JPH0427721A - Transmission of vehicle - Google Patents

Abstract

PURPOSE:To step unnecessary output control of an engine by not performing the output control of the engine in the case of shifting-up operation in such a state that the gear train for the highest speed range is engaged in a transmission, and also in the case of shifting-down operation in such a state that the gear train for the lowest speed range is installed. CONSTITUTION:There are provided a shift position detecting sensor SG for detecting the gear train engaged in a transmission 10, and also a shifting operation sensor SM for detecting shifting operation. An output controlling means 7 is controlled by means of a control unit 36 so as to temporarily change the output of the engine when the shifting operation has been detected by the shifting operation sensor SM, except for the shifting-up operation in such a state that the gear train for the highest speed range is engaged, and also the shifting-down operation in such a state that the gear train for the lowest speed range is engaged by means of this shift position detecting sensor SG.

Description

[Detailed description of the invention] A1 Purpose of the invention (1) Industrial application fields The present invention relates to a transmission device for a vehicle such as a motorcycle.

(2) Prior Art Conventionally, in vehicles such as motorcycles, when changing gears, it is common to shift the transmission by rotating a shift pedal with the clutch disengaged.

(3) Problems to be Solved by the Invention By the way, in racing motorcycles, it is desired to perform quick shifting operations, whereas in the conventional motorcycles mentioned above,
It is difficult to perform shift operations satisfactorily and quickly. Therefore, in order to enable shifting according to the operation of the shift pedal without releasing the clutch under predetermined conditions, the applicant detects the shift operation by the shift pedal with a switch, and temporarily adjusts the engine output in response to the shift operation. We have already proposed a technology that changes the
No. 869).

However, according to the above-mentioned proposed technology, when a gear train for the highest gear is established in the transmission and an erroneous upshift operation is performed, or a gear train for the lowest gear is established and the shift-up operation is performed by mistake. Engine output control is also executed when a downshift operation is performed, resulting in an undesirable change in engine output.

The present invention has been made in view of the above circumstances, and provides a vehicle gear shift that prohibits unnecessary engine output control when the transmission is mistakenly shifted to a side where shifting is not possible. The purpose is to provide equipment.

Structure of the B1 Invention (1) Means for Solving the K1 Problem The device of the present invention for achieving the above object comprises a gear transmission capable of alternatively establishing a gear train of multiple gears; an output control means capable of controlling the a-power of the engine; a shift position detection sensor that detects a gear train in an established state in the transmission;
a shift operation sensor that detects a shift operation; a shift-up operation in a state where the gear train for the highest gear position is detected by the shift position detection sensor and a downshift operation in a state where the gear train for the lowest gear position is detected; and a control unit that controls an output control means to temporarily change the output of the engine in response to the shift operation detected by the shift operation sensor, excluding the operation.

(2) Effect According to the above configuration, in the transmission, an upshift operation is performed when the gear train for the highest gear is established, and a downshift operation is performed when the gear train for the lowest gear is established. At times, engine output control is not performed.

(3) Example Hereinafter, an example in which the present invention is applied to a racing motorcycle will be described with reference to the drawings.

First, in FIG. 1, a reed valve 3 is disposed in the intake pipe 2 of a two-cycle engine 1 mounted on a motorcycle, and a throttle valve 4 is disposed upstream of the reed valve 3. The valve 4 has an opening degree of the valve 4, that is, a throttle opening degree θ7. Throttle sensor ST [
I is attached. Also, facing the combustion chamber 5, the engine body 1
An ignition plug 6 is disposed at a, and an ignition control device 7 as an output control means for controlling the output of the engine 1 is connected to the ignition plug 6. Further, a constant mesh gear transmission 110 is connected to the crankshaft 8 of the engine l via a transmission mechanism 9, and a rotational speed sensor S□ that detects the rotational speed N of the engine l is connected to the crankshaft 8. will be placed.

Further, a shift device 13 including a shift pedal 12 for performing a shift operation is connected to the transmission 10, and a load sensor SKI as a shift operation sensor for detecting a shift operation is connected to the shift device 13. is arranged to detect.

