JPH02133247A - Drive control device for vehicle - Google Patents

Abstract

PURPOSE:To prevent unexpected reversing by stopping an engine when a forward-reverse selecting lever is switched to a reversing side without applying a brake, in the case of a vehicle enabling forward-reverse running to be selected by controlling the lever. CONSTITUTION:In the case of a device provided in a vehicle selecting forward- reverse running by controlling a forward-reverse selecting lever, when it is selected to a reversing position without gripping a rear brake lever (brake switch in off-condition), an engine stopping means 100 operates making a CDI ignition device 50 inoperative, and an engine is stopped impeding unexpected reversing of the vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a drive control device for a vehicle capable of moving forward and backward.

(Prior art) Some vehicles of this type include a forward transmission system that transmits the engine output to the drive wheels through a manual transmission clutch, a main transmission, a forward/reverse switching clutch, Are there any vehicles that have a forward/reverse switching clutch and a reverse transmission system that bypasses the main transmission from the main transmission clutch and transmits information to the drive wheels?・If the reverse selector clutch is in the reverse position.

It is possible to go backwards. Therefore, while the engine is running.

In addition, when the main transmission is in the neutral position and the vehicle is stopped, if you switch the forward/reverse selector clutch to the reverse side with the gear shift clutch connected, if the low-speed torque of the engine is large, , the vehicle may start moving backwards, which is undesirable.

Therefore, in such a vehicle, when the forward/reverse selector clutch is switched to the reverse side with the gear change clutch in the engaged state as described above, the control device is equipped with an engine stop means that detects this operation and stops the engine. The applicant had previously proposed this (Japanese Patent Application No. 168621/1982).

(Problem to be solved by the invention) By the way, vehicles that can move forward and backward have a centrifugal clutch instead of a manual gear shifting clutch in their power transmission system, or a V-belt automatic transmission with a centrifugal clutch. Even if such a vehicle has one, when the forward/reverse selector lever is moved forward or from the neutral position to the reverse position, if the engine speed is high, the centrifugal clutch is connected and the vehicle moves backward. Sometimes.

However, the control device proposed above cannot be directly applied to such vehicles.

The present invention has been made in view of the above circumstances, and its purpose is to be applicable to all vehicles capable of moving forward or backward, and to enable the vehicle to move backward even under the above circumstances. An object of the present invention is to provide a vehicle drive control device that can reliably prevent this.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a vehicle in which forward/reverse travel is selected by operating a forward/reverse selector lever, in which the forward/reverse selector lever is used to move backward without applying the brakes. The vehicle drive control device is characterized in that the vehicle drive control device includes an engine stop means that stops the engine when the engine is switched to the side.

(Function) According to the present invention, since it is impossible to go backward unless the brake is applied when switching the forward/backward switching lever to the reverse side, the vehicle does not start going backward unexpectedly. If you accidentally switch the forward/reverse selector lever to the reverse side without applying the brakes, the engine will be stopped by the engine stop means, so the vehicle will not be able to go backwards, and this will prevent it from going backwards unexpectedly. It can't happen.

Therefore, the drive control device according to the present invention can be applied to a transmission clutch, a centrifugal clutch, a V clutch, regardless of the type of drive transmission system of a vehicle.
It is applicable to any vehicle having a belt-type automatic transmission or the like.

This drive control device requires that the brake be applied when the forward/reverse selector lever is switched to the reverse side for the engine to operate; otherwise, the engine will be stopped. Therefore, even if the brake is applied while the vehicle is moving backwards, or the brake is released when the forward/reverse selector lever is in the reverse position, the engine will still be running.

(Example) An example of the present invention will be described below based on the accompanying drawings.

FIG. 1 is an electric circuit diagram of a drive control device according to the present invention, and FIG.
The figure is a cutaway plan view of the engine of a vehicle equipped with the same drive control device, and FIGS. 3 and 4 are a side view and a plan view, respectively, of the same vehicle.

First, the general structure of the vehicle 1 will be explained based on FIGS. 3 and 4. The vehicle 1 is a four-wheel vehicle for traveling on rough terrain that can move forward and backward, and the front end of the body frame 2, A pair of left and right wide front wheels 3.3 and rear wheels 4, 4 are rotatably supported at the rear end.

Furthermore, two left and right lower tubes 2a are located between the front wheels 3, 3 and the rear wheels 4, 4 and constitute the vehicle body frame 2.
, 2a) is equipped with an engine 5, and an intake pipe 8 is connected to the cylinder 6 of the engine 5 via an air cleaner and a carburetor 7 (not shown).
A muffler lO is connected to the exhaust pipe 9 led out from the exhaust pipe 9. A forward/reverse switching lever 40 that tilts back and forth is provided on the side of the engine 3.

Furthermore, there is a bar handle 11. A fuel tank 12 is arranged, and a seat 13 is arranged behind the fuel tank 12. A rear brake lever 14 and a front brake lever 15 are provided at the left and right ends of the bar handle 11, respectively.
4.15 is the front wheel 3.3. by holding the driver or each of these. This applies a brake to the rotation of the rear wheels 4,4.

Here, the details of the configuration of the engine 5 will be explained based on FIG. 2.

As shown in the figure, a crankshaft 17 that is long in the vehicle width direction is located at the front inside the engine case 16 provided at the bottom of the cylinder 6.
The crankshaft 1 is rotatably supported and arranged.
A large end portion of a connecting rod 18 is connected to the middle portion of the connecting rod 7 . The small end of the connecting rod 18 is connected to a piston 19 that slides inside the cylinder 6, and a spark plug 20 is screwed into the cylinder 6 to ignite and burn the air-fuel mixture in the cylinder combustion chamber compressed by the piston 19. It is worn.

Further, a generator 51 is attached to one end of the crankshaft 17, and a driving pulley 23 of a belt type automatic transmission 22 is attached to the other end.

On the other hand, in the rear part of the engine case 16, a driven shaft 24, an intermediate shaft 25, a reverse shaft 26, and an output shaft 27 are rotatably supported and housed in parallel with the crankshaft 17, and one end of the driven shaft 24 is supported. A driven pulley 28 is attached to the drive pulley 28, and a small diameter gear 29 is integrally formed at the other end. still.

The belt-type automatic transmission 22 is constructed by winding a V-belt 30 between the driving pulley 23 and the driven pulley 28, as is well known.
) The winding diameter of the V-belt 30 on both pulleys 23.2B is changed based on centrifugal force according to the rotational speed of the crankshaft 17, and the rotation speed of the crankshaft 17 is automatically changed.
It is intended to be communicated to the public.

Furthermore, a gear 31 and a reverse gear 32 are disposed on the intermediate shaft 25.
are arranged to be freely rotatable, and the reverse shaft 26
Gears 33 and 34 of different diameters are connected to each other. The gears 31 and 33 are always in mesh with the gear 29, and the reverse gear 32 is always in mesh with the gear .

Furthermore, a shifter 35 is spline-fitted between the gear 31 and the reverse gear 32 of the intermediate shaft 25 so as to be slidable in the axial direction.
A shift fork 37 that slides in the axial direction on the shaft 36 in conjunction with the rotational operation of the reverse switching lever 40 is engaged. The shifter 35 is slid on the intermediate shaft 25 by the shift fork 37, and can be selectively engaged with the gear 31 or the reverse gear 32.

Further, a small diameter gear 38 is integrally formed at the other end of the intermediate shaft 25, and the gear 38 meshes with a gear 39 formed at one end of the output shaft 27. A sprocket 41 is connected to the other end of the output shaft 27 extending outside the engine case 16, and as shown in FIGS. 3 and 4, the sprocket 41 is connected to the rear axle 42. A drive chain 44 is wound between the sprocket 43 and the sprocket 43 .

However, in the vehicle l according to the present embodiment, the forward/reverse switching lever 40 was switched to the reverse side without applying the brake (in this embodiment, without gripping the rear brake lever 14) while the engine 5 was operating. In this case, a drive control device having an engine stop means for stopping the engine 5 is provided, and the electric circuit configuration of this drive control device will be explained based on FIG.

In FIG. 1, 50 is a known CDI ignition system, which includes a generator 51, and when the engine 5 is operating, a positive half wave generated in the charging coil 52 of the generator 51 passes through a diode 53. Charge capacitor 54 to the polarity shown.

On the other hand, when the thyristor 56 is closed by the ignition pulse output from the pulsar coil 55 of the generator 51, the electric power charged in the capacitor 54 is discharged, and this discharged current flows to the primary coil 57a of the ignition coil 57. , a high voltage is generated in the secondary coil 57b, and a spark flies to the spark plug 20. Note that the diode 58 short-circuits the negative half wave of the charging coil 52.

Further, in FIG. 1, 60 and 70 are a selector switch and a neutral switch that are interlocked with each other, and the selector switch 60 is closed when the forward/reverse selector lever 40 is in the neutral position (N) and the forward position (F). ,
The neutral switch 70 closes and lights the neutral lamp 71 only when the forward/reverse switching lever 40 is in the neutral position (N). Furthermore, in Figure 1, 8
0 is a flake switch, which is closed when the rear brake lever 14 (see FIG. 4) is squeezed to apply the rear brake (ON).

On the other hand, in FIG. 1, reference numeral 90 denotes a starting system for the engine 5, which includes a starter motor 91, to which the voltage of a battery 92 is supplied via a starter relay 93 at °C.

In FIG. 1, 94 is a main switch, 95 is a starter switch, and 96 is a relay.

By the way, in FIG. 1, 100 is the engine stop means provided in the drive control device according to the present invention, which is an NPN transistor for discharging the positive half wave of the charging coil 52 via a diode 101. 102, a thyristor 103 for controlling the base voltage V (B) of the transistor 102, a transistor 104 for inverting the signal from the brake switch 80 and applying it to the gate of the thyristor 103, and a thyristor 105.
It consists of: Note that the resistor 106 forms a bias circuit that applies the base voltage V(B) to the transistor 102.

Thus, the voltage of the battery 92 is applied to the anode of the thyristor 105 via the main switch 94, the starter switch 95, and the coil of the relay 96, and is also applied to the base of the transistor 102 via the main switch 94 and the resistor 107. be done. Also, thyristor 1
The cathode of the transistor 05 is grounded via the brake switch 80, grounded via the diode 108 and the neutral switch 70, and connected to the base of the transistor 104. Furthermore, a divided voltage obtained by dividing the anode voltage of the thyristor 105 by voltage dividing resistors 109 and 110 is applied to the gate of the thyristor 105. The gate of this thyristor 105 is connected to the collector of the transistor 102 via a diode 111.

Next, the operation of this drive control device will be explained.

In this embodiment, when the forward/reverse switching lever 40 is in the forward position (F) or the neutral position 1 (N) and the selector switch 60 is closed, or when the rear brake lever 14 is gripped and the rear brake is When the brake switch 80 is in the ON position and the circuit is closed, the cathode of the thyristor 105 is grounded.

Therefore, even if the engine 5 is started in the above direction, the vehicle l will not move forward, and if the main switch 94 is set to ONL and the starter switch 95 is turned on at this time, the thyristor 105 will be activated. The circuit is closed, and the relays 93 and 96 are also closed to start the starter motor 91. or,
In this case, the base voltage V(B
) is kept at ground potential, and the transistor 102 is always O.
Since the engine becomes FF, the engine stop means 100 becomes inactive and the CDI ignition device 50 operates.

Engine 5 can now be started.

For example, the forward/reverse switching lever 40 is in the neutral position (
N), that is, in a state in which the shifter 35 shown in FIG. When the rotation speed reaches a certain value or more.

The rotation of the crankshaft 17 is changed in speed by a V-belt type automatic transmission 22 and transmitted to a driven shaft 24.

The driven shaft 24 is rotated. The rotation of the driven shaft 24 is transmitted to the gear 31 via the gear 29, and the gear 31 is idled on the intermediate shaft 25, so the intermediate shaft 25 is not rotationally driven and the vehicle l is not started.

At this point, the forward/reverse switching lever 40 is moved to the forward position (F
), the shifter 35 is engaged with the gear 31, so the rotation of the gear 31 is transmitted to the intermediate shaft 25 via the shifter 35, and the intermediate shaft 25 is rotationally driven. The rotation of this intermediate shaft 25 is controlled by gears 38, 39, output shaft 27. The signal is transmitted to the rear wheel 4.4 via the sprocket 41, drive chain 44, sprocket 43, and rear axle 42, and the rear wheel 4.4 is rotationally driven to move the vehicle l forward.

