JPH0415355A - Detection of shift operation for speed change gear for vehicle - Google Patents

Abstract

PURPOSE:To surely detect shift operation by detecting the shift load acting on a shift operation member and carrying out a correction of the shift load at zero point, having the average value through the lapse of time of the shift load as offset value. CONSTITUTION:A control unit 36 judges whether the difference DELTAM between the shift load read-in value at the preceding time and the shift load read-in value at this time is larger than a set value A or not. When it is judged that the difference DELTAM of the shift load is smaller than the set value A, accordingly, when it is judged that a driver unconsciously places his foot on a shift pedal 12, the average value between the shift load M read at the preceding time and the shift load M read at this time is calculated, and the shift load M is corrected at zero point, regard the average value as offset value. In the state where the foot is simply placed on the shift pedal 12, the increase of the shift load M is suppressed, and when the shift load M increases, accompanied with the actual shift operation, it is judged that the shift operation is carried out, and the output control for an engine 1 is executed.

Description

Detailed Description of the Invention A1 Objective of the Invention (1) Industrial Application Field The present invention has a shifter interlocked and connected to a shift operation member to selectively establish a gear train of multiple gear stages. The present invention relates to a shift operation detection method for a vehicle transmission for detecting that the shift operation by the shift operation member has been completed during the shift operation of the transmission mounted on the vehicle.

(2) Conventional technology Conventionally, in vehicles such as motorcycles, when changing gears, it is common to shift the transmission by turning the shift pedal with the clutch disengaged. Motorcycles for racing require faster shift operations, and from this perspective, the applicant has developed a shift pedal that enables gear changes according to the operation of the shift pedal without disengaging the clutch under predetermined conditions. A technology has already been proposed in which the shift operation load is detected, and when the shift operation load exceeds a predetermined value, it is determined that a shift operation has been performed, and the engine output is temporarily changed (Utility Application No. 2-24331). No.).

(3) Problems to be Solved by the Invention However, in motorcycles, the rider may unconsciously place his or her foot on the shift pedal, and it is difficult to perform a shift operation from this state with the foot placed on the shift pedal. When a shift operation load is applied to the shift pedal, the above-mentioned proposed technology detects the shift load using the state where the foot is not placed on the shift pedal as the zero point, so the timing of the transmission shift operation and engine output control is adjusted. Misalignment and shift feeling worsen.

The present invention has been made in view of the above circumstances, and is capable of reliably detecting that the driver has made a shift (W) movement with clear intention even if the driver unconsciously applies force to the shift (shift) movement member. The purpose of this invention is to provide a method for detecting the shift of a vehicle transmission.

B5 Structure of the Invention (1) Means for Solving the Problems According to the method of the present invention for achieving the above object, the shift load acting on the shift and operation member is detected, and
The shift load is zero-point corrected using the temporal average value of the shift load as an offset value, and it is determined that a shift operation has been performed when the corrected shift load becomes equal to or greater than a predetermined value.

(2) Effect According to the above method, even if the driver unconsciously applies a load to the shift member, the shift load during that period is averaged,
Since zero point correction is performed using the average value as an offset value, even if a shift operation is performed while unconsciously applying a load to the shift member, the shift operation will be performed using only the shift load associated with the shift) 11 operation. Can be detected.

(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 of all, in Fig. 1, two rhinoceroses mounted on a motorcycle,
A reed valve 3 is disposed in the intake pipe 2 of the engine 1, and a throttle valve 4 is disposed upstream of the reed valve 3. Throttle sensor 5 that detects degree θTl+
TII is attached. Further, an ignition plug 6 is disposed in the engine body 1a facing the combustion chamber 5, and an ignition control device 7 is connected to the ignition plug 6. Furthermore, a constant mesh gear transmission 10 is connected to the crankshaft 8 of the engine 1 via a transmission mechanism 9, and a rotational speed sensor S, 1g that detects the rotational speed N of the engine 1 is connected to the crankshaft 8. It will be arranged as follows. Further, a shift device 13 including a shift pedal 12 for performing a shift a operation is connected to the transmission 10, and a load sensor S is disposed on the shift pedal 12 to detect a shift load M.

In FIG. 2, the gear transmission 10 is configured, for example, as a 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, the first
Gear trains 20, for establishing second, third, 'M4, fifth and sixth gears, respectively.

202, 20. ．． 20. ．． 20s and 2L are interposed.

In addition, the shifter guide shaft 19 has shift gears 21, 22, 2.
Shifters 24, 25, and 26 that are individually engaged with the shift drums 3 and 3 are fitted to be slidable in the axial direction. Lead groove 2 provided in ? ,2
8.29 are respectively engaged for relative movement. As the shift drum 18 is intermittently rotated by a predetermined shift angle by the shift device 13, the chics 24 to 26 are selectively driven to slide, thereby causing each gear train 20. ~20g is alternatively established.

Referring again to FIG. 1, the shift device 13 has a structure in which the shift pedal 12 is depressed in the direction indicated by the arrow 30 to shift up, and the shift pedal 12 is rotated in the opposite direction to the arrow 30 to shift down. The shift pedal 12 is formed in an abbreviated shape with a foot rest part 12a at one end, and its bent part is supported by the body of the motorcycle via a shaft 31, and the shift pedal 12 is pivotally supported by a transmission case 15. The load sensor S includes a rotating arm 33 whose base end is fixed to the shift shaft 32, and a link 34 that connects the shift pedal 12 and the rotating arm 33, and the load sensor S can detect loads from any direction. It is arranged to surround the footrest R12a. The shift shaft 32 and the shift drum 18 are connected via a conventionally well-known movement and connection mechanism 35, and are interlocked in response to the operation of the shift pedal 12.
The shift drum 18 is intermittently rotationally driven by the operation of the coupling mechanism 35.

