JP2584618B2 - Travel control device for continuously variable automatic transmission for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a traveling control device for a continuously variable automatic transmission for a vehicle, which reduces a load on the internal combustion engine when the internal combustion engine is started.

[Prior art]

Some motorcycles include a continuously variable automatic transmission in front of a clutch in a power transmission system of an internal combustion engine. The continuously variable automatic transmission shifts the output of the internal combustion engine to a predetermined gear ratio, and transmits the output of the shifted continuously variable automatic transmission to the rear wheels via an automatic clutch or the like arranged at a subsequent stage. Some vehicles enable efficient operation of vehicles and achieve improved fuel efficiency. The continuously variable automatic transmission calculates an optimum target gear ratio from an opening degree of a throttle that supplies fuel to the internal combustion engine and a vehicle speed, and controls the gear ratio to be the target gear ratio. I have. For this reason, normally, when the vehicle stops, the shift position of the continuously variable automatic transmission is a low gear ratio position having a large reduction ratio. Therefore, when the internal combustion engine is started, the reduction ratio of the continuously variable automatic transmission is large, and the load on the internal combustion engine is reduced.

[Problems to be solved by the invention]

As described above, the speed ratio of the continuously variable automatic transmission is automatically set to the low speed ratio position when the vehicle stops.
In some cases, such as when the vehicle suddenly stops, the vehicle is not set to the low gear ratio position. When the internal combustion engine is started in such a state, since the clutch is arranged at the subsequent stage of the continuously variable automatic transmission, a load applied to the internal combustion engine at the time of starting is increased, and there is a disadvantage that durability is reduced. The problem to be solved by the present invention is to provide a traveling control device for a continuously variable automatic transmission for a vehicle that does not have the above-mentioned disadvantages of the prior art, in other words, to easily reduce the load at the time of starting the internal combustion engine. It is an object of the present invention to provide a traveling control device for a continuously variable automatic transmission for a vehicle, which can reduce the load.

[Means for Solving the Problems]

The present invention provides, as means for solving the above problems,
The following configuration of the invention is adopted. The configuration of the present invention transmits the rotation of the crankshaft of the internal combustion engine to the continuously variable automatic transmission without passing through the clutch, and shifts the transmission.The output of the continuously variable automatic transmission is transmitted to the drive mechanism via the automatic clutch. Detecting the actual speed ratio of the continuously variable automatic transmission,
The target speed ratio of the continuously variable transmission is determined according to the driving state of the vehicle, and the transmission driving means of the continuously variable automatic transmission is controlled so that the actual speed ratio matches the target speed ratio. A running control device for a continuously variable automatic transmission for a vehicle, wherein: an engine start operation detecting means for detecting a start operation of the internal combustion engine; and a low shift for detecting a low gear ratio position of the transmission drive means having a large reduction ratio. The internal combustion engine is provided with a specific position detecting means and a transmission position correcting means for moving the transmission driving means to the low transmission ratio position, and enabling the starter motor to rotate the crankshaft of the internal combustion engine. At this time, when the starting operation is detected by the engine starting operation detecting means, and when the low speed ratio position detecting means detects that the transmission driving means is not at the low speed ratio position, Startamo The transmission position correcting means moves the transmission position of the transmission driving means to a low gear ratio position while rotating the continuously variable automatic transmission for a vehicle via a crankshaft by a motor. In a traveling control device of a continuously variable automatic transmission for a vehicle.

[Operation]

The running control device for a continuously variable transmission for a vehicle according to the present invention, when starting the internal combustion engine, detects that the start operation of the internal combustion engine has been performed by the engine start operation detecting means, and controls the operation of the continuously variable automatic transmission. When the low speed ratio position detecting means detects that the transmission drive means is not at the low speed ratio position, the starter motor rotates the continuously variable automatic transmission for the vehicle via the crankshaft while the transmission is in operation. Activate the position correction means,
Since the shift position of the transmission driving means is moved to the low gear ratio position, the transmission driving means can be easily moved to the low gear ratio position. Therefore, the start of the internal combustion engine becomes easy. In a traveling control device for a continuously variable transmission for a vehicle, there are cases where the continuously variable automatic transmission does not stop at a predetermined low gear ratio position when the vehicle suddenly stops or the like. Engine start operation detecting means detects that the engine has been started, and low gear ratio position detecting means detects that the transmission drive means of the continuously variable automatic transmission is not at the low gear ratio position. By operating the transmission position correcting means, the shift position of the transmission driving means can be easily corrected to a low gear ratio position having a large reduction ratio, so that the load at the time of starting the internal combustion engine can be reduced.

