JPS61153044A - Automatic transmission gear - Google Patents

Abstract

PURPOSE:To avoid ineffective speed change and to prevent deterioration of operability by switching from ordinary speed change control means to turning speed change control means on detecting that a car turns to control the speed change of an automatic transmission gear. CONSTITUTION:There is provided turn detection means 2 for judging release of an acceleration pedal and steering operation of a car at least and detecting turning. Further, there are provided ordinary speed change control means 3 for changing the speed of an automatic transmission gear 1 to a designated speed according to an engine load and a car velocity, and turn speed change control means 4 adapted to change the speed in a different mode from that of the above means 3. When turning of a car is detected by the turn detection means 2, the turn speed change control means 4 is selected in place of the ordinary speed change control means 3 by switch means 5, and the speed change operation of the automatic transmission gear 1 is executed by the control means 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an automatic transmission system that transmits power from an engine to drive wheels to drive a vehicle, and particularly an electronic transmission system. ! IQ! #iI-type automatic transmission 0 (Prior art) Automatic transmissions select a predetermined gear ratio by changing gears according to the vehicle speed and throttle opening and opening according to the standard pattern shown by the solid line in Fig. 7. However, in the case of an electronically controlled automatic transmission, a part of the shift line is shifted toward high vehicle speeds, for example, as shown by the dotted line in Figure 7, to suit these situations, especially when climbing or accelerating. Select and use the power pattern,
It is possible to configure the gear shift to be performed along this 7<war pattern.

In fact, the applicant of this application has already introduced this type of electronic Ml dark type automatic shifting in ``Nirasan Service Bulletin'' No. 484, published in June 1982. As described on pages 225 to 227 of the above-mentioned document, this automatic transmission operates on a 151-hill slope with the driver turning off the power shift switch to automatically switch the standard turn and power pattern. The power pattern is selectively used during driving that requires power, such as when driving or accelerating, and the standard pattern is selectively used during other normal driving. In order to return from the power pattern to the standard pattern, even if the accelerator pedal is released before a curve when pitching, a slight time lag is set in anticipation of the above-mentioned situation.

(Problem to be solved by the invention) However, with such a slight time lag, if the accelerator pedal is released before the curve while driving on a winding road with a relatively long t [Kumaji section], On the way, the power pattern switches to the standard pattern, automatically changing! The iI amplifier shifts, causing a drop in driving force, and when the accelerator pedal is pressed, the standard pattern returns to the power pattern, and the automatic transmission 1 shifts down, causing a sudden increase in driving force. , which caused problems with poor drivability.

Means for Solving Problem C) The present invention attempts to solve the above-mentioned problem by configuring an automatic transmission so that the transmission control for that point in time is continued while the vehicle is turning on a winding road or the like. , the present invention is the first
As shown in the figure, in a JT vehicle that is driven by power from one engine via an automatic transmission S machine, turning travel is performed in which at least the release of the accelerator pedal and the steering operation of the vehicle are determined to detect that the vehicle is turning. Detection means 2 and automatic change according to at least engine load and vehicle speed 8! !
a normal speed change control means 3 for changing the speed of the automatic transmission machine to a predetermined speed ratio; a swing phase change control means 4 for changing the speed of the automatic change machine in a manner that cooperates with the normal speed change control means 8; In response to a signal from the traveling detecting means 2, during cornering, the normal gear shift a control means 8 is switched to the cornering gear 1'11Ii1, and the automatic transmission is shifted by the cornering f series # control means. The present invention is characterized in that it is provided with a switching means 6 for continuously executing.

(Production #4) When the means 2 detects a turning movement, the switching means 5 switches from the normal phase change M control means 1!13 to the turning phase change M control means sound, and automatically changes M! by the latter. As long as the gear shift of Ill is carried out and the means 2 detects the turning movement, the turning phase change j! 1. Automatic gear shifting with control means! ! 11 gear changes are performed continuously.

Therefore, the means for detecting turning movement! T! A1's speed change is controlled by the turning speed change control means 4, and the speed change control is not switched to the normal speed change control means 3, and while driving on a winding road, unnecessary speed changes are performed due to the 17J shift, resulting in poor drivability. This will solve the problem of deterioration.

