JPS6159051A - Speed change controller of auxiliary transmission - Google Patents

Abstract

PURPOSE:To secure correct gear change even when a clutch pedal is erroneously operated by cancelling a gear change command if the clutch operation is not carried out within a specific time after the gear change command is issued from a speed change control signal generator. CONSTITUTION:The output from a detection means 26 for a gear position in the direction of speed change in a transmission is supplied to a speed change control signal generator 16. If a clutch pedal is stepped-in at an optional point of time t2 within a prescribed period of time T1 after generation of a speed change command pulse, a detection signal is given from a clutch switch 12. However, if no output signal is given within said period of time T1, the speed change command is cancelled. Therefore, if the clutch operation is not carried on continuously within a prescribed time after generation of the speed change command, an auxiliary transmission is not switched even though the clutch is operated, possibly allowing no erroneous operation to take place.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a shift control device for an auxiliary transmission that performs shift control by being energized by clutch pedal operation after a shift command is generated.

[Background technology]

Some vehicles are equipped with an auxiliary transmission in order to reduce fuel consumption and engine noise.

This sub-transmission is installed on the input side or output side of the main transmission included in the transmission unit, and is located on the high speed side (economy side E) and the low speed side (economy side E).
・It performs two-stage switching with <war side P).

In the conventional sub-transmission switching control method, first, a switching switch notch for generating a gear shift command provided in the driver's seat 111 is operated.
Next, when the clutch pedal is operated, command signals output based on each of these operations are received L7'C? A shift control signal generator composed of a microcomputer or the like sends a shift control signal to the auxiliary transmission to drive the actuator.

Driven by this actuator, the gear of the auxiliary transmission is switched from the economy side to the power side, or from the lower side to the economy side.

However, in the above conventional method, after operating the switch switch,
The driver is distracted by other driving operations, such as dealing with another situation, and forgets a series of switching operations, and then depresses the clutch pedal that should be operated in succession to start switching control of the auxiliary transmission. If left unattended, the following problems would occur.

That is, the next time the clutch pedal is operated in an attempt to switch the main transmission, the pending and unintended switching operation of the auxiliary transmission will occur. Therefore, in order to return to the original state, the switching operation must be performed again, which can be cumbersome.

[Purpose of the invention]

In consideration of the above fact, the present invention accepts as a normal switching operation only when the operation of the shift command generator and the clutch pedal are performed consecutively, so that it is possible to forget to operate the clutch pedal after operating the shift command generator. It is an object of the present invention to provide a speed change control device for an auxiliary transmission that does not cause erroneous operation.

[Structure of the invention]

In the speed change control device for the sub-transmission according to the present invention, when the clutch pedal is operated within a predetermined time after the speed change command is generated by the speed change command generator, the speed change control signal generator activates the speed change control signal No. 3'. 2: Occurs, and on the other hand, if the clutch pedal is not operated within a predetermined time after the shift command is issued, the shift command is released.

Therefore, if the clutch is not operated continuously within a predetermined time after a shift command is generated, the sub-transmission will not change even if the clutch is operated after that, and if the shift command generator is operated. Since a new shift command can be issued, there is no risk of erroneous operation and safety is increased.

[Embodiments of the invention]

Embodiments of the apparatus according to the present invention will be described below based on the drawings.

FIG. 1 shows a first embodiment of the device according to the present invention, in which depression of a clutch pedal 10 is detected by a clutch switch 12 consisting of a switch.

In addition, the mode selector switch 14 that generates the gear change command is
・A momentary switch that is turned off when left unattended and turned on when operated, and generates a gear shift command when turned on.

The detection signal of the clutch switch 12 and the mode changeover switch 140 command are supplied to the shift control signal generator 16, and the shift control signal obtained from the shift control signal generator 16 is supplied to the actuator 18.

When a shift command is supplied by operating the shift control signal generator 16f'i and the changeover switch 14, gear shift preparation is set internally, and a clutch operation detection signal is supplied within a predetermined time after the shift command is generated. If the clutch is not operated within a predetermined time and no detection signal is supplied, the preparatory setting based on the shift command is canceled.

Therefore, even if you are distracted by other driving operations after operating the changeover switch 14 and do not press the clutch pedal 10 as part of a series of changeover operations, the shift command by the changeover switch 14 will be canceled. Since the state is returned to the state before operating the changeover switch 14, even if the clutch is operated to change the main transmission afterwards, the auxiliary transmission will not be changed inadvertently, and the changeover switch 14
If you operate , it will be accepted as a new regular gear shift command, which will reduce the risk of erroneous operation, improving operability and safety for the driver.

