JPS58160658A - Method of controlling speed shifting operation of electronically-controlled automatic transmission for vehicle - Google Patents

Abstract

PURPOSE:To reduce an uncomfortable engagement shock which occurs when a gearshift is changed from the neutral position to the drive position, by first setting the gears of an automatic transmission for second or third when the gearshift is operated from the neutral position to the drive position at the time of starting of a vehicle. CONSTITUTION:In a step 1, it is judged whether the speed of a vehicle is zero. When the speed is judged as zero, it is judged in a step 2 whether the degree of opening of a throttle valve corresponds to idling. When the degree of opening is judged as corresponding to idling, it is judged in a step 3 whether shifting from the neutral position to the drive position has been effected. If the shifting is judged as having been effected, a step 5 is taken. In the step 5, an automatic transmission is set for third. After that, the step 1 is taken again. In a step 4, the automatic transmission is set for first. After that, normal control is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronically controlled automatic transmission for a vehicle, and more particularly to a control method for changing the shift position from a neutral state to a drive state and relieving lock-up locks in the 9-position state. It is.

Conventionally, when an automatic transmission shifts 1 IKV from a neutral state in a droopy manner, the torque fluctuation at the time of engagement is 1 when the automatic transmission is in the 1st gear position with the largest gear ratio. An unpleasant locking seek was occurring, which was amplified by the higher gear ratios.

Normally, a method is used to alleviate the tsuta by using a cod plate or an akie flake, which are part of the device for engagement, but such a method There was a II-hX while the capacity of the Kusshi invasion plate and the Akim V-Y had to be increased.

The present invention has been made in light of the above, and the present invention provides a control method for an electronically controlled automatic transmission that can alleviate the locking V and the trouble caused by shifting from the second neat full position to the drive position by a very simple means. It is a turtle whose purpose is to.

Hereinafter, a bird-shaped embodiment of the present invention will be explained in detail with reference to FIG. [fi].

11i1 is a schematic diagram of an electronically controlled automatic transmission.

However, since this is already known, it will be briefly explained here.

The rotation of the engine 1 is transmitted to the planetary change gear shaft 3 via a torque comparator I2 including a lock-up clutch 2m, and the speed is changed at a predetermined rotation ratio, and then the vehicle speed sensor 4
Yosso Orj! The J rotation speed is detected and transmitted to the drive wheels 6 via the differential gear 5. The speed change of the planetary gear unit 3 is performed by the hydraulic pressure controlled by the solenoid valve 7 and the servo mechanism 8, and the operation of the lock-up clutch 2JL of the torque converter 2 is controlled by the solenoid valve 7. Note that, in this example, automatic speed change** is structured mainly using the torque converter 2 and the planetary gear unit 3.

The control of the solenoid valve 7 is carried out by the micro combiator ECU, and this microcombi 1-) ECUK is the suit for extruding fft. A lockout signal from the vehicle speed sensor 9, a detection signal from the vehicle speed sensor 4, and a signal from the lift position sensor 10 for detecting the shift position of the shift lever are input. Note that signals from a knock sensor, an engine water temperature sensor, an altitude sensor, a pattern select switch, a brake sensor, etc. are input to the microcomputer FJCU at 111, but these signals are not shown in the figure.

In this O-denshi III Oshiki automatic Hiryo machine, the signal from the throttle position scene sensor 9 which detects throttle opening and the signal from the vehicle speed sensor 4 Q- which detects the vehicle speed are input to the mankle computer ECU. When the microcomputer determines the gear position according to the gear shift line preset in the miter combinator ΣCU, it sends a signal to the solenoid valve 7 to select the gear position.

Now, this kind of control is performed in the electronically controlled automatic Hi-Ryo shooting system, but in this example control, in addition to the above-mentioned IJ II K, a shift position scene sensor 10 is used to detect the shift position. A new control method has been set in which when the detection signal from ICUK is input to the microcomputer ICUK and the shift position is changed from the neutral position to the drive position, the moss planetary gear unit 3 first shifts to 2nd or 3rd gear. There is.

This will be explained based on FIG. 2. 1. In normal control, when the shift position is completely shifted to the neutral position, the shift position sensor 10 detects the microphone-comviator ECU and starts the routine shown in FIG.

That is, in step 1, it is determined whether the vehicle speed is zero based on the signal from the vehicle speed sensor 4, and whether the throttle is open or idling (fully closed) is determined based on the signal from the vehicle speed sensor 4. Go to step 4), Yes
If so, move on to step 3. At step 3, the shift position is set to 2' by the signal from the shift position ν sensor 1o.
A determination is made as to whether the shift has been made from the etral position to the drive position, and if NO, the process returns to step 1.
), if Yes, move to step 5. Step 5
Then, the planetary gear unit 3 is turned off three times, and then the process returns to step 1.jF, 11 mB In step 4, the planetary gear unit 3 is turned off once, and then normal control is started.

In this way, when the engine is idling and the car is stopped, when the V engine is moved from neutral to drive position, the gear of the gear unit 3 is selected from 2nd speed to 3rd speed without any problem. If controlled in this way, it is possible to minimize the engagement V-shape during shifting.

□Then, when you press the throttle to start the car, the throttle position sensor 91 detects this, which causes the planetary gear unit 30 to return to 1st gear. From this, it is possible to start the vehicle without feeling any engagement of the gear shift V1 due to the control according to the normal control.

This shows the control method when the planetary gear unit is set to 2nd gear at the 9th position when the neutral V) is shifted to the 311th neutral position. Since this method is the same as the water tank control method shown in FIG. 2, its explanation will be omitted.

That is, in the present invention, when the car i11 is in ZA and the throttle opening is zero, when the shift lever is operated from the neutral force to the drive position, the smart gear of the automatic transmission mechanism is first changed to 2nd or 3rd gear. By using the speed change control method of the electronically controlled automatic smart rail for vehicles that can be turned, it is possible to alleviate the unpleasant surface engagement Vw and y when shifting from the neat full drive position WIKV, and also to reduce the Vw and tsuku changes like the conventional one. It has an excellent feature in that it eliminates the need for Zeng's large-capacity Risshi font (V-) and Aki-o-mulator.

Note that not only the case of shifting the shift lever from the neutral to the drive position, but also the case of shifting the shift lever from the 21-toral to the low range etc. belong to the scope of this technology.

Page 111 shows an example embodying the present invention.
1st m is an explanatory diagram showing the configuration of an electronically controlled automatic transmission, 2nd #A is an explanatory diagram showing a flowchart of the control method of this example,
3a1 is an explanatory diagram showing a flowchart of the control method of this example.

2 - Torque converter 5 signals planetary gear unit 4 - Vehicle speed sensor 7 - Solenoid F valve 9 - Throttle position sensor I Ruhito Patent Attorney Oka 1) Hidehiko Figure 1 Figure 3

Claims (1)

[Claims] The automatic transmission mechanism, which mainly consists of a torque converter and a planetary gear unit, is shifted to the shift position # of 1/bar.
An electronically controlled automatic for vehicles that controls speed changes using a solenoid valve controlled by a micro combinator that inputs various conditions such as speed and throttle opening! In this method of controlling the speed change of a transmission, when the vehicle speed is zero and the throttle opening is zero, when the IK shift lever is operated from the neutral to the drive position RK, the shift of the automatic smart shift mechanism is negative. A speed change control method for an electronically controlled automatic transmission for a vehicle, characterized in that a gear is first set to second or third speed.