JP4629239B2 - Neutral control device for automatic transmission - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a neutral control device in an automatic transmission in which a manual transmission is automatically shifted by an actuator and the actuator is neutrally controlled when a neutral request is issued from a driver.
[0002]
[Prior art]
A conventional manual transmission (MT) is generally equipped with a synchro mechanism in each gear. This synchro mechanism is often symmetrical in structure, and its central position is generally neutral with respect to synchro.
[0003]
The above-described conventional manual transmission holds neutral by a link control system directly connected to a lever operated by a driver, whereas a conventional automatic transmission that performs automatic shift by mounting an actuator is controllable. The neutral was generated, that is, the neutral was retained.
[0004]
[Problems to be solved by the invention]
In the above-described conventional automatic transmission, the neutral range is generally a very narrow range of 1 mm or less in the worst state. Considering accuracy, there was a problem that it was very difficult.
[0005]
For example, when held slightly in sync with the synchro and kept in sync with the synchro, the clutch is engaged and the engine is blown. It was.
[0006]
Therefore, the present inventor has focused on reverse (Rev), and in manual transmissions, since reverse generally does not have a synchronization mechanism, it has focused on the fact that the neutral range is wide, so that it is easy to maintain neutral. .
[0007]
In the automatic transmission that automatically shifts the manual transmission with an actuator based on the above-mentioned attention, the inventor is a region closer to the reverse than the neutral position of the reverse and the fifth-speed gate when a neutral request is issued from the driver. As a result of further research and development focusing on the technical idea of the present invention to be controlled so as to be positioned in the position, the neutral holding control is facilitated and the wear of the synchro is prevented and the life is extended. The present invention has been achieved.
[0008]
[Means for Solving the Problems]
A neutral control device in an automatic transmission according to the present invention (first invention described in claim 1) is:
In an automatic transmission that automatically shifts a manual transmission using an actuator,
When a neutral request is issued from the driver, the actuator is controlled so as to be positioned in a region closer to the reverse than the neutral position of the reverse and fifth gear gates.
[0009]
Neutral control device of the automatic transmission of the present invention (first invention described in claim 1),
Gear to achieve the reverse rotation of the front Symbol reverse is one that is not equipped with a synchronizing mechanism.
[0010]
Neutral control device of the automatic transmission of the present invention (second invention described in claim 2),
In the first invention,
When a neutral request is issued from the driver, if the vehicle speed is 0 km / h, the actuator is controlled so as to be positioned in a region closer to the reverse than the neutral position of the reverse and 5-speed gates.
[0011]
A neutral control device for an automatic transmission according to the present invention (the third invention according to claim 3 ),
In the second invention,
When the vehicle speed is not 0 km / h, the clutch is controlled to be disengaged.
[0012]
The neutral control device in the automatic transmission according to the present invention (the fourth invention according to claim 4 ) is:
In the third invention,
When the vehicle speed is 0 km / h, it is confirmed whether the brake or the parking brake is on.
[0013]
A neutral control device in an automatic transmission according to the present invention (the fifth invention according to claim 5 ),
In the fourth invention,
When the brake or the parking brake is on, the actuator is controlled so as to be located in a region closer to the reverse than the neutral position of the reverse and fifth-speed gate after the first fixed time has elapsed. is there.
[0014]
Neutral control device of the automatic transmission of the present invention (sixth invention described in claim 6),
In the fourth invention,
When the brake or the parking brake is not turned on, the actuator is located in a region closer to the reverse than the neutral position of the reverse and fifth gear gates after a second fixed time longer than the first fixed time has elapsed. To be controlled.
[0015]
Operation and effect of the invention
The neutral control device for an automatic transmission according to the first aspect of the present invention is an automatic transmission for automatically shifting a manual transmission with an actuator. When a neutral request is issued from a driver, the actuator is operated with a reverse and a 5-speed gate. Since the control is performed so as to be located in a region closer to the reverse side than the neutral position, an effect of facilitating the neutral holding control is obtained.
[0016]
Neutral control device in the automatic transmission of the first invention having the above construction, the gear for implementing the reverse rotation of the front Symbol reverse is, because not provided with a synchromesh mechanism, because wide neutral range, easily neutral holding control In addition, there is an effect that the wear of the synchro is prevented and the life is extended.
[0017]
The neutral control device for an automatic transmission according to the second aspect of the present invention having the above-described configuration is the first aspect of the present invention, wherein when the vehicle speed is 0 km / h when the neutral request is issued from the driver, Since the control is performed so as to be located in a region closer to the reverse side than the neutral position, it is possible to prevent the actuator from being controlled to the neutral position while the vehicle is traveling.
