JPH0267433A - Vehicle engine control device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle engine control device.

(Prior art) In vehicles such as tractors, the hand accelerator lever that operates the throttle lever of the engine and the operating pedal of the H5T for driving linked to the engine are completely independent, and during normal driving, the accelerator lever is not used. is fixed, and the H3T is increased/decelerated using the operating pedal.

(Problem to be solved by the invention!a) In the conventional case, when the maximum speed is required, the accelerator lever is set to the fully open position, which increases fuel consumption, and when stopping or driving at low speed. However, the drawback was that the engine noise was high.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to enable control of increasing/decelerating engine speed in conjunction with increasing/decelerating operations of a speed change pedal of a continuously variable transmission.

(Means for Solving the Problems) To achieve this, the present invention provides a hand accelerator lever 30 for operating the throttle lever 14 of the engine 2 and a continuously variable transmission device 31 for driving linked to the engine 2 for increasing/decelerating operation. In a vehicle equipped with an operating pedal 38, the operating pedal 38 is configured such that the throttle lever 14 operates in the increasing/decelerating direction in conjunction with the increasing/decelerating operation of the continuously variable transmission 31.
8 and a throttle lever 14 are interlocked.

(Function) After setting the engine speed with the hand accelerator lever 30, when the operation pedal 38 is depressed to operate the continuously variable transmission 31 to increase or decrease the speed, the throttle lever 14 is operated in the direction of increase or deceleration via the interlocking mechanism 45. do. Therefore, the engine 2 rotates at a rotational speed corresponding to the speed of the continuously variable transmission 31.

(Example) Hereinafter, the present invention will be described in detail based on the illustrated example. In FIG. 3, reference numeral 1 denotes a tractor body, which is composed of an engine 2, a transmission case 3, etc., and has front wheels 4 and rear wheels 5. A rear wheel 5 is supported on both rear sides of the transmission case 3 via a rear axle case 6 and a rear axle 7 as shown in FIGS. 5 to 7, and a rear wheel fender 8 is disposed inside the rear wheel 5.
is attached via the rear axle case 6, etc. Reference numeral 9 denotes a driver's seat, which is freely reversible back and forth between a forward position indicated by a solid line and a rearward position indicated by an imaginary line. 10 is a sunshade that covers the upper part of the driver's seat 9, and includes a pair of front columns 11 and rear columns 12 on the left and right sides,
The front strut 11 is placed on the rear wheel fender 8, and the rear strut 1
2 are respectively attached to the rear axle case 6.

As shown in FIGS. 1 and 2, the engine 2 includes a throttle lever 14' that rotates around a vertical throttle shaft 13.
E: This throttle lever 14 is connected to an intermediate lever 16 via a rod 15. Intermediate lever 16
is pivotally supported on a fixed side by a support shaft 17 so as to be swingable back and forth, and has a link 18 that projects rearward. An inner 21 of a Bowden cable 20 is connected to the link 18 by a pin 19, and a connector 26 of an inner 25 of a Bowden cable 24 is connected to the link 18 via a pin 22 and a long hole 23. Note that each outer part of the Bowden cables 20 and 24 is fixed to a bracket 27. An inner 25 of the Bowden cable 24 is connected to a hand accelerator lever 30 which is pivotally supported on a mounting base 28 by a support shaft 29. The hand accelerator lever 30 can be fixed at any position due to frictional resistance, etc., and the mounting base 28 is attached to the accelerator lever 3.
0 is attached to the rear wheel fender 8 or the like so that it can be operated from either the driver's seat 9 at the solid line position or the imaginary line position.

Inside the mission case 3, an H3T31 for running that is linked to the engine 2 is incorporated. H3T31 is equipped with a swash plate type hydraulic pump 32, and its swash plate shaft 33 is connected to a lever 34.
By rotating the wheel, you can increase or decrease speed in forward or backward motion. The lever 34 is connected via a rod 35 to a lever 37 on a pedal shaft 36, and the lever 37 is integrally fixed to an operating pedal 38 supported on the pedal shaft 36. The operation pedal 38 has pedal parts 39 and 40 at the front and rear, and the speed can be increased by depressing the pedal part 39 to move forward, and by depressing the pedal part 40 to move backward. In addition, the operating pedal 38 has a lever 4 that protrudes forward.
1 is fixed, and the Bowden cable 2 is connected to this lever 41.
A loft 44 that engages with a long hole 43 of a connecting tool 42 connected to the inner 21 of 0 is pivotally connected. And lever 41° rod 44. Connector 42. Bowden cable 20. Link 18. The intermediate lever 17 and the like constitute an interlocking mechanism 45 for increasing and decelerating the throttle lever 14 in conjunction with increasing and decelerating operations of the operating pedal 38.

Note that the outer part of the Bowden cable 20.24 is the metal fitting 46. They are each fixed to a mounting base 28.

47 is a front loader with mast 48. Boom 49° Boom cylinder 50. Packet 51. Packet cylinder 5
It consists of two parts and is attached to the front part of the tractor body 1. 53 is a backhoe, and as shown in FIG. 4, a machine frame 54. Swivel base 55. Swivel cylinder 56. Boom 57° Boom cylinder 58. Arm 59. Arm cylinder 60° packet 61. It consists of a packet cylinder 62, etc., and its machine frame 54
is removably attached to the rear of the tractor body 1 via a mounting mechanism 63.