By the way, the shift WMM detected by the load sensor S11
, throttle opening θ4 detected by throttle sensor SA, and engine rotational speed N5 detected by rotational speed sensor 5alt are respectively input to a control unit 36 consisting of a microcomputer. Then, the control unit 36 disengages the clutch in response to an upshift operation using the shift pedal 12 with the throttle valve 4 open, based on the shift load M, the throttle opening degree 0, and the engine speed N5. In order to enable upshifting of the transmission 10 without
The ignition control device 7 is controlled in order to enable a downshift operation of the transmission 10 without disengaging the clutch in response to a downshift operation using the shift pedal 12 while the ignition control device 7 is held fully closed or in the vicinity of a fully closed position.

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 during the shift-up operation exceeds a predetermined value Mtg as shown in FIG. As shown in , the ignition timing correction value Δθ1 . And the holding time T is the engine rotation speed N. and throttle opening θTl+, and its ignition timing correction value Δθ
,.

The output of the engine 1 is controlled to be reduced by correcting the ignition timing, for example, to the retarded side. As a result, the output of the engine 1 is reduced, and each gear train 201 to 206 is
Among them, the gear train that is in operation is temporarily put in an unloaded state, and during that time, the meshing friction force of the gear train is reduced to reduce the shift drum 1.
8 and the selected shifters 24 to 26 can be smoothly rotated to perform an upshift operation. Moreover, during this time, the throttle valve 4 remains open, and upshifting can be performed without the need for clutch operation. Furthermore, when a downshift operation is performed while returning the throttle valve 4 to the closed side, each gear train 20 ．． - 206, the load acting on the gear train in operation due to engine braking is temporarily reduced, and a downshift operation can be performed without the need for clutch operation.

However, the control unit 36 includes a load sensor S11.
The processing procedure for correcting the shift load M detected by is set as shown in FIG.

In the first step S1, it is determined whether it is the timing to read the shift load M, and if it is the timing to read the load, the process proceeds to the second step S2. In this second step S2, it is determined whether the difference ΔM between the previous shift load read value and the current shift load read value is larger than the set value, that is, whether the driver consciously operated the shift pedal 12. be judged.

In the second step S2, when it is determined that the shift load difference ΔM is smaller than the set value A, that is, when it is determined that the driver is unconsciously placing his foot on the shift pedal 12, the third step S2 is performed. Proceeding to S3, in this third step S3, the average value of the shift load M, that is, the average value of the shift load M read last time and the shift load M read this time, is calculated, and the average value is used as an offset value. The zero point correction of the shift load M is performed as follows.

Next, the operation of this embodiment will be explained.Load sensor S. The shift load M detected by the shift pedal 12
When the predetermined value Mtu or more is reached in response to the shift operation, the control unit 36 starts controlling the output of the engine 1, thereby starting the shift operation at the speed change filO.

If the driver unconsciously places his or her foot on the shift pedal 12 when the zero point correction of the shift load M is not performed, the 31st! The shift load M increases as shown by the chain line in FIG. 1 output control is executed, there is a possibility that the actual shift operation in the transmission 10 and the output control timing of the engine 1 will deviate from each other. However, when the zero point correction of the shift load M is performed according to the present invention, the third! ! As shown by the solid line 1, when the foot is simply placed on the shift pedal 12, the increase in the shift load M is suppressed, and when the shift load M increases as the shift operation is actually performed, the shift operation is I decided it was done and went to the 4th T! Output control of the engine 1 is executed as shown by the solid line gJ.

Therefore, it is possible to control the output of the engine 1 in accordance with the shift operation timing of the transmission lO, and deterioration of the shift feeling can be avoided.

FIG. 6 shows a modified example of the load sensor, in which a load sensor S is installed at the intermediate portion of the link 34 in the shift device 13.
1' may be provided so that a tensile load is detected as the shift load M during an upshift operation, and a compressive load is detected as the shift load M during a downshift operation.

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.

C8 Effects of the Invention As described above, according to the method of the present invention, the shift load acting on the shift operation member is detected, and the shift load is zero-point corrected by using the temporal average value of the shift load as an offset value. It is determined that one shift operation has been performed when the shift load of the shift member exceeds a predetermined value, so even if the driver unconsciously applies a load to the shift member,
It is possible to improve the shift feeling without erroneously determining that a shift operation has been performed.

[Brief explanation of the drawing]

Figures 1 and 5 show an embodiment of the present invention, in which Figure 1 is an overall configuration diagram, Figure 2 is a longitudinal sectional view of the transmission, and Figure 3 shows changes in shift load. Figure 4 is a diagram showing the ignition timing control timing corresponding to the change in shift load in Figure 3, Figure 5 is a flowchart showing the shift load correction processing procedure, and Figure 6 is a modification of the load sensor. FIG. 2 is an overall configuration diagram corresponding to FIG. 10...Transmission, 12...26...Sick as a shift operation member

Claims (1)

[Claims] A transmission (10) mounted on a vehicle has a shifter (24-26) interlocked and connected to a shift operation member (12) to alternatively establish a gear train (20_1-20_6) of a plurality of gears. ) in a shift operation detection method for a vehicle transmission for detecting that a shift operation has been performed by the shift operation member (12), in which a shift load acting on the shift operation member (12) is detected. At the same time, the shift load is zero-point corrected using the temporal average value of the shift load as an offset value, and it is determined that a shift operation has been performed when the corrected shift load becomes a predetermined value or more. Transmission shift operation detection method.