[0018]
In the neutral control device for an automatic transmission according to the third aspect of the present invention having the above structure, in the second aspect of the invention, when the vehicle speed is not 0 km / h, the clutch is controlled to be disengaged. There is an effect that.
[0019]
In the neutral control device in the automatic transmission of the fourth invention having the above-described configuration, in the third invention, when the vehicle speed is 0 km / h, it is confirmed whether the brake or the parking brake is on. Since the start of the vehicle is determined, there is an effect that it is possible to cope with the start of the vehicle.
[0020]
In the neutral control device for an automatic transmission according to the fifth aspect of the present invention having the above-described configuration, in the fourth aspect , when the brake or the parking brake is on, the actuator is Since it is controlled to be located in a region closer to the reverse side than the neutral position of the reverse and 5th speed gates, there is an effect that it is possible to promptly respond to the driver's neutral request when there is no possibility of starting the vehicle.
[0021]
The neutral control device for an automatic transmission according to the sixth aspect of the present invention having the above-described structure is the second constant time longer than the first constant time when the brake or the parking brake is not turned on in the fourth invention. After the time elapses, the actuator is controlled so as to be located in a region closer to the reverse than the neutral position of the reverse and 5th speed gates, so that the actuator remains in the normal neutral state until the second fixed time elapses. Since the position is controlled, it is possible to eliminate the uncomfortable feeling caused by the delay in responding to the start of the vehicle.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0023]
(Embodiment)
As shown in FIGS. 1 to 4, the neutral control device for an automatic transmission according to the present embodiment is configured so that when a neutral request is issued from a driver in an automatic transmission 2 that automatically shifts the manual transmission 1 by an actuator, The actuators 42 and 43 are controlled so as to be positioned in the NR region closer to the reverse position for the reverse gear that does not have the synchronization mechanism than the neutral position of the reverse and fifth gear gates.
[0024]
The automatic transmission 2 in this embodiment is intended for the manual transmission 1 that changes the rotation of the input shaft connected to the output shaft of the engine (or motor) 3 with a plurality of gears and outputs the rotation from the output shaft. .
[0025]
The automatic transmission 2 according to the present embodiment includes a clutch actuator 41 that controls the clutch of the manual transmission 1 described above, a shift actuator 42 that controls a shift shift operation, and a select actuator 43 that controls a select operation. ing.
[0026]
The actuator includes a mechanism for automatically operating the structure of a conventional MT and clutch, and a power source thereof, regardless of hydraulic pressure, pneumatic pressure, or electricity (such as a motor).
[0027]
Further, the automatic transmission 2 in the present embodiment includes an ECU that is a control device 5 that controls the clutch actuator 41, the shift actuator 42, and the select actuator 43.
[0028]
The control device 5 includes a clutch sensor 61 that detects a clutch position or load, a shift sensor 62 that detects a shift position or load, a select sensor 63 that detects a select position or load, and the manual transmission 1. An input shaft sensor 64 for detecting the rotational speed of the input shaft, an output shaft sensor 65 for detecting the rotational speed of the output shaft of the manual transmission 1, a sensor capable of recognizing the will of the driver, and a shift lever sensor as switches 66, a steering switch, an accelerator pedal sensor 67, and a brake pedal sensor are connected, and a control signal is output to the actuator based on information from the sensor.
[0029]
A neutral control procedure in the automatic transmission of the present embodiment having the above-described configuration will be described below with reference to FIGS.
[0030]
In step 201, it is determined whether the driver's request is neutral N. If the driver's request is determined to be neutral N, it is determined in step 202 whether the vehicle speed is 0 km / h. That is, it is determined whether the vehicle is stopped.
[0031]
If it is determined that the vehicle speed is 0 km / h, it is determined in step 203 whether the brake is on or the parking brake (PKR) is on.
[0032]
If it is determined that the brake is turned on or the parking brake (PKR) is turned on, it is determined in step 204 whether or not 1 to 2 seconds, which is the first predetermined time t1, has elapsed continuously.
[0033]
If it is determined that the first constant time t1 of 1 to 2 seconds has elapsed, the reverse position for the reverse gear that does not have a synchronization mechanism from the neutral position of the reverse and fifth gear gate in step 205. It is controlled to be located in the NR region shown in FIG.
[0034]
If it is determined in step 203 that the brake or the parking brake (PKR) is not on, it is determined that the driver is willing to start, and at a second fixed time t2 that is longer than the first fixed time t1. It is determined whether a certain 5 to 10 seconds have elapsed.