In FIG. 2, the gear transmission 10 is configured, for example, for six-speed transmission. The transmission case 15 of the transmission 10 includes a main shaft 16 connected to the crankshaft 8 via a transmission mechanism 9, a counter shaft 17 connected to the rear wheels via a chain drive mechanism (not shown), and a shift drum. 18 are rotatably supported parallel to each other around their axes, and a shifter guide shaft 19 is fixedly disposed parallel to these 16, 17, and 18, and the main shaft 16 and counter shaft 17 In between, there are a gear train 201 for the lowest gear, that is, a first gear, a gear train 202 for the second gear, a gear train 205 for the third gear, a gear train 201 for the fourth gear, and a gear train for the fifth gear. 206, and a gear train 206 for the highest gear, that is, the sixth gear. In addition, the shift gears 21 and 2 are attached to the shifter guide shaft 19.
Shifters 24, 25, and 26 that are individually engaged with 2° 23 are fitted so as to be slidable in the axial direction, and these shifters 24 to 26
The guide bins 24a are respectively planted in the guide bins 24a.

25a, 26a are respectively engaged in lead grooves 27, 28, 29 provided on the outer periphery of the shift drum 18 so as to be relatively movable. As the shift drum 18 is intermittently rotated by a predetermined shift angle by the shift device 13, the shifters 24 to 26 are selectively driven to slide, whereby each of the gear trains 206 to 206 is rotated. One is established alternatively.

In this gear transmission 10, in order to detect the gear trains 201 to 206 for each gear in the established state, a shift position detection sensor S is installed in the mission case 15 to detect the rotational position of the shift drum 18, for example. will be placed.

No. 1 again! ! In I, the shift device 13 is configured to shift up by depressing the shift pedal 12 in the direction shown by the arrow 30, and to shift down by turning the shift pedal 12 in the direction opposite to the arrow 30. A shift pedal 12 having a footrest B1'j,a at one end and formed in an abbreviated shape, the bent part of which is supported by the body of the motorcycle via a shaft 31, and a transmission case 15.
A rotating arm 33 whose base end is fixed to a shift shaft 32 that is pivotally supported in An engineer will be intervened. The shift shaft 32 and the shift drum 18 are connected via a conventionally known interlocking and connecting mechanism 35, and the shift drum 18 is intermittently operated by interlocking and connecting mechanism 35 in response to the operation of the shift pedal 12. Rotationally driven.

By the way, when an upshift operation is performed using the shift pedal 12, a tensile load acts on the aforementioned load sensors S and l. outputs an electric signal corresponding to the tensile load as the shift load M at the time of upshifting. Also, load sensor S is activated during downshift operation. outputs an electrical signal corresponding to the compressive load as a shift load during downshifting.

By the way, the shift position GP% load sensor S1. which is detected by the shift position detection sensor SG. The shift load M detected by I, the throttle opening θ3 detected by throttle sensor S T)l, and the engine rotation speed N8 detected by rotation speed sensor S are input to a control unit 36 consisting of a microcomputer. be done. Accordingly, the control unit 36 performs a shift operation of the transmission 10 without disengaging the clutch in response to a shift operation using the shift pedal 12 based on the shift position GP, the shift load M1, the throttle opening θJ, and the engine rotation speed N. The ignition control device 7 is controlled to enable this.

That is, the control unit 36 determines that a shift-up operation has been performed when the shift load M detected by the load sensor S at the time of the shift-up operation exceeds a predetermined value Mth as shown in FIG. As shown in , the ignition timing correction value Δθ, , for controlling the ignition timing by the ignition control device 7 in order to reduce the output of the engine 1 is determined according to the engine speed N and the throttle opening θT□, and The output of the engine 1 is controlled to be reduced by, for example, retarding the ignition timing by an ignition timing correction value of 60,711 minutes. As a result, the output of the engine 1 is reduced, and the operating gear train among the gear trains 201 to 206 is temporarily placed in an unloaded state. It is possible to smoothly rotate and move the selected shifters 24 to 26 to perform an upshift operation. Moreover, during this time, the throttle valve 4 remains open, making it possible to perform upshifts without the need for clutch operation. Furthermore, when a downshift operation is performed while returning the throttle valve 4 to the closed side, the output of the engine 1 is controlled to be temporarily increased while the throttle opening θTM remains fully closed or close to fully closed. Gear train 206 in transmission 10
-206, the load acting on the gear train in operation can be reduced, and a quick downshift operation can be performed while eliminating the need for clutch operation.