【Example】

One embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a block diagram showing the configuration of the present invention. Reference numeral 1 in FIG. 1 denotes an internal combustion engine mounted on a vehicle. The output of the internal combustion engine 1 is transmitted to a continuously variable automatic transmission 2. As the continuously variable automatic transmission 2, for example, a toroidal-type continuously variable transmission or a V-belt continuously variable transmission is used, and the output of the internal combustion engine 1 is determined by the continuously variable automatic transmission 2 in accordance with a traveling state. Gear ratio. The power to be shifted is transmitted to the drive mechanism 4 of the vehicle via the clutch 3. As the clutch 3, for example, an automatic centrifugal clutch or the like is used, and the drive mechanism 4 includes an axle, a drive wheel, and the like. The control device of the continuously variable automatic transmission 2 is configured as follows. The vehicle speed is detected from the rotation of the drive wheels by the vehicle speed detecting means 5, and the throttle opening is detected by the throttle opening detecting means 6 provided in the carburetor constituting the fuel supply system of the internal combustion engine 1. The vehicle speed information and the throttle opening information are inputted to the target speed ratio calculating means 7, and the target speed ratio calculating means 7 calculates a target speed ratio which is an optimum speed ratio. Based on this target gear ratio, the gear ratio control means 8 determines the current gear ratio from the current operating position of the gearbox driving means 9 and controls the gear ratio driving means so that this gear ratio matches the target gear ratio. 9 is driven. The transmission driving means 9 is provided with a low speed ratio position detecting means 10 for detecting a low speed ratio position at which a large reduction ratio and a large torque can be obtained, and a starting operation from the engine starting operation detecting means 12 of the internal combustion engine 1 is performed. The detection signal is the transmission position correcting means 11
And a detection signal indicating that the vehicle is not at the low gear ratio position from the low gear ratio position detecting means 10 is transmitted to the transmission position correcting means.
When input to the transmission 11, the transmission position correcting means 11 operates to correct the shift position of the transmission driving means 9 to the low gear ratio position. The engine start operation detecting means 12 detects an operation of a starter switch for starting the internal combustion engine 1 or an operation of a kill switch or the like for stopping the internal combustion engine without relying on the power switch.
A start operation detection signal is output. 2 to 5 show a more specific embodiment in which the present invention is applied to a toroidal type continuously variable automatic transmission for a motorcycle. In FIG. 2, reference numeral 20 denotes a scooter-type motorcycle. A front wheel 21 is suspended via a front fork 22 on the front side of the vehicle body. Steering wheel 23 for steering this front wheel 21
An accelerator grip is provided on the right side of the vehicle. The throttle of the carburetor (not shown) provided in the internal combustion engine 24 is opened and closed by the accelerator grip, and the opening of the throttle is detected by the throttle opening detecting means 6. On the rear side of the vehicle body, rear wheels 25, which are driving wheels, are rotatably supported by a power unit 26 including an internal combustion engine 24 via an axle 27, and the front side of the power unit 26 is supported by a vehicle body frame 29 via a bracket 28. The rear side is supported by a vehicle body frame 29 via a suspension (not shown). As shown in FIG. 3, an internal combustion engine 24 has a one-way clutch 32 at one end of a crankshaft 31 rotated by a piston 30.
The one-way clutch 32 is connected to a starter motor 33 via a connection shaft 34 and the like. The starter motor 33 is driven by the operation of a starter switch (not shown) when the internal combustion engine 24 is started, and forcibly rotates the crankshaft 31, thereby starting the internal combustion engine 24. A toroidal-type continuously variable automatic transmission 35 is provided at the tip of the crankshaft 31, the input shaft 38 is connected to the crankshaft 31, and the output shaft 38 is loosely coupled to the input shaft 37 in the housing 36. Are rotatably supported. A cam plate 39 is arranged on the input shaft 37 so as to be integrally rotatable, and power is transmitted to an input disk 41 via a roller 40. The input disk 41 is loosely engaged with the input shaft 37, and an output disk 42 is provided opposite to the input disk 41. The output disk 42 is provided on the output shaft 38,
A rotating curved surface is formed opposite to the input disk 42 and the input disk 41,