The actuator 18 is included in a speed change operating device that performs a speed change operation, and the speed change sleeve 22 is operated by driving the shaft 20 in response to a speed change control signal.

The shift sleeve 22Vi is operated by the actuator 18 to change the gear of the sub-transmission (not shown). Note that, as described above, this sub-transmission is provided on the input side or the output side of the main transmission included in the transmission unit 24, and performs two-stage switching between the economy side E and the power side P. In addition, 64 is a buzzer, 66 is fJ (p1 control circuit), 70 and 72Vi display lamp, 68 is its n4 city 11
It is a control circuit. These buzzer 64, indicator lamp 70
．． 72 indicates the economy side or power side mode state of the auxiliary transmission, or the fact that a gear shift operation is in progress.

Actuator 18 may be configured as shown in FIG. This actuator 18 is provided with an air actuator 28, which is connected to a diaphragm 30 of which drives the lever 20.
is manipulated.

First air chambers 3 formed on both sides of the diaphragm 30
4. The second air chamber 36 is a solenoid valve 38 as a switching drive @ device.
．． 40 pressure regulating ports, and these solenoid valves 38.4
The low pressure port 0 is connected to a negative pressure source 46 via a surge tank 42 and a check valve 44 . Each high pressure port is also opened to the atmosphere via a filter 48,50.

Further, energization of the solenoids 52 and 54 of the electromagnetic valves 38 and 40 is controlled by a control signal output from the speed change control signal generator 16.

By energizing the solenoid 52, negative pressure is introduced to the first air chamber 34 side, and by energizing the solenoid 54, negative pressure is introduced to the second air chamber 36 side. Therefore, by energizing the solenoid 52, negative pressure is introduced to the power side P and to the solenoid 54. The auxiliary transmission is operated to shift to the economy side E by energizing.

As will be described later, when the device is operating normally, one of the solenoids 52 and 54 is always energized, and even after gear switching is completed, the diaphragm 30 remains on the P side or the E side. is biased to prevent the gear from slipping out.

In the device according to the present invention, as shown in FIG. 1, a detection means 26 for detecting the gear change direction of the auxiliary transmission, that is, the current position of the gear, is provided in association with the gear shift sleeve 22 in this example, The detection output of this detection means 26 is supplied to the speed change control signal generator 16.

As an example of the detection means 26 is shown in FIG. 3, the detection means 26 is mounted at a predetermined interval at a position where it contacts a cam 56 provided in association with the transmission sleeve 22 and a top portion 58 of this cam 56. a pair of switches S W p ,
When the switch SWp is in the neutral position just before the end of switching to the power E side, the switch SWp is turned on, and on the other hand, when the switch SWp is in the neutral position just before the end of switching to the economy E side, the other switch is turned on. SWE is now turned on. These pair of switches S
Wp.

The SWH signal is used as a detection output of the detection means 26.

These switches SWp and SWg are used to detect that the auxiliary transmission is about to end the gear switching operation during the switching operation, and to control the buzzer 64 and the indicator lamps 70 and 72.

t7'c, Immediately after turning on the ignition switch (IGS/W), turn on one switch SWp and SWE to check whether the gear position before starting operation is power side or economy side. It also has a function of initializing the speed change setting mode of the speed change control signal generator 16 (switched by a speed change command) to match the current position of the gear.

As a result, even if the clutch pedal 10 is operated at the start of driving, there will be no unintentional shifting of gears in the auxiliary transmission, and driving can be started in the same mode as the previous driving without any unnecessary switching operations. You can get the ease of use that you can do.

Please note that when starting the engine, the gear may be in the neutral state for some reason, or the switches SWP and SW may be in the neutral state.
If E is malfunctioning and both are on or off, the shift control signal generator 16λ generates a shift control signal that energizes the solenoid 54 and switches the gear to the power side.

This eliminates the inability to start at the start of driving, enables accurate gear positioning and reliable gear shifting, and allows for easy starting without damaging the clutch even when the weight of the vehicle is large. It is.

FIG. 4 shows an example of a speed change control device including a speed change control signal generator 16, in which the speed change control signal generator 16 has a microcomputer 16A, a selector switch 14, a clutch switch 12, and a pair of detection switches SWP, SWE. are connected to the input ports of the microcomputer 16A via inverters 62A to 62D, respectively, and each detection signal is supplied to the microcomputer 16A.