(Example) Hereinafter, an embodiment of the present invention will be described in detail based on FIG.

FIG. 2 is a schematic diagram showing an embodiment of the present invention, in which 10 is an electronically controlled automatic transmission, 11 is a pulp body for controlling the speed change, 12 to 18 are Siaton renoids, and 12
is 1-2 shift solenoid, ls is 2-3 shift)'/L
, /id, 14 is a 3-4 shift solenoid. In addition, the 1filQ is a 4-speed automatic transmission, and the 1←
2 gears are changed, 2-8 shifton lens 13 is turned on,
By switching OFF! - The gears are shifted in 3←→ rows by switching the 8-4 shifton lens 14 ON and OFF.1 These shift pre-lids are ON and OFF
Although the first speed to first speed are selected based on the TMi combination shown in the following table, the description of the reverse gear is omitted because it is not related to the present invention.

The shift solenoids 12 to 11 are respectively turned on to l1liA by the controller 15, and turned off to l1liA according to the driver's desired power pattern.
OFF when you want automatic pattern switching between power pattern and standard pattern.
Signal Sp from pattern switch 16 to detect engine throttle opening #lTH, signal from throttle opening sensor 17 to detect engine throttle opening #lTH, signal from vehicle speed sensor 18 to detect vehicle speed V 1 Every fixed rotation angle of the steering wheel. The signal SB from the steering angle sensor 19 that emits a pulse signal and the forward red range associated with automatic gear shifting, that is, forward automatic gear shifting driving (D
) range, 2nd super engine brake running (1) range,
A signal SR from the inhibitor switch 20 for detecting the second super engine brake running (I) range is input.

The controller 15 is constituted by a microcomputer and executes the precedent programs shown in FIGS. 8 to 5 based on the above input information to select a pattern and to perform automatic gear shifting in accordance with the selected pattern.

Fig. 8 shows the main routine, which is executed during engine operation, and first in step 30, power 7 lag POW is executed.
Check FLG. As will be described later, this power flag is set to function 1, where the power pattern is translated into III, when the driver turns off the pattern switch 16 and desires automatic switching between the standard pattern and the power pattern. , otherwise, that is, during standard pattern selection or power pattern selection with the pattern switch 16 turned on, it is reset to 0.

If it is POWFLG-0, check whether the pattern switch 16 is ON or OFF from the signal Sp in step 81, and turn the pattern switch 16 ON or OFF.
If it is FF, the throttle opening TH is read in step 82, and the vehicle speed v is read in sequence in step 8δ. In the next step 8-, the judgment criteria for pattern switching set by the combination of 1 throttle opening 9TH and vehicle speed V and the power setting throttle opening speed increasing relation TH ' dt 'Re1f
From the table data of ', the current throttle opening increase/delay 1
At Nawate step 85, it is determined whether or not the throttle opening rate is equal to or higher than the change rate of TH. If it is above, the power flag POWFLG is set to 1 at step 86, and the power pattern is set at step δ7. If the standard pattern is not higher than the standard pattern, select the standard pattern in step 3B. If it is determined in step 81 that the pattern switch 16 is turned on and a desired power pattern is desired, the power pattern is unconditionally selected by executing step 87.

If it is determined in step 80 that the power pattern is POWFLG-1, that is, if the power pattern has been automatically selected, control proceeds to step 89, where the idle flag IDLFI, G is checked. It is assumed that the idle 7 lag IDI and FLG are set to 01 or 10 when the throttle opening (support) TH is fully closed, and are returned to 00 after the set time T0 or T, as will be described later. If IDLFLG is -00, then in step 40 the sulphur open 1'fTH is read, and in the next step 41 it is determined whether this is a fully closed accelerator pedal release state. If the accelerator pedal is not released, one power pattern is continued to be selected in step 87, and if the accelerator pedal is released, the number N of steering pulses is continuously outputted in step 42.

