JPS62175229A - Control device for vehicle stepless speed change gear - Google Patents

Abstract

PURPOSE:To control the gear ratio of a stepless speed change gear always from a suitable initial value, by providing such an arrangement that, in accordance with an input signal from a main switch, a gear ratio during a vehicle stopping is used as an initial gear ratio when the vehicle speed is zero, and a gear ratio obtained by an actual gear ratio computing means is used as an initial gear ratio when the vehicle speed has a substantial value. CONSTITUTION:An actual gear ratio computing means 5 receives vehicle speed data and engine rotational speed data which are obtained by detecting means 1, 2, respectively, and computes an actual gear ratio. Further, an instructed gear ratio computing means 6 receives the vehicle speed data and throttle opening degree data which are obtained by detecting means 2, 4, respectively, and computes an optimum instructed gear ratio, and a gear ratio control means 7 delivers a speed change gear drive means 8 to compensate the actual gear ratio which therefore coincides with the instructed gear ratio. In the case, an input signal from a main switch and the vehicle speed data respectively obtained by detecting means 1, 2, are delivered to an initial gear ratio setting means 9. Further, when the vehicle speed is zero, a gear ratio during the vehicle stopping is used as an initial gear ratio while when the vehicle speed has a substantial value, a gear ratio computed by the means 5 is used as an initial gear ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a control device for a continuously variable transmission that changes the gear ratio steplessly.

(Conventional Technique #T) For example, some heavy vehicles such as motorcycles are equipped with a continuously variable transmission that changes the gear ratio steplessly.

This continuously variable transmission automatically sets the appropriate gear ratio according to widely changing driving conditions, and transmits the power from the internal combustion engine to the drive wheels according to this set gear ratio, allowing the internal combustion engine to operate efficiently. enable.

By the way, the control of the continuously variable transmission is powered by the input of the main switch, calculates the command gear ratio based on the driving status such as vehicle speed information, throttle opening information, engine rotation speed information, etc. and outputs a control signal. and drive the transmission drive means,
Control is performed according to driving conditions.

(Problem to be solved by the invention) In controlling such a continuously variable transmission, if the main switch is operated by mistake while driving, or if the main switch is turned off while driving downhill, etc., the problem may occur again. Even if you input it, you will not know the gear ratio at that point. Also, when the main switch is turned off, the gear ratio at that point is moved to the low side,
There are some that control from this low side.

For this reason, the initial control value of the continuously variable transmission may not be the predetermined A1 device, and control to obtain a gear ratio according to the driving condition of the Φ vehicle is hindered, making it difficult to quickly shift to a smooth driving condition. There is a risk that you will not be able to do so.

This invention was made against this background.
First, perform the initial setting of the gear ratio according to the driving condition of the vehicle.
It is an object of the present invention to provide a control device for a continuously variable transmission for heavy duty, which can smoothly control the gear ratio.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention turns on the power by inputting the main switch, calculates the gear ratio based on the driving state information, and calculates the gear ratio according to the driving state. In a control device for a heavy-duty continuously variable transmission that changes a gear ratio at a stop, the gear ratio at a stop is set as an initial gear ratio by detecting an input signal when there is no jlj speed in response to an input signal from the main switch. The present invention is characterized in that it has an initial gear ratio setting stage which sets the gear ratio determined by the actual gear ratio calculation stage iI at the time of input upon detection of the number 5 at a certain time as the initial gear ratio.

(For A) In this invention, in response to the input signal of the main switch when the initial gear ratio is set to 1, the gear ratio at the time of stop is set as the initial gear ratio by detecting the input signal when there is no intermediate speed, and the vehicle speed is adjusted to the initial gear ratio. Control is performed using the speed ratio obtained at the lower stage of the actual speed ratio calculation at the time of input (a) as the initial speed ratio.

Therefore, even if the main switch for inputting power is operated, the control of the gear ratio is not affected, and the gear ratio is always controlled from an appropriate initial value.

(Example) An example of the present invention will now be described based on the accompanying drawings.
Explain in detail.

FIG. 1 is a block diagram showing the basic configuration of the present invention.

In the figure, 1 is the main switch operation detection lower stage that detects the on/off operation of both φ main switches, and 2 is 1F.
3 is an engine rotation speed detection stage that detects the rotation speed of the internal combustion engine; and 4 is a throttle opening detection stage that detects the throttle opening of the internal combustion engine.

The heavy speed information obtained by the vehicle speed detection means 2 and the rotation speed information obtained by the engine rotation speed detection stage 1 3 are input to the actual gear ratio calculation lower stage 5, and this actual gear ratio calculation lower stage 5 calculates these information. Based on this, the actual gear ratio is determined.

The vehicle speed information obtained by the vehicle speed detection means 2 and the throttle opening information obtained by the throttle opening detection means 4 are input to the command gear ratio calculation means 6, and the command gear ratio calculation stage 6 determines the optimum command gear ratio. is calculated. The gear ratio control means 7 transmits the commanded gear ratio to the transmission driving means 8, and outputs a control signal for correcting the resulting actual gear ratio to match the commanded gear ratio. Based on the control signal from the gear ratio control means 7, the transmission driving means 8 controls the gear ratio of the continuously variable transmission.

The input signal of the main switch operation detection means 1 and the heavy speed information of the vehicle speed detection means 2 are input to the initial gear ratio setting -1 stage 9. With this initial gear ratio setting 1st gear 9, when the main switch is turned off while driving and turned on again, if the vehicle is not fast, the initial gear ratio is set to the gear ratio when the light rain stopped, and this is used as the reference. The calculation is performed in the first stage 5 of the actual speed ratio calculation.

Further, when the main switch is turned on, if the vehicle speed is high, the actual gear ratio calculation means 5 calculates the gear ratio at that time from the 11th gear and engine rotational speed at that time, and calculates that value as the initial gear ratio. .

FIG. 2 is a more specific configuration diagram in which the present invention is applied to a motorcycle.

In the figure, reference numeral 10 denotes an internal combustion engine mounted on a unicycle. A throttle valve (not shown) is disposed in an intake system 11 of the internal combustion engine 10, and the amount of air-fuel mixture supplied is controlled by the opening degree of the throttle valve. The throttle opening detection means 4 detects the throttle opening and detects the throttle opening in the internal combustion engine 1.
The amount of air-fuel mixture supplied to the engine is detected.

The engine case 12 of the internal combustion engine 10 includes a piston 13.
A crankshaft 14 driven by is rotatably supported. A toroidal continuously variable transmission 16 is connected to one end of the crankshaft 14 via a centrifugal clutch 15. The engine rotational speed detection means 3 detects the rotational speed of the internal combustion engine from the rotational speed of the crank %14.

A housing 17 of the toroidal continuously variable transmission 16 is attached to the engine case 12, and the input @18 is rotatably supported between the housing 17 and the engine case 12.

A cam plate 19 is rotatably disposed at this input @18, and power is transmitted to an input disk 22 via rollers 21 supported by a retainer 20. input disk 22
is loosely connected to the input support 18, and the output disk 23 is disposed opposite to the input disk 22. A power roller 24 is disposed between the rotating curved surfaces 22a and 23a of the input disk 22 and output disk 23. input disk 2
The power from 2 is transmitted to the output tisf 23 via this power roller 24 by friction.

The power rollers 24 are each rotatably provided on a roller shaft 25, and the roller shaft 25 is rotatably supported on a trunnion 26.

The trunnion 26 is disposed in a direction perpendicular to the roller shaft 25, and when it is moved a small amount in the axial direction by the transmission drive means 8, a well-known automatic transmission action occurs and a desired transmission ratio can be obtained.

An output gear 27 is formed on the shaft of the output disk 23,
This output gear 27 meshes with a gear 30 of a connecting shaft 29 that constitutes a knee transmission 28. A gear 31 provided at the other end of this connecting shaft 29 meshes with a gear 33 of an output shaft 32, and a drive sprocket 34 is provided at the end of the output shaft 32 protruding from the engine case 12.

This drive sprocket 34 is provided with a chain (not shown) to transmit power to the drive wheels. The rotational speed of the output @32 is detected by the vehicle speed detection means 2.

Next, the operation of this embodiment will be explained based on the flowchart of FIG.

When the main switch is turned off, for example, by mistake, while the vehicle is running, and the main switch is turned on again, the vehicle speed information obtained by the vehicle speed detection means 2 is read and it is determined whether or not there is a vehicle speed (step a).

b).

If the vehicle is not fast, the initial gear ratio setting means 9 sets the initial gear ratio to the gear ratio at the time of the stop on the east side (step C).

In addition, if the vehicle speed is available, the engine rotation speed is read, the actual gear ratio calculation means 5 calculates the gear ratio at that time from this engine rotation speed and the vehicle speed at that time, and sets this gear ratio as the initial gear ratio. (steps d, e).

Once the initial gear ratio is set in this way, the heavy speed information, engine speed information, and throttle opening information are read (steps f, g+h), and based on the initial gear ratio,
The command control position is calculated by the speed ratio control means 7 from the actual speed ratio obtained by the actual speed ratio calculation means 5 and the command speed ratio obtained by the command speed ratio calculation means 6 (steps i, j), and the command control position is calculated by the speed change ratio control means 7 (steps i, j). The means 8 is controlled to drive the vehicle at a predetermined command gear ratio (step k).

Although the above embodiments have been described with respect to motorcycles, they can be similarly applied to motorcycles, four-wheeled vehicles, and the like. Further, the continuously variable automatic transmission may be a V-belt continuously variable automatic transmission (effects of the invention). By detecting an input signal when there is no input signal, the gear ratio at the time of stop F is set as the initial gear ratio, and when an input signal is detected when the vehicle speed is present, the gear ratio obtained by the actual gear ratio calculating means at that time is controlled as the initial gear ratio. Therefore, even if the main switch that inputs the power operates while the vehicle is running, the gear ratio will always be controlled from the appropriate initial value.Therefore, the gear ratio will be controlled based on the operation of the main switch. This allows for proper control without being affected.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the basic configuration of this invention, FIG. 2 is a configuration diagram in which this invention is applied to a motorcycle, and FIG. 3 is a flow chart showing the operation of this invention. 1... Main switch operation detection means 2... Heavy speed detection means 3... Engine rotation speed detection means 4... Throttle opening detection means 5... Actual speed ratio calculation means 6... Commanded speed change Ratio calculation 1st stage 7... Gear ratio control means 9... Initial gear ratio setting means Supplementary IT-Book October 1986 3 Special 1 B "Secretary Empress Black ITI Ming Xiong 1゛1 kel
Indication of 1986 Patent Application No. 017406 2 Title of the invention Control device for continuously variable transmission for medium thickness 3 Relationship with the person making the amendments Patent applicant address 2500 Shingai, Iwa 111 City, Shizuoka Prefecture Name (80) 7) Yamaha Motor Co., Ltd. 4 Agent 151 Address 2-1123-1 (1) Yoyogi, Shibuya-ku, Tokyo
In the specification, page 7, lines 11 and 12, "-can be rested" is corrected to "can be rotated integrally." (2) “Obtainable J” in the same book, page 9, line 16.
I am corrected. (3) In the same book, page 9, line 17, "in the command speed ratio calculation means 6" is corrected to "in the command speed ratio calculation means 6". (4) In the same book, page 10, line 13, "main switch running" is corrected to "main switch running". (5) Corrections are made as shown in Figure 3 of the attached drawings and the attached sheet. that's all

Claims (1)

[Claims] In a control device for a continuously variable transmission for a vehicle, which is supplied with power by inputting a main switch, calculates a gear ratio based on driving status information, and changes the gear ratio according to the driving status, in response to an input signal from the main switch. Then, by detecting an input signal when the vehicle is not speeding, the gear ratio at a stop is set as the initial gear ratio, and by detecting an input signal when the vehicle is speeding, the gear ratio obtained by the actual gear ratio calculation means at the time of the input is set as the initial gear ratio. A control device for a continuously variable transmission for a vehicle, including an initial gear ratio setting means for setting a gear ratio.