By the way, the control unit 36 has a process for prohibiting upshifting when the highest gear gear train 206 is established, and prohibiting downshifting when the lowest gear gear train 206 is established. The procedure is set as shown in FIG. 5, and the control unit 36 executes processing according to the flowchart shown in FIG.

In the first step S1, it is determined whether or not a shift operation has been performed, and when it is determined that one shift operation has been performed, the second
Proceed to step S2. In this second step S2, the gear train 206 for the highest gear position is detected by the shift position detection sensor S6.
It is determined whether the upshift operation is performed in a state where it has been detected that the upshift is established, and if not, the process proceeds to the third step S3. In the third step S3, the gear train 201 for the lowest gear position is detected by the shift position detection sensor Sc.
It is determined whether the downshift operation is in a state where it is detected that the executed.

Next, to explain the operation of this embodiment, the shift load M detected by the load sensor S is applied to the shift pedal 12.
In response to the shift operation by exceeding a predetermined value,
The control unit 36 starts controlling the output of the engine 1, thereby starting a shift operation in the transmission 10.

Therefore, even if an upshift operation is performed by mistake while the highest gear gear train 206 is established, the output control of the engine 1 will not be executed, and the lowest gear gear train 206 will be established. Even if a downshift operation is performed by mistake, the output control of the engine 1 will not be executed. Therefore, shift l! ! Even if a shift operation is mistakenly performed to the side in which the shift operation cannot be performed in 10, the a-power control of the engine 1 will not be undesirably executed.

In the above embodiment, the output of the engine 1 is controlled by correcting the ignition timing at the time of shift, but the output of the engine 1 is also controlled to increase or decrease by controlling the mixture amount, air-fuel ratio, and exhaust timing. You can also do this.

C1 Effects of the Invention As described above, the device of the present invention comprises: a gear transmission capable of selectively establishing a gear train of a plurality of gear stages; an output control means capable of controlling the output of an engine installed in a vehicle; a shift position detection sensor that detects a gear train in an established state in the machine; a shift change sensor that detects a shift operation; a shift in a state where the gear train for the highest gear is detected by the shift position detection sensor; Except for upshift operations and downshift operations when the lowest gear gear train is detected,
and a control unit that controls an output control means to temporarily change the output of the engine in response to the shift operation detected by the shift operation sensor, thereby establishing a gear train for the highest gear in the transmission. Engine output control will not be executed even if you mistakenly perform a 7-wheel shift operation in a state where the gear train is in the lower gear position or a downshift operation in a state where the lowest gear gear train is established.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall configuration diagram, FIG. 2 is a vertical sectional view of the transmission, FIG. 3 is a diagram showing changes in shift load, and FIG. 4 is a diagram showing a change in shift load. Figure 5 shows the control timing of the ignition timing in response to changes in the shift load of 3 das.
The figure is a flowchart showing a processing procedure for prohibiting engine output control. DESCRIPTION OF SYMBOLS 1... Engine, 7... Ignition control device as a force control means, 201... Gear train for lowest gear stage, 20° ~
206...Gear train, 206...Gear train for highest gear stage, 36...Control unit, Sc...Shift position detection sensor, S work...Load sensor as shift operation sensor Patent applicant Honda Giken Kogyo Co., Ltd. Patent Attorney Kendojin Ochiai Figure 3 Figure 4 Elapsed time

Claims (1)

[Claims] A gear transmission (10) that enables alternative establishment of gear trains (20_1 to 20_6) of multiple gear stages; Output control means (7) that can control the output of the vehicle-mounted engine (1);
A gear train (20_) in an established state in the transmission (10)
A shift position detection sensor (S_
G) and; a shift operation sensor (S_
N) and; a shift-up operation in a state where the highest gear gear train (20_6) is detected by the shift position detection sensor (S_G) and the lowest gear gear train (20_6).
1) Except for downshift operation while detecting
and a control unit (36) that controls the output control means (7) to temporarily change the output of the engine (1) in response to the shift operation detected by the shift operation sensor (S_N). A vehicle transmission device characterized by: