JPS5997351A - Speed change control method for automatic speed change gear - Google Patents

Abstract

PURPOSE:To set a running program for an automatic speed change range according to a driver's desire or a use of a car by correcting a shift program with data storing speed changing points during running within a fixed speed change range. CONSTITUTION:In case of an automatic speed change in a basic map, a mode changing switch is set NORMAL, thereby conducting a shift up-and-down operation according to a basic shift map at the time of runing. In case of obtaining a shift map suitable to a driver's desire or a use of a car, the mode changing switch is set PROGRAM, driving is conducted within a fixed range by operating a select lever, and a memory switch is turned on to change speed at a car velocity to be memoried. When the select lever is put in a drive postion after all speed changing points are stored, automatic speed change driving can be performed in a correction map where the basic map and the memory map are composed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shift control method for an automatic transmission that can change a shift map depending on driving conditions.

Automatic transmissions are configured to detect the amount of accelerator pedal depression and vehicle speed to perform gear changes based on a shift map stored in advance by a microcomputer, and can only change gears according to the predetermined pattern. For this reason, depending on the driver's preferences and the purpose of the vehicle, the shift map may not always be appropriate. That's not to say, there are more cases of driving with a general shift map, and it is a lot of work to think about each person's preferences and use of the vehicle from the beginning and memorize the shift map for that purpose. Not only that, but the selection is also troublesome, and a situation may arise in which a suitable shift map cannot be selected.

The present invention is intended to solve these conventional drawbacks, and its purpose is to: ・Based on the basic shift map, change the shift map according to the driver's preference or the purpose of the vehicle as necessary. An object of the present invention is to provide a shift control method for an automatic transmission that can be synthesized with a shift map.

Next, embodiments of the present invention will be described in detail using the drawings.

Figure 1 shows the hydraulic control circuit for speed change operation.
is a select actuator, 2o is a shift actuator, 30 is a clutch actuator, 7 is a select lever, 8 is a transmission, V1%V4 is an on-off valve, ■6 to v8 are flow path switching valves, P is a pump, and T is a tank. , 1-5. R
, N indicate the gear position, and 0N-OFF indicates engagement and disengagement of the clutch.

Said select and shift actuators 10 and 2
0 is configured to be able to stop in 3 positions,
It consists of stepped cylinders 13 and 23, first pistons 11 and 21, and cylindrical second pistons 12 and 22 that engage with the first pistons, and the rods 11a and 21a of the first pistons are It is engaged with an internal lever of a transmission (not shown). Both actuators 10 and 20 are in the neutral state shown when hydraulic pressure is applied to both chambers 13a, 13b and 23a, 23b of stepped cylinders 13 and 23, respectively, and when hydraulic pressure is applied to chambers 13a and 25a, respectively, the actuators 10 and 20 are in the neutral state shown in FIG. The pistons 11 and 21 move to the right in the figure together with the second pistons 12 and 22, and when hydraulic pressure is applied to the chambers 13b and 25b, respectively, only the first pistons 11 and 21 move to the left in the figure. It is supposed to move.

Said select actuator 100 chambers i3a and 13
b communicates with the pump P (via the on-off valve V1) or the tank T via flow path switching valves V5 and 6, respectively.

The shift actuator 20 also has chambers 23a and 23b.
communicates with the pump P (via the on-off valve v1) or the tank T via flow path switching valves v7 and v8, respectively.

The clutch actuator 30 consists of a cylinder 33, a piston 61, and a piston rod 31a that is connected at one end to the piston 31 and at the other end to an operating lever of a clutch (not shown), and the chamber 36a is connected to a pump via an on-off valve Vs+. In addition to communicating with P (via on-off valve ■1),
It communicates with the tank T via an on-off valve v8 and a pulse-controlled on-off valve V4. Note that the chamber 33b is piped so as to always communicate with the tank T side.

Reference numeral 50 denotes an electronic control unit composed of a microcomputer, which includes a position sensor 01 for detecting the operating position of the clutch actuator 30, an accelerator sensor 02.8M sensor 06 for detecting the operating position of the accelerator pedal, a 2/Jin rotation sensor 04, Engine coolant temperature sensor 05, gear position sensor 06 that detects the gear position of the transmission, select lever position switch fQ
7, etc., the on-off valves V1 to V
4 and flow path switching valves η to 8.

FIG. 2 is a basic shift map, which is stored in advance in the electronic control device at the time of vehicle manufacture, and shows the automatic shift range. FIG. 6 shows a memory map selected according to the driver's preference and the purpose of the vehicle. Figure 4 is the second
This is a modified map that combines the memory map shown in Figure 6 with the basic shift map shown in the figure. In the figure, solid lines indicate upshifts, broken lines indicate downshifts, and III...
. . . indicates each gear range. An automatic transmission is an electronic automatic transmission that has an electronic control unit consisting of a microcomputer, and the electronic control unit stores an automatic shift range (D) that can be selected by a select lever, a fixed shift range, etc. The operating means for the automatic transmission include a select lever for selecting the automatic transmission range (D) or a fixed transmission range, and a shift map suitable for the driver's preference or the purpose of the vehicle to be stored in the electronic control unit. memory switch and select one of several basic shift maps to drive the vehicle (normal) or driver-created shift map (program).
A mode changeover switch is provided for selecting whether to perform the following.

Next, the operation of the above embodiment will be explained. In the case of automatic gear shifting based on the basic shift map, the mode selector switch is set to NORMAL, so that upshifts and downshifts are performed according to the basic shift map during driving. When you want to obtain a shift map that suits the driver's preferences and the purpose of the vehicle, first set the mode selector switch to "PROGRAM".Next, operate the select lever to operate in the fixed range, and then,
While the memory switch is turned on, the vehicle speed changes according to the memory stored in the electronic control unit. At this time, the electronic control unit memorizes the vehicle speed and creates the memory map shown in Figure 6. After all shift points have been memorized, when the select lever is moved to the drive position, the modified map shown in Fig. 4 is created by combining the basic map shown in Fig. 2 and the memory map shown in Fig. 3. Automatically variable speed operation is possible.

In this case, if the four up and down lines shown in the memory map of FIG. 6 are not stored in memory, the electronic control unit 50 processes as follows.

B. By programming eight basic memory map data into the electronic control unit, the basic data will be reset each time the battery is connected.

Before setting, store basic data in the memory map.

C. If there is not enough memory gator, calculate the missing data from the basic data and memory data and create the memory map shown in Figure 3.

As described above in detail, the present invention incorporates an automatic shift range, a fixed shift range, etc. that can be selected by a select lever in an electronic control device of an electronically controlled automatic transmission, and also includes a mode changeover switch in the electronic control device. This makes it possible to program the fixed shift range, and when the memory switch is turned on, an appropriate shift map can be stored in memory, and when the memory switch is turned on, the shift points during operation using the fixed shift range are memorized. Using this data, the driving program of the automatic shift range can be changed to the driver's preference by applying 1 pressure to all Ll of one shift program selected from the shift programs built into the electronic control device. ,
Since it can be changed according to the purpose of the vehicle, it is possible to only automatically change the gear according to the basic shift map of (1 shoe force). An optimal shift map can be obtained accordingly.

[Brief explanation of the drawing]

1 is a hydraulic control circuit diagram for operating a transmission, FIG. 2 is a basic map, FIG. 3 is a memory map according to the present invention, and FIG. 4 is a modified map that is a combination of FIG. 2 and FIG. 3. 7...Select lever, 8...Transmission, 10...Select actuator, 20...
---Shift actuator, 50...Electronic control unit, 07...Select lever position switch Applicant: Isuy Automobile Co., Ltd.

Claims (1)

[Claims] The electronic control device of the electronically controlled automatic transmission is equipped with an automatic shift range and a fixed shift range, etc., which can be selected by a select lever. Furthermore, by turning on the memory switch, an appropriate shift map can be stored in memory, and when the memory switch is turned on, the shift points during operation using the fixed shift range are memorized, and the data is used to control the electronic control device. To enable a driving program in an automatic transmission range to be changed in accordance with the driver's preference and the purpose of the vehicle by modifying all or part of one shift program selected from shift programs built into the vehicle. A speed change control method for an automatic transmission characterized by: