JPS62273187A - Travelling controller of non-stage automatic transmission for car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) This invention relates to a running control device for a continuously variable transmission for a vehicle that reduces the load on an internal combustion engine when starting the engine. It is.

(Prior art) In some motorcycles, etc., the power transmission system of the internal combustion engine is equipped with a continuously variable automatic transmission (iPR) at the stage before the clutch. It changes gears and outputs to the automatic clutch etc. placed in the rear stage,
It enables the internal combustion engine to operate more efficiently and improves fuel efficiency.

This continuously variable automatic transmission calculates the optimal target gear ratio from the throttle opening that supplies fuel to the internal combustion engine and the vehicle speed.
This gear ratio is sub-column.

Therefore, when the vehicle stops, the gear position of the continuously variable automatic transmission becomes a low gear ratio position where the gear ratio is large. Therefore, when starting the internal combustion engine, the gear ratio of the continuously variable automatic transmission is large to reduce the load on the internal combustion engine.

(The problem that the invention attempts to solve in solution 7) In this way, the gear ratio of the fence stage automatic transmission is automatically set to the low gear ratio position when the vehicle stops, but when the vehicle suddenly stops, etc. For some reason, the gear ratio may not be set to the low gear ratio position.

When the internal combustion engine is started in such a state, since the clutch is disposed at the rear of the continuously variable automatic transmission, the load on the internal combustion engine at the time of starting increases, and there is a risk that the fire resistance may deteriorate.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a travel control device for a continuously variable automatic transmission for a vehicle that reduces the load upon starting an internal combustion engine.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention aims to change the speed of the output of an internal combustion engine by a continuously variable automatic transmission, and the output of the continuously variable automatic transmission is transmitted through a clutch. In a driving control device for a continuously variable automatic transmission for a vehicle, the transmission is transmitted to a drive mechanism and the continuously variable automatic transmission is controlled by a transmission driving means according to the driving state. low gear ratio position detection means for detecting a gear ratio position; engine starting operation detection means for detecting a starting operation of the internal combustion engine; and a transmission position correction for driving the transmission driving means to a low gear position by the starting operation. It is characterized by having the means.

(Operation) According to the present invention, a low gear ratio position where the gear ratio is large is detected by a low gear ratio position detecting means. The engine starting operation detecting means detects a starting operation of the internal combustion engine, and if the continuously variable automatic transmission is not in the low shift position at this time, the transmission position correcting means operates the continuously variable automatic transmission. Since the continuously variable automatic transmission is corrected to the low gear ratio position where the gear ratio is large, even if the continuously variable automatic transmission is not stopped at the predetermined low gear ratio position due to a sudden stop of the vehicle, etc., the internal combustion m The load on engine startup is reduced.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the configuration of the present invention. Reference numeral 1 denotes an internal combustion engine mounted on a vehicle, and the output of this internal combustion engine 1 is transmitted to a continuously variable automatic transmission 2. As shown in FIG. This continuously variable automatic transmission R2 uses, for example, a toroidal type continuously variable transmission or a V-belt continuously variable transmission, and the continuously variable automatic transmission changes the speed to a predetermined gear ratio depending on the driving condition. The speed-changed power is transmitted to the drive mechanism 4 via the clutch 3. For example, a centrifugal clutch or the like is used as the clutch 3, and the drive mechanism 4 is composed of a drive wheel or the like.

The 1 lall device of the continuously variable automatic transmission 2 is configured as follows.

A vehicle speed detecting means 5 disposed in the drive mechanism 4 detects the vehicle speed 7. On the other hand, a throttle opening detecting means 6 provided in a carburetor constituting the fuel supply unit of the internal combustion engine 1 detects the throttle opening. This vehicle speed and throttle opening information are input to the target speed ratio calculation means 7, and the target speed ratio calculation means 7 calculates a target speed ratio that is the Ft running speed ratio. Based on this target gear ratio, the gear ratio auxiliary cylinder means 8 cuts off the current gear ratio by 111 from the operation f7J of the 7!2 gear drive means 9, and changes the gear so that this gear ratio matches the target gear ratio. The transmission driving means 9 that drives the machine driving means 9 has a large transmission ratio and a low transmission ratio (ff) that detects a low transmission position where a large torque can be obtained.
lilj pressure detection means 10 is provided, and this detection signal causes [II# of the transmission position correction means 11 to be stopped] 7 This transmission position correction means 1! is actuated based on the operation signal of the engine starting movement test means 12 of the internal combustion engine 1, and the transmission drive means 9
Correct it to the low gear position.

The engine start operation detection means 12 detects the operation of a starter switch to start the internal combustion engine, the kill switch to stop the internal combustion engine without depending on the power switch, and outputs a detection signal. There is.

Figures F22 to 5 show more specific embodiments in which the present invention is applied to a toroidal continuously variable transmission.

In the figure, reference numeral 20 denotes a scooter-type motorcycle, and a front wheel 21 is suspended on the front side of the vehicle body via a front fork 22.7 A handle 23 is used to control the front wheel 21.
An accelerator grip (not shown) is provided on the right side of the engine 7. This accelerator grip opens and closes a throttle of a carburetor (not shown) provided in the internal combustion engine 24, and the opening degree of this throttle is detected by the throttle opening detection means 6. 6
On the rear side of the vehicle body, a rear wheel 25, which is a driving wheel, is connected to an internal combustion engine 24.
The power unit 26 is rotatably supported via an axle 27, and the front side of the power unit 26 is supported via a bracket 28, and the rear side is supported by a vehicle body frame 29 via a suspension (not shown).

As shown in FIG. 3, the internal combustion engine 24 is equipped with a one-way clutch 32 at one end of the crank 11!1lI31 which is rotated by a piston 30.
2 is connected to a starter motor 33 via a connecting shaft 34 7 The starter motor 33 is driven by operation of a starter switch (not shown) when starting the internal combustion engine, and forcibly rotates the crankshaft 31, thereby starting the internal combustion engine. 24.

A toroidal silent automatic transmission 35 is disposed at the tip of the crank 111131, and in its housing 36 there is an input shaft 37 connected to the crankshaft 31 via a one-way clutch 32, and an input shaft 37 connected to the human power shaft 37. A cam plate 39 is rotatably disposed at the input @ 37 on which the output shaft 38 to be combined is rotatably supported, and power is transmitted to the input disk 41 via rollers 40 . The human power disk 41 is loosely engaged with the human power shaft 37, and an output disk 42 is disposed opposite to this human power disk 41.

The output disk 42 is provided on the output shaft 38, the output disk 42 and the input disk 41 are configured with opposing rotating curved surfaces, and a pair of power rollers 43 are disposed between the rotating curved surfaces. An output gear 44 is press-fitted into the output shaft 38 and meshes with a gear 46 on an intermediate shaft 45 .

The power rollers 43 each have a toroidal convex surface that engages with the rotating curved surface, and are each rotatably supported by a trunnion 47 via a roller shaft to transmit power from the human-powered disk 41 to the output disk 42. At the same time, the rotation ratio of both disks 41 and 42, that is, the gear ratio is controlled.

The trunnion 47 is supported by the housing 36 so as to be able to move slightly in the vertical direction (in the direction perpendicular to the plane of paper in Figure M3). When the trunnion 47 moves a small amount in the vertical direction, the power roller 43 is displaced in the vertical direction, so that a known gear shifting action occurs, and the desired gear ratio is obtained. This is performed by a transmission drive means 9 shown in FIG. A rotating shaft 48 constituting the transmission drive means 9 is arranged parallel to the input shaft 37, and a trunnion 4 is attached to a guide 49 that threads this rotation fi48.
7 are connected via a link 50 and a nut member 51.

A wheel gear 52 provided at an end of the rotating shaft 48 meshes with a worm gear 54 of a servo motor 53, and the rotating shaft 48 is rotated by the drive of the servo motor 53. This results in
Guide 49 rotates @48F.

is linearly moved to rotate the trunnion 49 in the forward and reverse directions.

The gear ratio of the continuously variable automatic transmission 35 is set to be large when the guide 49 is located on the servo motor 53 side, and to become smaller as the distance from the servo motor 53 increases.

The gear ratio drive means 9 also includes a low gear position detection means 10.
The low gear shift position detecting means 10 is comprised of, for example, a limit switch. Then, the low shift position detecting means 10 detects the low shift position at the position of the guide 49, and stops driving the transmission 4q position correcting means 11.

The transmission position correcting means 11 is driven by the engine starting operation detecting means 12, and is detected by the operation of the starter switch that drives the starter motor 33, and the transmission position correcting means 1 is detected by the operation of the starter switch that drives the starter motor 33.
Activate 1.

The servo motor 53 is controlled by a speed ratio control means 8, and this speed ratio drive means 8 includes a target speed ratio calculation means 7.
The calculation results are calculated manually. This 11 gear ratio calculation means 7
The throttle opening information is input from the ffi speed ratio detection means 5-B connection information or the throttle opening detection means 6.