Reference numeral 64 denotes a hydraulic system for lifting and lowering the working machine, which has a pair of left and right lift arms 65, and is mounted on the rear of the tractor body 1. Each lift arm 65 is connected to a pair of left and right lower links 67 via a lift loft 66. Further, when the backhoe 47 is attached, the lower link 67 is attached to a storage mounting bin 68 fixed to the lower part of the rear strut 12 above the rear axle case 6, as shown in FIGS. 4 to 7. When 47 is removed, they are removably attached to attachment pins 69 fixed to the lower end of the rear strut 12 at the lower rear of the rear axle case 6. The mounting pin 68 has an orthogonal shape in plan view, and is mounted on the mounting plate 70 of the rear strut 12 so as to protrude inwardly. 71 so as to be in contact with the rear support column 12 from the inside. The check chain 71 is connected to the rear column 1
2 is connected to the mounting hole 72 at the lower end of the main body.

The mounting pin 69 and the mounting hole 72 are provided on the same axis.

In the above configuration, the accelerator lever 30 is moved in the acceleration direction (a
arrow), the Bowden cable 24° connector 2
6. Since the intermediate lever 16 rotates in the direction of arrow b via the link 18, the throttle lever 1 rotates via the rod 15.
4 operates in the speed increasing direction (arrow C), and the engine speed is increased appropriately. At this time, the connector 42 moves via the link 18 and the Bowden cable 20, but the loft 44 is
3, and therefore the operation pedal 3
8 doesn't move.

When the hand lever 30 is set to the idle position, the shaft portion 44a of the rod 44 is located at the center of the elongated hole 43 as shown in FIG. 8A, and when the hand lever 30 is set to the medium speed position,
When set to the right side of the elongated hole 43 as shown in FIG. 8B and further to the fully open position, they are located at the right end of the elongated hole 43 as shown in FIG. 8C.

Therefore, when the pedal portion 39 of the operation pedal 38 is next depressed to the forward speed increasing position, the lever 37. Rod 35° Lever 34. The swash plate angle of the hydraulic pump 32 becomes maximum via the swash plate shaft 33, and the speed of the HS Ta2 is changed to high speed.

On the other hand, the lever 41 and the operating pedal 38 are connected to the pedal shaft 36.
As the rod 44 rotates in the direction of arrow d, the shaft portion 4 of the rod 44
4a engages with the left end of the elongated hole 43 and pulls the connector 42 at idle and at medium speeds, so the Bowden cable 20
, the intermediate lever 16 is rotated in the direction of arrow b via the link 18, and the throttle lever 14 is operated to the fully open position.

However, when the throttle lever 14 is already in the fully open position, the shaft portion 44a of the rod 44 simply slides within the elongated hole 43. Furthermore, even if the link 18 rotates in the direction of the arrow b, the accelerator lever 30 will not move at the set position because of the long hole 23, and when the operation pedal 38 is released, the HS Ta2 will return to neutral. , throttle lever 14
is returned by a spring (not shown) and operates in the deceleration direction to the speed set by the accelerator lever 30. Therefore, the engine speed can be increased/decreased in conjunction with the increase/deceleration operation of HS Ta2, and therefore, wasteful fuel consumption of the engine 2 can be prevented, and
Engine noise can be reduced when the vehicle is stopped.

Note that the interlocking mechanism 45 is not limited to that in the embodiment, and the continuously variable transmission may be mechanical.

(Effects of the Invention) According to the present invention, the interlocking mechanism 45 interlocks the operating pedal 38 and the throttle lever 14 so that the throttle lever 14 operates in the increasing/decelerating direction in conjunction with the increasing/decelerating operation of the continuously variable transmission 31. , the engine speed can be controlled to increase or decrease in conjunction with the increase or decrease operation of the speed change pedal 38.
Therefore, problems such as wasteful fuel consumption and engine noise can be solved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a cutaway side view of the main part, Fig. 2 is a plan view of a part of the throttle lever, Fig. 3 is a side view of the whole, and Fig. 4 is a side view of the backhoe side. Figure 5 is a side view, Figure 5 is a perspective view of the rear strut attachment part, Figure 6 is the same side view, Figure 7 is a side view.
The figure is a sectional plan view of the same, and FIGS. 8A, B, and C are action explanatory views. DESCRIPTION OF SYMBOLS 1... Tractor body, 2... Engine, 3... Mission case, 14... Throttle lever, 30...
・Hand accelerator lever 131...H3T, 38・
...Operation pedal, 45...Interlocking mechanism.

Claims (1)

[Claims] (1) A hand accelerator lever (30) that operates the throttle lever (14) of the engine (2), and a hand accelerator lever (30) that operates the throttle lever (14) of the engine (2).
), the throttle lever (14) is linked to the operation pedal (38) for increasing/decelerating the continuously variable transmission (31) for driving in conjunction with the continuously variable transmission (31). An engine control device for a vehicle, comprising an interlocking mechanism (45) that interlocks an operating pedal (38) and a throttle lever (14) so that the engine operates in an increasing/decelerating direction.