed selection map
As a result of the reference, the gear ratio is obtained. Next, the resulting transformation
The engine speed e _i is determined according to the speed ratio . En
The rotation speed of the gin is almost equal to the rotation speed by isochronous control.
set to a value that matches e _i
Control). In this way, depending on vehicle speed and accelerator opening
The optimal gear ratio is set in the transmission section. In addition, the driver
When the control unit releases the clutch pedal, the control unit
The shift operation is terminated by stopping the lonas control, and the normal
Return to cell control.

[0009]

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In this embodiment, the configuration of the conventional automatic transmission is shown.
Parts that are the same as the parts are assigned the same reference numerals and descriptions thereof are omitted.
For simplicity, only the differences will be described.

The difference between the present invention and the conventional example shown in FIG. 3 is that a control device 11 is provided in place of the control device 41, and a clutch pedal sensor 12 comprising a contact which opens and closes in conjunction with the pedal is provided on the clutch pedal 42. In addition, a manual / automatic changeover switch 13 for performing manual / automatic changeover by an operation performed by a driver is provided. The contacts of the clutch pedal sensor 12 and the manual / automatic changeover switch 13 are connected to the input of the control device 11, and the output side thereof is connected. And a monitor unit 14 constituting an operation display unit of the present embodiment together with an automatic / manual switch 13.

[0012]

FIG. 2 is an operation flowchart of this embodiment. Hereinafter, the operation of this embodiment will be described with reference to FIGS. The control device 11 monitors the state of the shift lever 44 via the shift tower 45 and, when detecting that the shift lever is set to a drive other than the drive “D”, performs manual gear shifting similarly to the conventional control device 41. The control process is performed, and the speed ratio (gear position) set in the transmission unit 33 is constantly displayed on the monitor unit 14 in parallel with the control process.
However, when the control device 11 detects that the shift lever 44 is set to the drive "D" by the above-described monitoring, the control device 11 monitors the state of the contact of the automatic / manual changeover switch 13, and the contact is set to the automatic side. In the same manner as in the conventional control device 41, by referring to the shift speed selection map based on the accelerator opening obtained through the accelerator sensor 46 and the vehicle speed obtained from the vehicle speed sensor 40, the speed change is obtained from the map. It waits while giving the transmission ratio to the transmission section 33 (FIG. 2). When the contact of the automatic / manual switch 13 is set to the manual side in such a state, the following
As described above, the shift operation uses the control device 11 by the driver.
Manual. That is, the control device 11
The clutch pedal 12 has not been depressed via the activation determination means.
Is determined not to start the gear change when the
Gear selection when the clutch pedal 12 is depressed
It is determined that the shift is activated by referring to the map, and the following
Perform the process of (b).

(A) The control device 11 monitors the state of the contact of the clutch pedal sensor 12 and does not perform the gear shifting process until the contact is closed in response to the depression of the clutch pedal 42 (FIG. 2).

(B) The control device 11 depresses the clutch pedal 42 (the clutch 32
Is detected), the speed change process is performed based on the following procedure.

The control device 11 reads the vehicle speed via the vehicle speed sensor 40 when the clutch pedal 42 is depressed.
In other words, the shift speed selection map is referred to based on the accelerator opening obtained through the accelerator sensor 46 and the vehicle speed obtained from the speed sensor 40 (FIG. 2). Controller 11 obtains the rotational speed e _i of optimum engine 31 in connection of the clutch 32 according to the results obtained transmission ratio of the reference. The number of rotations and the engine 3 detected via the rotation sensor 34
The PID control according to the difference between the first rotational speed e _o via the control unit 35 starts the isochronous control applied to the engine 31. Thus, the rotational speed of the engine 31 is variably set to a value substantially match the rotation speed e _i (Fig. 2).

Furthermore, the control device 11 notifies the completion of the shift to the driver by a buzzer provided in the monitor unit 14 when the shift of the speed change unit is completed (FIG. 2
). Further, when the control device 11 monitors the contact point of the clutch pedal sensor 12 in parallel (FIG. 2) and detects that the clutch pedal 42 has recovered from the depressed state, the control device 11 stops the process of the isochronous control described above ( FIG.
), Return to normal accelerator control.

As described above, according to the present embodiment, the gear shifting timing is given by depressing the clutch pedal 42, the gear shifting is carried out promptly, and the clutch is connected / disengaged at an arbitrary timing according to the driver's will. be able to.

[0019]

[Effect of the Invention] As described above, according to the present invention, the isochronous control is performed at the timing when the clutch pedal is depressed, and the speed reduction ratio adapted to the vehicle speed and the degree of opening of the arcel is set. Rapid shifting and clutch connection / disconnection are possible.

Therefore, in the automobile to which the present invention is applied, the driving environment is improved and the performance is enhanced.

[Brief description of the drawings]

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

FIG. 2 is an operation flowchart of the embodiment.

FIG. 3 is a diagram illustrating a configuration example of a conventional automatic transmission.

FIG. 4 is a diagram showing an example of a gear position selection map.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Control apparatus 12 Clutch pedal sensor 13 Automatic / manual change-over switch 14 Monitor part 31 Engine 32 Clutch 33 Transmission part 34 Rotation sensor (RS) 35 Control device (GC) 36 Clutch actuator (CA) 37 Clutch stroke sensor (CS) 38 Gear shift Actuator (GSA) 39 Shift position sensor (SPS) 40 Vehicle speed sensor (SS) 41 Controller 42 Clutch pedal 43 Master cylinder 44 Shift lever 45 Shift tower 46 Accelerator sensor

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI F16H 59:56 (72) Inventor Satoru Hoshijin 1-chome, 1-chome, Ageo-shi, Saitama Nissan Diesel Kogyo Co., Ltd. (56) Reference Reference JP-A-4-87841 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16H 59/00-61/12 F16H 61/16-61/24 F16H 63/40-63 / 48

Claims (1)

(57) [Scope of request for utility model registration] An engine is mechanically connected to the engine via a clutch.
Gearbox that is provided in the connected transmission section and switches the transmission ratio.
Shift actuator and the clutch are provided to transfer the power between the engine and the transmission.
A clutch shift actuator for connecting / disconnecting, an accelerator sensor for detecting an accelerator opening, a vehicle speed sensor for detecting a vehicle speed, and the accelerator sensor and the vehicle speed sensor connected to an input side.
Gear shift actuator, clutch shift gear
A control device connected to the output side of the actuator, wherein the control device is configured to store a gear position corresponding to the accelerator opening and the vehicle speed in advance.
Including selection map, shift lever is drive "D"
Under the conditions set for the sensor, the accelerator sensor
Accelerator opening and vehicle speed sensor
With reference to the shift speed selection map based on the obtained vehicle speed,
The gear ratio selected by the gear selection map
In an automatic transmission that is set in a transmission unit via a shift actuator, the automatic transmission is connected to the control device and manually operated by a driver.
A manual / automatic changeover switch for performing automatic changeover, a clutch pedal , connected to the control device, and provided on the clutch pedal;
A clutch pedal sensor, wherein the control device is in a state where a manual / automatic changeover switch is set to a manual side.
, The gear shift is activated when the clutch pedal is depressed
And the clutch pedal is not depressed
Shift start determination means to determine that the shift is not started when
When the shift is started via the shift start determining means,
Determine the gear ratio by referring to the gear selection map, and
The engine speed is calculated according to the gear ratio obtained as a result.
An automatic transmission characterized by performing isochronous control .