A pair of power rollers 43 is provided between these rotating curved surfaces. An output gear 44 is press-fitted into the output shaft 38, and the output gear 44 meshes with a gear 46 of the intermediate shaft 45. The power roller 43 has a toroidal convex surface that engages with the rotating curved surface, and is rotatably supported by the trunnion 47 via a roller shaft.
Is transmitted to the output disk 42, and the rotation ratio of the disks 41, 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 vertically (in a direction perpendicular to the plane of FIG. 3). 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 well-known automatic speed change operation occurs, and a desired speed ratio can be obtained. The vertical movement of the trunnion 47 is performed by the transmission driving means 9 shown in FIG. A rotary shaft 48 constituting the transmission driving means 9 is disposed in parallel with the input shaft 37, and a trunnion 47 is connected to a guide 49 which is screwed on the rotary shaft 37 via a link 50 and a nut member 51. ing. The wheel gear 52 provided at the end of the rotating shaft 48 meshes with the worm gear 54 of the servomotor 53, and the servomotor 53
Drives the rotating shaft 48. This will guide 49
Moves on the rotation shaft 48, and rotates the trinion 47 in the forward and reverse rotation directions. When the guide 49 is located on the servo motor 53 side, the speed ratio of the continuously variable automatic transmission 35 is small (that is, the reduction ratio is large), and as the guide 49 moves away from the servo motor 53, The gear ratio is set to be large (that is, the reduction ratio is small). As shown in FIG. 4, the transmission driving means 9 is provided with a low speed ratio position detecting means 10. The low gear ratio position detecting means 10 is constituted by, for example, a limit switch, detects the low gear ratio position at the position of the guide 49, and stops driving of the transmission position correcting means 11. The transmission position correcting means 11 is driven by a start operation signal from the engine start operation detecting means 12. For example, the operation of the starter switch that drives the starter motor 33 is detected, and the transmission position correcting means 11 is operated. The servo motor 35 is controlled by the speed ratio control means 8, to which the target speed ratio calculated by the target speed ratio calculation means 7 is input. Vehicle speed information from the vehicle speed detecting unit 5 is input to the target speed ratio calculating unit 7,
At the same time, throttle opening information from the throttle opening detecting means 6 is input. An output pulley 55 is key-engaged with the intermediate shaft 45, and an input pulley 58 of an automatic clutch 57 is connected via a timing belt 56.
Is linked to The input pulley 58 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 input pulley 58 so as to be integrally rotatable. It is provided as possible. With the rotation of the clutch center 60, the centrifugal roller
62 moves outward to bring the clutch plates 63 and 64 into sliding contact, and the clutch is disconnected. The driving force of clutch shaft 59 is axle
27, whereby the rear wheel 25 rotates. In FIG. 3, the right half of the automatic clutch 57 shows the clutch connection state in which the centrifugal roller 62 has moved outward, and the left half shows the clutch disengagement state in which the centrifugal roller 62 is located inside. Next, the operation of the embodiment will be described based on the control flowchart of FIG. In step a, it is determined whether or not the vehicle is stopped based on the vehicle speed information from the vehicle speed detecting means 5. In step b, when the vehicle is stopped, it is determined whether or not the start operation of the internal combustion engine 24 is performed by operating a starter switch or the like. In step c, when the engine starting operation detecting means 12 detects that the starting operation has been performed, the low gear ratio position detecting means 10 determines whether the guide 49 of the transmission driving means 9 is located at the low gear ratio position. Is determined. In step d, if the guide 49 of the transmission driving means 9 is not at the predetermined low gear ratio position, the transmission position correcting means 11 drives the servomotor 53 of the transmission driving means 9 to lower the guide 49. Move to gear ratio position. In this operation, when a predetermined low gear ratio position is reached, the drive of the transmission position correcting means 11 is stopped by the detection signal of the low gear ratio position detecting means 10. When the internal combustion engine 24 is started at the low speed ratio position of the transmission driving means 9, the continuously variable automatic transmission 33 has a large reduction ratio.