The number N of steering pulses is determined by reading and storing the count value of a counter that counts and amplifies the pulse signal Ss from the steering angle sensor 19 (see Figure 2) using the regular interrupt routine shown in Figure S, and then executing step 4z. This count value shall be obtained by reading the time. The interrupt routine of FIG. 4 is repeatedly executed for a certain period of time ΔTs, and first, step
Check the power 7 lag POWFLG and this is 0
During standard pattern 1ltR or manual power pattern selection, after clearing the above counter in step 61, control is returned to the main routine of FIG. 8 in step 6z, and the power pattern automatic a of POWFLG-1 is
Only Sawanaka reads and stores the count value of the counter in step 68, and then controls the chip 81 and 82.
Advance s.

By the way, as shown in FIGS. 6(a) and 6(b), when Ti < when traveling in a straight line, the pulse signal Ss during the interrupt interval ΔT of the routine shown in FIG. Because the frequency of steering is high or the steering angle is large, there are many pulse signals Ss during the interrupt interval Δτ. Therefore, it is possible to determine whether the vehicle is turning or not, depending on whether the number N of steering pulses read out at step 6B in FIG. 1, ie, the number N of steering pulses read out at step %2 in FIG.

In the next step 4B in FIG. 8, it is determined whether the number of steering pulses N is greater than or equal to the set value NR, and whether the steering pulse number is 100 or less, and if not, the idle flag IDLFLG is set to 01 in step 44. After that, reset the idle tire in step 45, and if N≧NR, step 46
After setting the idle flag IDLFLG to 10 in step 17, the idle timer I is reset. Step 4
6 or shift, the control advances to step 87 to continue selecting the power pattern.

After I DLFLG becomes 01 or lO as described above, step 89 selects step 8, where the timer or I is reset.
Check whether it shows.

Note that the set time T0 is the delay time for switching from the power pattern to the standard pattern when not turning, so the time lag is saved, but the set time T□ is the delay time for switching the pattern when turning.
Set it relatively long.

In step 4B, timer←T, or timer ■←T! While determining this, the corresponding timer is incremented (stepped forward) in step 19, and then the power pattern is selected in step 37. When this happens, the idle flag IDLFLG and power flag POWFLG are reset to 00 and 0, respectively, in steps 50 and 51, and then gJ is changed to the standard pattern in step 8B.

In step 52, based on the standard pattern determined in step 1B or the power pattern selected in step 87, automatic shift 1 is controlled by executing the T control program shown in FIG. First, in the Stella 270, the speed/I/various #tTH and the vehicle speed V are continued, and in the next step 71, it is determined from the signal SR whether or not it is in the D range. Step 7 for D range
2, shifusinrenoid 12~Is ON, 0FFLy
) The current selected gear position is read from the combination, and in the next step 73, the throttle is adjusted based on the first selection pattern. 8 (in 2nd gear), V8. (3rd M! hour)
and downshift heavy speed V (at 4th gear), V8. !
Eighth! ! ! ), ■, 1 (at 2nd speed) in the table lookup.

In step 7, at 75.78, the current gear is in the gear position.
Determine whether it is 3rd M or 2nd gear, and if it is 1st gear, step 77
8] If it is 1, go to step 7B, if it is 2M, go to step 79. Husai HJ? Step M is advanced, and in the first case where the determination is No in step 76, step IvI II is advanced to step BO. In step 77, it is determined whether V≦v48 or not, and if not, in step 81, commands are given to turn ON and OFF the shift solenoids 12 to 14 so that the first speed is maintained.
If so, in step B2, turn ON the shift lens noids 12 to 1 so that a downshift to the 8th shift is performed.
, commands OFF. In step 78, it is determined whether or not V≧v84, and if so, in step 81, commands are given to turn ON and OFF the seaton renoids 12 to 14 so that upshifting is performed, and if not, in step S8 It is determined whether V≦v82. V≦v
8! If so, shift solenoids 12 to 14 (7) are ON so that a downshift to 2nd speed is performed in step 8.
OFF is commanded, and if V≦v82−c'rx, the shift-on renoid 12 is such that the sixth luck is maintained in step 82.
-14 ON and OFF commands. In step 79, it is determined whether V≧V, and if so, step B2
At step 85, the shift solenoid 12-14 is commanded to be turned on or off so that the amplifier shift to the 8th speed is performed, and if not, it is determined at step 85 whether V≦v21. If V≦v21, downshifting to the first mode is not performed in step B6, and if V≦v8, the downshifting to the second mode is also performed in step B.
M! commands to turn ON and OFF the Siaton lenoid 12 to 14 such that the current is maintained. In step 80, vav
□.