On the other hand, the output port of microcomputer 16A has
The solenoids 52 and 54, a buzzer drive control circuit 66, and a buzzer drive control circuit 68 are connected, and necessary control signals are sent to each of them.

The microcomputer 16A has an interrupt processing function, and is connected to a hard timer (not shown) that is started under the control of the microcomputer 16A and generates an interrupt when the timer expires.

The microcomputer 16A has a function of controlling the overall shift control of the sub-transmission according to a predetermined procedure based on a program stored in the memory, and performs flag processing to check various states.

After performing a predetermined initial setting operation when the engine is started, the microcomputer 1.6 A prepares the mode for the switching direction when a shift command is supplied by operating the changeover switch 14, and then performs a predetermined mode after the shift command is generated. Clutch pedal 1 within the gap
When the pedal o is depressed, this detection signal sends a control signal to the solenoid 52 or V'i 54 on the setting mode side to start energizing it.

When this solenoid 52 or 54 starts to be energized, the gears are switched and driven. Once one of the solenoid 52 or 54 is atomized in this way, the shift control signal output continues until the clutch pedal 10 is operated in the next switching operation, and the energized state is maintained during this time.

Therefore, during a shifting operation, even if the clutch pedal 1o is released while the auxiliary transmission is still in the neutral state, the solenoid 52 or 54 will continue to be energized, thereby ensuring that the auxiliary transmission gear is completely and reliably in the economy or power position. switched to the side. Furthermore, since the excitation is continued even after the gear change is completed, there is no possibility that the gear will fall out during abuse.

By the way, in this embodiment, disconnection detectors 74 and 76 made of resistors are provided in series with the solenoid 52 or C54.
This detection signal is supplied to the microcontroller 16A via the input port.

Before performing the switching operation, the microcontroller 16Afl checks continuity by checking the presence or absence of a detection signal by connecting the solenoid 52 or 54 of the switching 11111 to the tank connection 7 (r).
Therefore, 1) Switching is performed only when 11°i does not occur.

Therefore, if the gear is currently on the normal side and the side to be switched is faulty, the energization will not be switched to the faulty side and the solenoid 52 or 54 on the normal side will continue to be energized, causing the gear to drop out. There is no problem, and since the switching is performed only when the switching side is normal, reliable gear shifting can always be performed.

Further, the microcomputer 16A further generates a buzzer control signal to control the buzzer 64.
The solenoid 52 or f'i5'4 is supplied to the collateral circuit 66.
The buzzer 64 is driven from the start of excitation switching until the switching operation is completed.

The buzzer 64 is for notifying the driver that the sub-transmission is in the process of shifting. Further, the power side display lamp 70 turns on and off the economy side display lamp 72 via the microcomputer 113A fly drive circuit 68.

This will cause the corresponding lamp to blink until the switching operation is completed after the switching operation is started, and then only the display lamp corresponding to the current mode will be lit until the switching operation is started, and the mode to the power side or economy side will be turned on. This is to inform the driver F of the current mode being switched and the current mode switched.

A normal switching operation of the shift control device configured as described above will be outlined with reference to FIG. 5. The figure is a time chart of the switching operation from the economy side to the power side, and shows time points 1.
Mode changeover switch (moment switch used) 1
4, the command pulse (mode switching pulse) shown in FIG. 5A is generated and the power side mode is set. As a result of this, the power side switching indicator lamp 72 blinks for a period T (FIG. 3B).

When the clutch pedal 10 is depressed at any point t2 within a predetermined interval T after the command pulse is generated, a detection signal (clutch pulse) from the clutch switch 12 (D
) is obtained, and at the rising timing, a shift control signal is output to the solenoid 54 and energization is performed (E in the same figure), so that the gear transfers power from the economy E side through the neutral position N as shown in G in the same figure. Switched to P side.

Furthermore, the output of the speed change control signal is stopped at the rise timing of the detection signal of the clutch 12, and the electricity supply to the economy side sonoid 52 is stopped. Also, at this time, the economy side indicator lamp 70 is turned off.

Since the cam 56 shown in FIG. 3 moves with this switching operation, when the cam 56 just passes through the neutral position N, the cam 56
6, the power side detection switch S'vV p is turned on (same figure), and from this on bet point t3 to 1'I [constant a
At time point L4 after elapse of k interval r, the power side switching display lap 72 is turned on.

The buzzer sounds for a period from time t2 to L4 as shown in FIG.

The switching operation to the economy side is also the same as described above, so a description thereof will be omitted.

Next, the above control operation will be explained in detail according to the flowchart shown in FIG. 6.7. FIG. 7 (N~0 indicates interrupt processing. For example, (step 100) V'1 (100
). In the flowchart, the power side detection switch is set to P detection S/W, and the economy side detection switch is set to E detection S/W1. : Turn the power side switching solenoid to P.S.
QL, economy side switching solenoid is ESOL, power side display is P lamp, economy side display lamp is E
It is abbreviated as a lamp.

As shown in FIG. 6, wait until the ignition switch is turned on (10(1)) Initial operation is performed.

That is, in step 102, the RAM work area is initialized and each flag C, D, F, G, H and T1 is set.
．． T2. After setting T3 to O, moxibustion output switch SWE, S
Check WP104゜106.108), and if the gear is in the economy side and only the detection switch SWE is on, F related to the gear position is set to F-, 0, and the economy side noid 52 is energized and the economy side display is performed. The lamp 70 is turned on (110).

Conversely, the gear is on the power side and the detection switch SWp
If only is off, set F=l, energize the power side solenoid 54, and light up the power side indicator lamp 72 (
112).

Through the above operations, the current mode of the gear before the start of operation matches the set mode.

When the detection switches SWg and SWp are both off or off (including when the gear is in the neutral state), flags C, D, F, and H-1 are set (114), and the power side solenoid 54 is energized in the next flow to shift the gear. is switched to the power side, and the power side display lamp 72 is blinked to indicate to the driver that the switch is scheduled to be switched to the power side (116).

Next, the detection switch S W E is turned on when the engine starts l-H.
.

When both SWPs are off or not off, initially they are p, c, 0 due to the initialization, so steps 118, 120, and 122 are repeated until they become M-1.

Here, the flag M is set to M-, 1 when the interrupt occurs at the rising edge when the mode selector switch 14 is turned on (FIG. 7G).
)208). If it is determined to be M-1 in step 120, it is initially r1-0 due to the initialization of the stepper, so when the mode selector switch 14 is turned off, timer T1 starts (124.x21°) Then timer T! starts. A flag T indicating that the timer T is in operation is set (128). At this time, a flag G is set to 1 in order to perform processing when the clutch is not operated while the timer T is started (130).

Next, in order to invert and memorize the current mode state before switching, the flag F is checked (132), and in the case of F-0, the flag F is set to i and the P display lamp 72 is blinked (138, 140). -1, the flag is set to F-0 and the E display lamp 70 blinks (134, 1
36).

That is, when the mode selector switch 14 is turned off, the lamp 70 or 72 starts blinking.

As shown in the seventh diagram, after the flag C is marked M,
That is, the interrupt is set at the rising edge when the clutch switch 12 is turned off after the mode changeover switch 14 is briefly turned on (2in, 212). Therefore, even if the mode changeover switch is turned off, if the clutch switch is not turned off, the state remains C-0, and the process returns to step 120 (142). In this case, if the timer T1 times up without any clutch operation, as shown in FIG.
When an interrupt occurs, flags T1 and M are reset as shown in FIG. Then, since it is G-1 (122), step 30
Through the processing of steps 0 to 310, the flag F is returned to the current mode state, and the display lamp 70 or 72 is returned to its blinking or original state. And it is set as G-0. That is,
Even if the mode selector switch 14 is turned off, if the clutch switch 12 is not turned off within a certain period of time, the mode selector switch 1
4 on will be ignored.

If the clutch switch 12 is turned on before the timer T1 times up, the process goes from step 124 to step 142, and then when switching from F-1, that is, the economy side to the power side, it is checked whether or not there is a failure in the power side solenoid 58. (144, 146). When solenoid 54 is normal, power side solenoid 5+ is turned on/off.
・Economy side sovnoid 54 and E display ranoff 70
is turned off and the buzzer 64 sounds at a high pitch (148).

Contrary to the above, if F=Q, economy side sov node 5
If the solenoid is normal, the economy side solenoid 52 is turned on, the power side solenoid 52 and the P display button 72 are turned off, and the buzzer 64 is sounded at low and high pitches (152).

If the power side solenoid 5 is faulty in step 146, the solenoid 5 is not allowed to pass. That is, since it is H-0 during driving, the flag F is cleared to return to the current mode, and then the P display lamp 72 is turned off to stop blinking (154, 156, 158). Finally, flags C1G and M are cleared (16Q) and the process returns to step 120.

On the other hand, when the engine is started, the detection switch SWE,
If both SWPs are off or on, C, D, F-
1, so if step 142 is reached from step 118 and solenoid 5 is normal, step 18 is performed and the gear is switched to the power side, but step 1
If a failure is determined in step 46, H-1 is cleared and the process goes to step 160 (162). At this time, F=l remains, so in the next switching operation, 7
The lugs will be reversed and switched to the economy side.

On the other hand, when the economy side V-noid 52 is out of order in step 150, the solenoid 5z is not energized. Then, after inverting the flag F and returning it to the current mode as F-1, turn off the E indicator lamp 7° and stop blinking (
163, 164).

In the process of steps 148 and 152, the switching operation is performed by turning on the solenoid 54 or Vi 52.

Subsequently, timer °T2 is started (166, 1fi8
), flag T2 is set (170, 172). This shows that timer T2 of 7 lags T2 is being activated. This timer T2 is connected to the detection switch SWp or SWE.
This is to allow sufficient time to complete the switching operation, and then switch the indicator lamps 70, 72 and the buzzer 64 when the display lamps 70 and 72 are out of order.

After setting the T2 flag, solenoid 52 or 54
When the mode switching DJh operation is turned on, the power detection switch SWp is turned on while switching to the power side, or the economy detection switch SWE is turned on while switching to the economy side, steps 174 or 176 to 178, 1
After passing through 80, it moves to 182. Timer T3 is started (18
2), flag T3 is set (184). here 7
Lag T3 'd Indicates that timer T3 is being activated.

When the timer T3 (set time r1, for example, 0.2 seconds) times up, an interrupt occurs and the flag T3 is reset (206) as shown in FIG. 7(B).

Then, moving from step 186 to step 188, the power:tn1 display 72, which was blinking during switching to the power side, is lit and the buzzer 64 is turned off (190).
. When switching to economy mode, the economy side solenoid 52 is turned off, the economy side display lamp 7o, which was blinking, is turned on, and the buzzer 64 is turned off (1
92). Then flags C, G, and M are reset (16
0), the process returns to step 120 to perform the above-mentioned processes for the next mode switching operation.

Note that in step 174 or 176 described above, the solenoid 52
Or even if the sufficient time T2 required for the switching operation has elapsed after 54 is switched 1〆a, the detection switch SWp or SW
If E is not turned on, or the detection switch SWp or Vis
wE is on, but the other detection switch SWn or ij S
If Wp is also on (178, 180), an interrupt occurs when the timer Tz times up ((c) in Figure 7).
Wait until flag T2 is reset as shown in (2)
14,196°198), the process moves to step 186.

Thereby, even if the detection switch fails, gear switching can be performed reliably.

In this second embodiment, the mode changeover switch 14 and the clutch switch 12 are made up of a mome/tally switch, so that they are easier to operate.

〔Effect of the invention〕

As described above, according to the shift control device for a sub-transmission according to the present invention, a shift control signal is generated when the clutch pedal is operated within a predetermined time after the shift command is generated by the shift command generator. The device generates a shift control signal, and if the clutch pedal is not operated within a predetermined time after the shift command is generated, the shift command is released. If the clutch is not operated continuously within the specified time, the auxiliary transmission will not change even if the clutch is operated after that, and a new shift command can be issued by operating the shift command generator. This has an excellent effect in that there is no risk of erroneous operation and safety is increased.

[Brief explanation of drawings]

Fig. 1 is a system diagram of the main parts of the device of the present invention, Fig. 2 is a configuration diagram of the actuator, Fig. 3 is an explanatory diagram of the gear change switching direction detection means, and Fig. 4 shows an example of the main parts of the gear change control device. System diagram,
Figure 5 is a time chart for explaining its operation, and Figure 5A.
, FIG. 6B, and FIG. 7 are examples of flowcharts for explaining the operation. DESCRIPTION OF SYMBOLS 12... Clutch switch, 14...-Mode changeover switch, 1G... Shift control signal generator, 18... Actuator, 22... Shift sleeve, 26... Switching direction detection means, 52.54 ···solenoid. Agent Patent Attorney Atsushi Nakajima Figure 1 Figure 4 Fake (A) (C) (E) (B) (D)

Claims (1)

[Claims] A shift command generator that generates a shift command; a clutch operation detector that detects clutch pedal operation; a shift control signal generator that receives the shift command and clutch operation detection signal; It has an auxiliary transmission that switches between a gear and a low-speed gear, and the shift control signal generator controls the shift according to the shift command when the clutch is operated within a predetermined time after the shift command is generated. 1. A shift control device for an auxiliary transmission, characterized in that the shift control device generates a signal and releases a shift command if a clutch operation is not performed within the predetermined time period.