Is reduced when the internal combustion engine 24 is started. In step e, the vehicle speed information from the vehicle speed detecting means 5 and the throttle opening information from the throttle opening detecting means 6 are read into the speed ratio calculating means 7. In step f, the target speed ratio calculating means 7 calculates a target speed ratio as a control target from the vehicle speed information and the throttle opening information. In step g, the gear ratio control means 8 determines the current gear ratio from the operating position of the transmission drive means 9, and determines the target control position of the gear drive means 9 that can match this gear ratio with the target gear ratio. Calculate. In step h, the servo motor of the transmission driving means 9 is moved so that the transmission driving means 9 is located at the target control position.
By driving 53, the speed ratio of the continuously variable automatic transmission 33 is controlled. The low speed ratio position detecting means 10 is not limited to the limit switch, and may be constituted by a magnetic sensor, a photo sensor, or the like.
The low gear ratio position may be detected from the position of 51 or the link 50. According to the present invention, a pulley is provided on the trunnion 47 without using a link mechanism as in the transmission driving means 9 of the embodiment, and the pulley and the guide 49 are connected by a wire.
The present invention can be similarly applied to a mechanism that operates the trunnion 47 by rotating the pulley via the wire by the movement of the 49. In the motorcycle of the embodiment, when starting the internal combustion engine 24, the starter switch is operated to operate the starter motor.
When the 33 is driven, the crankshaft 31 rotates and the crankshaft 31
With the rotation of 31, the input shaft 37, input disk 41, power roller 43, output disk 42, output gear 44, gear 46, intermediate shaft 45, and output pulley of the toroidal type continuously variable automatic transmission 35
55 rotates, and the output pulley 55 rotates
Is transmitted to the input pulley 58 of the automatic clutch 57 via the
However, the rotation of the input pulley 58 is controlled by the clutch center 60, the centrifugal roller 62, the clutch outer 61, and the clutch plates 63 and 64.
Through the clutch shaft 59, when the input pulley 58 rotates at low speed, the clutch shaft 59, the axle
27 mag does not rotate. When the motorcycle is suddenly stopped, the continuously variable transmission 35
May be stopped at a position other than the predetermined low gear ratio position. When the starter switch 33 is operated to drive the starter motor 33 in a state where the shift position of the continuously variable automatic transmission 35 is not at the predetermined low gear ratio position, the output disc 42, the output gear 44, The gear 46, the intermediate shaft 45, the output pulley 55, the timing belt 56, and the input pulley 58 of the automatic clutch 57 are moved at a high speed, and the load when starting the internal combustion engine is increased. However, when the motorcycle is suddenly stopped and the transmission driving means 9 of the continuously variable transmission 35 stops at a position other than the predetermined low gear ratio position, the operation of the transmission position correcting means 11 causes the continuously variable automatic transmission 35 to operate. When the shift position of the transmission 35 is corrected to a low gear ratio position having a large reduction ratio, the output disk 42, the output gear 44, the gear 46, the intermediate shaft 45, and the output pulley of the continuously variable automatic transmission 35 are changed.
By moving the timing belt 56 and the input pulley 58 at a low speed, the load at the time of starting the internal combustion engine can be reduced. In step d above, when the transmission position correcting means 11 corrects the shift position of the transmission driving means 9, the transmission mechanism including the automatic clutch 57 is used to control the rotation of the output shaft 38 of the continuously variable automatic transmission 35. Since the transmission is transmitted to the axle 27 of the rear wheel 26 via the crankshaft 31, the starter motor 33 drives the servomotor 53 while rotating the continuously variable automatic transmission 35 via the crankshaft 31. It can be easily moved to the low gear ratio position. In the embodiment, the friction type automatic centrifugal clutch is used as the automatic clutch. However, when the rotation speed of the clutch input shaft (the clutch center 60 in the embodiment) becomes equal to or higher than a certain rotation speed, the clutch input shaft is automatically turned on. Any structure that can transmit rotation to the output shaft of the clutch (the clutch shaft 59 in the embodiment) can be used. In the embodiment, an example in which the present invention is applied to a motorcycle is described, but the present invention can be similarly applied to a motorcycle, a motorcycle, and the like. Further, in the embodiment, the example in which the toroidal type continuously variable transmission is used as the continuously variable automatic transmission has been described. However, another type of continuously variable automatic transmission may be used.