An output cover 955 is keyed to the intermediate shaft 45 and connected to an input cover 58 of an automatic clutch 57 via a timing belt 56 . The man-powered pulley 958 is loosely engaged with the clutch shaft 59 of the automatic clutch 57, and a clutch center 60 is provided on the shaft of the man-powered pulley 58 so as to be able to rotate integrally therewith. possible. Rotation of the clutch center 60 causes the centrifugal roller 62 to move outward and bring the clutch plates 63 and 64 into sliding contact, thereby engaging and disengaging the clutch. The driving force of the clutch l1lII59 is transmitted to the car @27, thereby causing the rear wheel 25 to rotate.

In FIG. 3, the right half of the automatic clutch 57 shows a clutch engaged state in which the centrifugal roller 62 has moved outward, and the left half shows a clutch disengaged state in which the centrifugal roller 62 is located inward.

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

First, in step a, it is determined whether the vehicle is stopped based on the vehicle speed, and if the vehicle is stopped, it is determined whether or not the internal combustion engine 24 is started by operating the starter switch or the like (step b). When a starting operation is performed, the low gear ratio position detecting means 10 determines whether the guide 49 of the gear shifting m drive means 9 is located at the low gear shifting position (step C).

When the guide 49 of the transmission driving means 9 is not at the predetermined position, the transmission 4d position correcting means 11 drives the servo motor 53 of the transmission driving means 9 to move the guide 49 to the low shift position. With this operation, when the predetermined low gear shift position is reached, the drive of the transmission position correction means 11 is stopped based on the detection signal of the low gear shift pressure detection means 10 (step d).
.

When the internal combustion engine 24 is started in this low gear shift position, the continuously variable automatic transmission 33 starts moving the internal combustion engine 24 because the gear ratio is large.
The load on starting the engine is reduced.

Next, vehicle speed information is read from the vehicle speed detection means 5 and throttle opening information is read from the throttle opening detection means 6 (step e). From this information, in step f, the target gear ratio calculation means 7 calculates a target gear ratio for control.

Based on this target gear ratio, the gear ratio control means 8 determines the current gear ratio from the operating position of the f serial drive means 9, and drives the transmission drive means 9 so that this gear ratio matches the target gear ratio. (steps g, h), continuously variable automatic transmission 33
The low shift position detection means 10 is not limited to a limit switch, but may also be composed of a magnetic sensor, a photo sensor, etc., and is not limited to detecting the position of the guide 49,
The low gear shift position may be detected from the position of the link 1 or the link 50.

Furthermore, without using such a link R structure, a bobbin is provided on the trunnion 47, this pulley and a guide 49 are connected with a wire, and the bobbin is rotated via the wire by movement of the guide 49, and the trunnion The same can be applied to the mechanism for operating 47.

(Effects of the Invention) As described above, the present invention detects the low gear ratio position of a continuously variable automatic transmission with a large gear ratio using the low gear ratio (9 position ratio checking means), When the transmission is not in the low gear position, the continuously variable automatic transmission is operated by the transmission position correction means to be in the low gear ratio position, so if the vehicle suddenly stops, etc., the continuously variable automatic transmission is in the low gear position. Even if the internal combustion engine is not stopped at this point, it is corrected to a predetermined low shift position.Therefore, the load on the continuously variable automatic transmission is reduced when the internal combustion engine is started, and the fire resistance of the device is further improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of the present invention, Figs. 2 to 5 show an embodiment in which the invention is applied to a toroidal continuously variable automatic transmission, and Fig. 2 is a side view of a motorcycle. , yJ3 is a sectional view of the power unit, FIG. 4 is a plan view of the transmission drive means, and FIG. 5 is a control flowchart. 1...Internal combustion engine 2...Continuously automatic transmission 3...Clutch 4... Drive mechanism 7... Target gear ratio calculation means 8... Gear ratio control means 9... Transmission drive means

Claims (1)

[Claims] The output of the internal combustion engine is shifted by a continuously variable automatic transmission, and the output of the continuously variable automatic transmission is transmitted to a drive mechanism via a clutch, and the continuously variable automatic transmission is controlled by a transmission drive means according to the driving condition. In the travel control device for a continuously variable automatic transmission for a vehicle, the drive control device includes a low gear ratio position detection means for detecting a low gear ratio position of the continuously variable automatic transmission having a large gear ratio, and a low gear ratio position detection means for detecting a starting operation of the internal combustion engine. A travel control device for a continuously variable automatic transmission for a vehicle, comprising an engine starting operation detecting means for detecting an engine starting operation, and a transmission position correcting means for driving the transmission driving means to a low shift position by the starting operation.