[0035]
If it is determined that the second constant time t2 has elapsed, control is performed so that the second fixed time t2 is located in the NR region shown in FIG.
[0036]
If it is determined that the second predetermined time t2 has not elapsed continuously, control is performed in step 207 so as to be located in a region NE other than the NR region shown in FIG.
[0037]
If the driver's request is not determined to be neutral N in step 201, a shift position as requested by the driver is instructed in step 208.
[0038]
If it is determined in step 202 that the vehicle speed is not 0 km / h, that is, the vehicle is traveling, the process proceeds to step 300 regarding control during traveling.
[0039]
That is, if it is determined that the vehicle is running, the clutch actuator 41 disengages the clutch torque in step 300 as shown in FIG. That is, the shift is maintained as it is, and the gear is maintained in the meshed state.
[0040]
The neutral control device in the automatic transmission of the present embodiment determines whether the vehicle speed is 0 km / h when a neutral request is issued from the driver.
[0041]
When the vehicle speed is 0, it is confirmed whether the brake or the parking brake is turned on, and when the brake or the parking brake is turned on, the actuator is Control is performed so as to be positioned in the NR region shown in FIG. 4 closer to the reverse side than the neutral position of the reverse and 5-speed gates.
[0042]
When the brake or the parking brake is not turned on, the actuator is controlled so as to be located in the NR region shown in FIG. 4 after a second fixed time longer than the first fixed time has elapsed. .
[0043]
If the vehicle speed of the vehicle is not determined to be 0 km / h, that is, if it is determined that the vehicle is traveling, the clutch is disengaged and transmission of engine torque is prevented. That is, the shift is maintained as it is, and the gear is maintained in the meshed state.
[0044]
The neutral control device in the automatic transmission according to the present embodiment is controlled so that the actuators 42 and 43 are positioned in a region closer to the reverse than the neutral position of the reverse and fifth gear gates when a neutral request is issued from the driver. Therefore, there is an effect that the neutral holding control can be easily performed regardless of whether the vehicle is stopped or traveling without modifying or changing the design of the manual transmission.
[0045]
Further, the neutral control device in the automatic transmission according to the present embodiment has a reverse gear that realizes the reverse reverse rotation, and since the neutral mechanism is wide, the neutral range is wide. It has the effect of preventing wear of the synchro and extending the life.
[0046]
Furthermore, the neutral control device in the automatic transmission according to the present embodiment is controlled so that the actuators 42 and 43 are positioned in the region NR when the vehicle speed is 0 km / h when a neutral request is issued from the driver. There is an effect that it is avoided that the actuators 42 and 43 are controlled to the neutral position while the vehicle is running. That is, when the vehicle is stopped as described above, it is related to automatic shift and is not limited to full automatic.
[0047]
Further, the neutral control device in the automatic transmission according to the present embodiment is controlled so that the clutch is disengaged when the vehicle speed is not 0 km / h, that is, when the vehicle is running, so that transmission of engine torque is prevented. The shift is maintained as it is, and the gear is maintained in the meshed state.
[0048]
That is, when the shift is removed due to the driver's neutral N request during driving as in the prior art, and the shift shift requested by the subsequent shift request is performed, the amount of work for synchronization becomes large, which is disadvantageous for the synchronization life. Therefore, if the input rotation side is engaged with the clutch by holding neutral, the engine rotation will decrease in time series due to the oil stirring resistance of MT if it is not engaged, and the output rotation side will be adjusted to the vehicle speed. It becomes the number of rotations according. Relative rotation is generally large, and the amount of work required for synchronization is large in order to synchronize input / output rotation.
[0049]
Originally, since the present embodiment is a control method and apparatus for a neutral N request of a driver, the fact that the driver request can be satisfied when the vehicle is in a neutral state is used.
[0050]
Therefore, in the present embodiment, by devising a control method and apparatus for disengaging the clutch without removing the shift (gear) as described above, it is possible to perform synchro protection while satisfying the driver's neutral requirements, and to achieve neutral. The response time for performing the next shift operation from N can be reduced, and the time for performing the shift is also unnecessary.
[0051]
Furthermore, when the vehicle speed is 0 km / h, the neutral control device in the automatic transmission according to the present embodiment determines whether the brake or the parking brake is on, so the driver's intention to start the vehicle is determined. Therefore, there is an effect that it is possible to cope with the start of the vehicle.