【The invention's effect】

The traveling control device for a continuously variable automatic transmission for a vehicle according to the present invention includes:
An engine start operation detecting means for detecting a start operation of the internal combustion engine; a low speed ratio position detecting means for detecting a low speed ratio position having a large reduction ratio of the transmission driving means; and the transmission driving means at the low speed ratio position. Transmission position correcting means to move, and so that the starter motor can rotate the crankshaft of the internal combustion engine, when starting the internal combustion engine,
When the start operation is detected by the engine start operation detecting means, and when the low speed ratio position detecting means detects that the transmission driving means is not at the low speed ratio position, the starter motor is turned on. While rotating the continuously variable automatic transmission for the vehicle via the crankshaft, the transmission position correcting means moves the transmission position of the transmission driving means to the low gear ratio position, so that the internal combustion engine is started. Can always be done easily. In a traveling control device for a continuously variable automatic transmission for a vehicle, the shift position of the transmission driving means of the continuously variable automatic transmission may not stop at a predetermined low gear ratio position when the vehicle suddenly stops. In such a case, when the internal combustion engine is started, it is detected by the engine start operation detecting means that the start operation has been performed, and the transmission drive means of the continuously variable automatic transmission is not at the low speed ratio position. This is detected by the low gear ratio position detecting means, and while the starter motor rotates the continuously variable automatic transmission for the vehicle via the crankshaft, the transmission position correcting means is operated to change the speed of the transmission driving means. Since the position is corrected to the low gear ratio position having a large reduction ratio, the load at the time of starting the internal combustion engine can be reduced, and the durability of the device can be further improved. In the traveling control device for a continuously variable automatic transmission for a vehicle according to the present invention, the rotation of the crankshaft of the internal combustion engine is transmitted to the continuously variable automatic transmission without the intervention of the clutch, and the speed is changed. Since the output is transmitted to the drive mechanism via the automatic clutch, when the shift position of the transmission drive unit is corrected by the transmission position correction unit, the starter motor uses the crankshaft to correct the shift position. The shift position can be corrected while rotating the continuously variable automatic transmission, and the shift position of the transmission drive unit can be corrected without difficulty.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the structure of the present invention, and FIGS. 2 to 5 show an embodiment in which the present invention is applied to a toroidal type continuously variable automatic transmission of a motorcycle. FIG. 2 is a motorcycle. FIG. 3 is a sectional view of a power unit of a motorcycle, FIG. 4 is a plan view of a transmission drive unit, and FIG. 5 is a flowchart of a control program. DESCRIPTION OF SYMBOLS 1 ... Internal combustion engine, 2 ... Continuously variable automatic transmission 3 ... Clutch 4 ... Driving mechanism 7 ... Target gear ratio calculating means 8, ... Gear ratio control means 9 ... Transmission driving means 10, 10 ... … Low gear ratio position detecting means 11… Transmission position correcting means 12… Engine starting operation detecting means 18… Toroidal type continuously variable transmission 18… Input shaft 22… Input disk 23… Output disk 24 Power roller, 32 Output shaft 32 Starter motor, 47 Trunnion 48 Rotary shaft, 49 Guide 50 Link, 52 Wheel gear 53 Servo motor, 54 Worm gear 57 …… Automatic clutch

Claims (1)

(57) [Claims] A step of transmitting the rotation of a crankshaft of an internal combustion engine to a continuously variable automatic transmission without a clutch, and transmitting an output of the continuously variable automatic transmission to a drive mechanism via an automatic clutch; The stepless automatic transmission detects an actual gear ratio of the continuously variable transmission, determines a target gear ratio of the continuously variable transmission according to a driving state of the vehicle, and adjusts the actual gear ratio to the target gear ratio. In a travel control device for a continuously variable automatic transmission for a vehicle that controls a transmission drive unit to control a gear ratio, an engine start operation detection unit that detects a start operation of the internal combustion engine; A low gear ratio position detecting means for detecting a low gear ratio position having a large reduction ratio; a transmission position correcting means for moving a transmission driving means to the low gear ratio position; To be able to rotate When the internal combustion engine is started, it is detected by the engine start operation detecting means that the start operation has been performed, and the low gear ratio position detecting means detects that the transmission driving means is not at the low gear ratio position. When you detect it,
While the starter motor rotates the continuously variable automatic transmission for the vehicle via the crankshaft, the shift position of the transmission driving means is moved to the low gear ratio position by the transmission position correcting means. Control device for continuously variable automatic transmission for vehicles.