However, when the forward/reverse switching lever 40 is in the forward position (F) or the neutral position (N) and the selector switch 60 and neutral switch shown in FIG. If you switch the forward/reverse selector lever 40 to the reverse position (R) without gripping it (that is, with the brake switch 80 in the OFF state), the selector switch 60 and neutral switch 70 will both move to the R position and open. , the base voltage V (B) of the transistor 102 becomes high potential and the transistor 102 becomes ONL/, and as a result, the engine stop means 100 is activated and the charging coil 52 of the generator 51 is activated.
The positive half-wave generated at is discharged through transistor 102. Therefore, the CDI ignition device 50 is deactivated, the engine 5 is stopped, and the vehicle 1 is prevented from moving backward.

In contrast to the above, the state in which the rear brake lever 14 is gripped (
That is, even if the forward/reverse selector lever 40 is switched to the reverse position (R) with the brake switch 80 in the ON state, if the brake switch 80 is in the ON state (closed circuit state), the gate voltage of the transistor 102 V (G ) becomes a high potential and the thyristor 103 or ONL/, transistor 102
is turned off, the engine stop means 100 is deactivated, the CDI ignition device 50 remains activated, and the engine 5 continues to operate. In this case, since the rear brake is applied by gripping the rear brake lever 14, the vehicle 1 does not move backward.

When the rear brake lever 14 is released in the above state, the brake switch 80 opens at 0FFL/.However, the thyristor 103, which has been in the ON state until now, remains in the ON state unless its anode is grounded, so the transistor 102 The base voltage V(B) is kept at the ground potential and the transistor 102 is kept in the OFF state. Therefore, the engine stop means 100 also remains inactive, the CDI ignition device 50 also continues to operate, the engine 5 remains in the operating state, and the vehicle 1 is driven backward. That is, the forward/reverse switching lever 4
0 to the reverse position (R), the shifter 35 shown in FIG. (-The rotation engaged with the gear 32 and transmitted to the driven shaft 24 is transmitted to the intermediate shaft 25 via the gears 29, 33, the reverse shaft 29, the gear 34, the reverse gear 32, and the shifter 35, It will be reversed.

The rotation of the intermediate shaft 25 is transmitted to the rear wheels 4, 4 via the gears 38, 39, the output shaft 27, the sprocket 41, the drive chain 44, the sprocket 43, and the rear center shaft 42, as in the case of forward movement. The rear wheels 4.4 are reversed and the vehicle 1 moves backward.

Furthermore, while the vehicle l is moving backwards (at this time, the selector switch 6
0 and neutral switch 70 are both in the R position,
Even if the rear brake lever 14 is gripped to apply the rear brake when the brake switch 80 is in the OFF state, the brake switch 80 is in the ON state and closed, so the transistor 102 remains in the OFF state and the engine stop means lOO The engine 5 also remains inactive, so the engine 5 is not stopped midway.

In the above embodiments, the present invention is particularly applied to a vehicle having a belt-type automatic transmission in the power transmission system. It goes without saying that the present invention is applicable to vehicles having this mechanism.

(Effects of the Invention) As is clear from the above description, according to the present invention, in a vehicle in which forward or reverse travel is selected by operating the forward or reverse selector lever, the forward or reverse selector lever is moved to the reverse side without applying the brake. Since the vehicle drive control device is configured to include an engine stop means that stops the engine when switching to This has the effect of reliably preventing this.

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram of a drive control device according to the present invention, and FIG.
The figure is a cutaway plan view of the engine of a vehicle equipped with the same drive control device, and FIGS. 3 and 4 are a side view and a plan view, respectively, of the same vehicle. DESCRIPTION OF SYMBOLS 1...Vehicle, 5...Engine, 14...Rear brake lever, 40...Forward/reverse switching lever, 50...
・CD1 ignition device, 60...Selector switch, 70
...neutral switch, 80...brake switch. l00...Engine stop means. Patent applicant Yamaha Motor Co., Ltd.

Claims (1)

[Claims] An engine stop device that is installed in a vehicle in which forward or reverse travel is selected by operating a forward/reverse selector lever, and that stops the engine when the forward/reverse selector lever is switched to the reverse side without applying the brakes. 1. A vehicle drive control device comprising: means.