[0052]
Further, in the neutral control device in the automatic transmission according to the present embodiment, when the brake or the parking brake is on, the actuators 42 and 43 are connected to the reverse and fifth speed gates after the first constant time t1 has elapsed. 4 is controlled so as to be positioned in the region NR shown in FIG. 4, so that it is possible to promptly respond to the driver's neutral request when there is no possibility of starting the vehicle.
[0053]
Further, in the neutral control device in the automatic transmission according to the present embodiment, when the brake or the parking brake is not turned on, after the second constant time t2 longer than the first constant time t1 has elapsed, the actuator 42 and 43 are controlled so as to be located in the region NR closer to the reverse position than the neutral position shown in FIG. 4, so that it is possible to reliably respond to the driver's neutral request when there is no possibility of starting the vehicle. There is an effect.
[0054]
In the embodiment, when the brake or the parking brake is not turned on and the second predetermined time t2 has not elapsed, the actuators 42 and 43 are controlled to the normal neutral position region NE. As a result, it is possible to eliminate the uncomfortable feeling caused by the delay in responding to the start of the vehicle.
[0055]
That is, the actuators 42 and 43 are held in the region NR near the reverse position shown in FIG. 4 in response to a neutral request by the driver's neutral switch or the like. However, considering the next start from the position of the region NR, it is assumed that the vehicle is stopped, so the next driving mode can only start or stop the engine, resulting in a response delay and driver dissatisfaction. There is also. Therefore, in the present embodiment, by adding the monitoring of the brake state, which is the above-described constant condition, the region NE and the region NR are selectively used, so that it is possible to eliminate a sense of incongruity.
[0056]
As described above, the device according to the present embodiment controls (1) the control to be held in the area NR shown in FIG. 4 before the Rev without synchronization attached to the neutral request while the vehicle is stopped. 4. Control for switching the region NR or region NE shown in FIG. 4 by monitoring the brake state (3) In response to a neutral request during vehicle travel, pseudo-neutral is achieved by disengaging the clutch without releasing the shift (gear). It has control features that satisfy the requirements.
The above (1) or (2) can be applied to an automatic shift and a fully automatic system, and the above (3) is applied to a fully automatic system.
[0057]
The above-described embodiments have been illustrated for the purpose of explanation, and the present invention is not limited thereto. Those skilled in the art will recognize from the claims, the detailed description of the invention, and the description of the drawings. Modifications and additions can be made without departing from the technical idea of the present invention.
[0058]
The actuator can use a mechanism for automatically operating the structure of a conventional manual transmission (MT) or clutch, and its power source, regardless of hydraulic pressure, pneumatic pressure, or electricity (such as a motor).
[Brief description of the drawings]
FIG. 1 is a block diagram showing an automatic transmission according to an embodiment of the present invention.
FIG. 2 is a chart showing a control procedure of neutral control during stop in the automatic transmission according to the present embodiment.
FIG. 3 is a chart showing a control procedure of neutral control during traveling in the automatic transmission according to the present embodiment.
FIG. 4 is an explanatory diagram for explaining a neutral region in the present embodiment.
[Explanation of symbols]
1 Manual transmission 1
2 Automatic transmission 42, 43 Actuator 64, 65 Sensor NR area

Claims (6)

In an automatic transmission that automatically shifts a manual transmission using an actuator,
When a neutral request is issued from the driver, the actuator is controlled so as to be located in a region closer to the reverse than the neutral position of the reverse and 5-speed gates ,
The neutral control device for an automatic transmission, wherein the gear that realizes reverse reverse rotation does not include a synchronization mechanism . In claim 1 ,
When a neutral request is issued from a driver, if the vehicle speed is 0 km / h, the actuator is controlled so as to be positioned in a region closer to the reverse than the neutral position of the reverse and 5-speed gates. Neutral control device. In claim 2 ,
A neutral control device in an automatic transmission, wherein the clutch is controlled to be disengaged when the vehicle speed is not 0 km / h. In claim 3 ,
When the vehicle speed is 0 km / h, it is confirmed whether or not a brake or a parking brake is on. In claim 4 ,
When the brake or the parking brake is on, the actuator is controlled so that it is located in a region closer to the reverse than the neutral position of the reverse and 5-speed gates after the first fixed time has elapsed. A neutral control device for an automatic transmission. In claim 4 ,
When the brake or the parking brake is not turned on, the actuator is located in a region closer to the reverse than the neutral position of the reverse and fifth gear gates after a second fixed time longer than the first fixed time has elapsed. And a neutral control device for an automatic transmission.

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