It is determined whether or not the shift lens 12~
Otherwise, in step 86, the shift solenoids 12 to 14 are commanded to be turned on and off so that the first speed is maintained.

The shift-lenoid ON and OFF commands in steps 81, 82, 84, and 86 are outputted to the corresponding shift solenoids 12 to 14 in step 87, and the automatic transmission is shifted to the state where the gear position according to the command is set to 1afR #JJa
ll T can.

Incidentally, the standard pattern and power pattern on which this shift control is based are selected as described above with reference to FIG. During turning, there is a delay in switching to the standard pattern T,
In order to make it sufficiently long, the power pattern is virtually maintained during turning, and based on this, the variable M! By continuing the control, it is possible to prevent drivability from deteriorating due to an inadvertent shift caused by pattern switching during cornering. -Next, if it is determined in step 71 that the vehicle is not in the D range, it is determined in step 8B whether or not it is in the range range from the signal Sa, and if so, in step 89 the car M4v is in the 1+1! ! Determine whether there is one or more limits glrIv that would cause engine overspeed, and if so, select 2nd speed for the engine according to step B and 87 to prevent engine overspeed1. If not, start step 8
11th due to 8.87! Fixed to. In step 8B
It is determined that it is not a microwave! When selecting a range, step 9
0, it is determined whether the vehicle speed V is above the limit 41'72M that causes engine overspeed in the second gear, and if so, in steps 82 and 87, 3i is selected Ia even in the H range, and the engine is Make sure no over-rotation occurs, otherwise fix to the second series according to steps 84.87.

In the above-mentioned embodiment, the turning detecting means is explained by taking as an example a case in which a power pattern as shown in FIG. The shift pattern may be one that uses only a specific gear stage, that is, one that prohibits shifting.

(Effects of the Invention) As described above, since the automatic transmission of the present invention is configured to continuously perform the gear shift control during turning, careless gear changes may occur during turning, which may impair drivability. It is possible to reliably prevent this from becoming scary, and it is possible to greatly increase the commercial value of automatic transmissions.

[Brief Description of the Drawings] Fig. 1 is a conceptual diagram of the automatic transmission of the present invention. Fig. 2 is a system diagram showing an embodiment of the present invention. Figs. 70-Chart of control program, Fig. 6(a),(b)
711 is a time chart showing that the steering pulses are different when traveling on a straight road and when traveling in a corner, and No. 711 is a shift pattern diagram showing a standard pattern and a high power pattern. 1... Automatic gear shift 1 2... Turning detection means 8
...Normal speed change control sub-means 1...Turning speed change 111-means 6...Switching means 10...Electronic FgJi! ! II type automatic transmission Iso 11...
・Pulp body 12...1-2 Syaton Lenoid 1B...2-8 Sifton Lenoid 14...8-4 Syaton Lenoid 1! +... Controller 16... Pattern switch 17... Throttle sensor 18... Vehicle speed sensor 19... Steering angle sensor 20... Inhibitor switch Fig. 1 Fig. 2 Fig. 6 Fig. 7 Figure 1, how to correct page 17, line 20 of the specification as follows:
Continuing amendment (method) % formula % 1. Indication of the case Patent Application No. 275282 of 1982 1. Name of the invention Automatic transmission 3. Person making the amendment Relationship to the case Patent applicant (399) Nissan Motor Co., Ltd. Represent a company.

Claims (1)

[Claims] 1. In a vehicle that is driven by power from an engine via an automatic transmission, turning detection detects whether the vehicle is turning by determining at least the release of the accelerator pedal and the steering operation of the vehicle. a normal shift control means for shifting the automatic transmission to a predetermined gear ratio according to at least the engine load and vehicle speed; and a turning means for shifting the automatic transmission in a manner different from the normal shift control means. In response to signals from the turning speed change control means and the turning movement detecting means, the normal speed change control means is switched to the turning speed change control means when turning, and the automatic transmission is controlled by the turning speed change control means. An automatic transmission characterized by being provided with a switching means for continuously operating the transmission.