JPS5997352A - Optimum speed change step detector for speed change gear - Google Patents

Abstract

PURPOSE:To attain a good feeling by disposing a signal circuit for closing an enalog gate connected with a speed change gear actuator driving circuit when the displacement of an acceleration pedal is larger than a fixed value to conduct speed change control according to return and step. CONSTITUTION:When a foot is detached from an acceleration pedal to jam on engine brake, an output of a sensor 02 is 0, which is sent to an analog gate circuit 45 through AND circuits 411, 412 to close a gate, thereby stopping a signal from a speed change step deciding circuit 44 to a speed change gear actuator driving circuit 46. The displacement in case of detaching the foot from the pedal is found by an arithmetic circuit 47, and if the value is larger than P2, an output of a comparison portion 48 is sent to a flip-flop 492 which outputs ''0'' to close the gate 45, thereby stopping a speed change gear. In case of working the pedal, the displacement is compared with P1, and if it is larger than P1, the same operation is conducted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optimum gear position detection system for a transmission which determines the gear position by taking into consideration the movements of the accelerator pedal when it is depressed and when it is released.

In vehicles equipped with an automatic transmission, the maximum
i The gear position is detected and the gear change operation is performed automatically, but
When coasting, in other words, when trying to apply engine braking, the driver shifted up without taking his foot off the accelerator pedal, resulting in a lack of power during coasting, and a delay in acceleration after coasting. Ta.

To this end, a system was first developed which inhibits upshifting based on the brake pressure signal and the signal indicating the return state of the accelerator pedal, and releases the inhibition by releasing the brake once. However, with only the control based on this preliminary phase, if the pedal is operated slowly, an upshift will be detected during the pedal depression process before the accelerator pedal depression amount signal reaches zero, and the shift up of the transmission will not be possible. It becomes something that cannot be avoided.

Therefore, it is possible to set logic that stops optimal gear detection when the amount of change in the accelerator pedal depression amount signal is large, and prohibits shifting even when the accelerator pedal is being released. If the comparison value of the amount of change in the accelerator pedal depression is set small enough to prevent this, when the accelerator pedal is returned by the spring, the length of the change will be very small compared to the speed at which the accelerator pedal is depressed due to the hysteresis of the spring. Since it is slow, the response during kickdown will be delayed. This response delay does not make the 9-wheel feeling that bad as long as engine braking is not applied during upshifts, but it seriously impairs the feeling during kickdowns.

The present invention is an attempt to solve such conventional problems.The purpose of the present invention is to provide a speed-shifting system that controls gear shifting in response to the movement of the accelerator pedal when the accelerator pedal is released and when the accelerator pedal is kicked down. The present invention will be specifically described below based on the illustrated embodiments.
I do it.

Figure 1 shows the hydraulic control circuit for speed change operation.
is a select actuator, 20 is a shift actuator, 30 is a clutch actuator, ■1 to ■4 are on-off valves, ■5 to ■8 are flow path switching valves, P is a pump, T is a tank, 1 to s, R ,,N indicates gear position, O
N, -0FI'' represents engagement and disengagement of the clutch.

Said select and shift actuators 10 and 2
0 is configured to be able to stop at position 6,
It consists of step cylinders 13 and 26, first pistons 11 and 21, and cylindrical second pistons 12 and 22 that fit with the first pistons, the rod 11a of the first piston, and 21a is engaged with an internal lever of a transmission (not shown). Both the actuators 10 and 20 are in the neutral state shown when hydraulic pressure is applied to each of the stepped cylinders 13 and 25, g13a, 13b and 23a, 23b, respectively, and the respective chambers 13a
When hydraulic pressure acts on the pistons 11 and 25a, the first pistons 11 and 21 move to the right in the figure together with the second pistons 12 and 22, and the respective multi-chambers 13b and 23b
When hydraulic pressure is applied to , only the pistons 11 and 21 of a(1) move to the left in the figure.

The chambers 13a and 13 of the select actuator 10
b is the pump P via the vIL path switching valves ■5 and ■6.
(I]1jIy-i via valve 1) or to the tank T, respectively.

The soft actuator 20 also has chambers 23a and 23b.
is the pump P (Iji) via the flow path switching valves v7 and V8.
j via the closed valve v1) or to the tank T, respectively.

The front six clutch actuator 30 has a cylinder 66,
A piston 61, one end connected to the piston '51 and the other end 1
．． ; is connected to the piston rod 31a connected to the actuating lever of the clutch (not shown), and the chamber 5Sa and the old J'1
It communicates with the pump P (via the on-off valve V1) via the square 2, and communicates with the Kunku TK via the on-off valve v3 and the valve V4 controlled by the pulse flIIJ.

Note that the chamber 33b is piped so as to always communicate with the tank T side.

50 is generated from the microcomputer) 11;ν can be generated'
[D + tilJ control device i1 to detect the operating position of the clutch actuator 30 + mt sensor 01, accelerator) Accelerator sensor o to detect the operating position of the v pedal 2.4''-4 sensor 06, engine Rotation sensor 04, engine coolant temperature sensor 05, gear position sensor 06 that detects the gear position of the transmission
, based on input signals from brake sensor 07, etc.
Said 13 old 11 valves Vl-V4 and flow path switching valves v5~■
Control 8.

The second section is a block diagram for controlling the accelerator pedal return and kickdown in the speed change operation circuit having the configuration shown in FIG. 1, and the same members as in FIG. 1 are designated by the same reference numerals. In the figure, 03 is a vehicle speed sensor that does not output an output signal corresponding to the vehicle speed, 02 is an accelerator pedal sensor that outputs an output signal that corresponds to the amount of accelerator pedal depression or throttle opening, and 07 is a brake that detects whether the brake is activated or not. The sensor 44 inputs the output signal of the accelerator pedal sensor 02 and the output signal of the vehicle speed sensor 03, and an automatic range gear stage determination circuit 145 determines the gear shift in the automatic range according to the function of the accelerator pedal depression and short series. E
When the /1 level) L/(1) signal is input to (Enable), an analog gate circuit that transmits the output of the automatic range gear stage determination circuit 44 to the gear shift 1 actuator 1 (driver circuit 46); Gear shift 1 actuator j,
! (The gear shift gear 46 is activated by the signal from the automatic range gear change gear determination circuit 5゛1゛♀45, 1b1.) When both parts are operated, the corresponding actuator is activated and the gear is changed. 47 is an arithmetic circuit for calculating the amount of depression of the accelerator pedal, 48 is a comparison section, 491, 49□ are flip-flops, 40 is a code string b"& circuit, 41.
．． 412 is an AND circuit, 42 is an impark, and 46 is a circuit that inputs the base 4a value of the accelerator pedal depression amount, and always outputs Pa0'''.The comparison unit 48 is a circuit that outputs the base 4a value of the accelerator pedal depression amount. A value with a certain amount of change in time (P
l) If the shift signal is too large, set Pl to a certain value that prevents gear shifting even if there is a gear shift signal when the accelerator pedal is depressed too much. Let Pl be another value that, if larger than a certain value (Pl) and smaller than said Pl, will prevent the gear shift from being performed during the return process of the accelerator pedal even if there is a gear shift signal; The value from the arithmetic circuit 47 is compared with either Pl or Pl selected by the sign discrimination circuit 40, and if it is larger than Pl, it is output to flip-flop 491, and if it is thicker than Pl, it is output to flip-flop 492. do. Noritsubu flops 491 and 492 have one of their inputs connected to the comparison section 48.
is connected to transmit an output signal from the comparator 48, and is connected to the other to receive a signal indicating that the amount of change in the accelerator pedal is '0'', and whenever there is no signal from the comparator 48, Each outputs 1".

Next, the operation of the embodiment of the present invention will be explained. The brakes do not operate when driving in the normal automatic transmission range, so
'o' output from brake sensor 07 is impark 42
The output from the accelerator pedal 7 sensor 02 is also inverted and input to the AND circuit 411, and the output is 1.
Since it is input as #, the AND circuit 411 outputs “
1'' is output.

'1# from the AND circuit 411 is input to the AND circuit 412, and when the amount of change in the amount of accelerator pedal depression is less than P1 when depressed and less than P2 when returned,
Frisono Flop 49. ．． Since pa1# is input from 492, the corresponding AND ball is 412 and p ``1''.
is output and sent to E of the analog gate circuit 45, which opens the gear shifter 16 and changes the speed determined by the self-shaving shift gear determining circuit 44 according to the vehicle speed and the amount of depression of the accelerator pedal. (No. g is transmitted to the transmission actuator 111.4 Lully circuit 46 through the analog gate circuit 45, and is shifted to a predetermined variable speed.

When coasting, that is, when you take your foot off the accelerator pedal to apply engine braking, the output from the accelerator pedal sensor 02 becomes ++01N, so this output is sent to the analog gate circuit 45 through the AND circuits 411 and 412', and ■ The gate is closed and the automatic range gear position determination circuit 44 selects the gear shift actuator "-Unique, Hj14.
The signal transmission to the dynamic circuit 46 is stopped.

When the brake is depressed, brake sensor 07
The output ``1'' is inverted by the inverter 42 and ``o
” (, r3 is input to the AND circuit 41 as a force, so it acts on the above and the same equation.

When the foot is removed from the accelerator pedal, the amount of change is determined by the calculation times 47, and if the value is greater than Pl, the comparator 48 calculates the change in lip fluorone: 49.
2, the flip-flop 492 outputs a ``-on'' signal, sends a ``0'' output to E of the analog gate circuit 45 through the AND circuit 412, closes the analog gate circuit, and repeats as above. Stop transmission of the gear change signal.

When the accelerator pedal is depressed, the amount of change is compared with Pl, and if Pl is greater than Pl, the same effect as described in 1 above will be performed.

As explained in detail above, the present invention connects a temporary gear position determination circuit that determines a gear position based on signals from a vehicle speed sensor and an accelerator pedal sensor to a transmission actuator mK excitation circuit via an analog gate circuit, A circuit is provided that sends a signal to the analog gate circuit 1z' when the change '1 [r is larger than a predetermined value] when the accelerator pedal is depressed or released. A small comparison value that prohibits the acceleration, when the accelerator pedal is depressed, and sometimes when kicking down, is slow and hurts the feeling. Since the speed change is controlled according to the situation, the quick response during kickdown may be impaired and the driving feeling may be impaired. Can be done, shift ag 11gj in good condition,
You will get a good feeling.

[Brief explanation of the drawing]

Figure 1 is a hydraulic control circuit diagram for operating the transmission, and Figure 2 is a circuit diagram.

Claims (1)

[Claims] A gear position determination circuit that determines the gear position based on signals from the vehicle speed sensor' and the accelerator pedal sensor is connected to the gear shift actuator drive circuit via an analog gate circuit, and the amount of sagging when the accelerator pedal is depressed or released is controlled. An optimum gear stage detection device for a gear shift, characterized in that a circuit is provided for sending out a signal that closes the analog gate circuit when the respective values are larger than a predetermined value.