JPH0565731U - ARS device in tractor - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention enables an all-wheel drive tractor to be easily judged, especially when both wheels of the drive wheels spin evenly. It is an object of the present invention to provide an ARS device for an all-wheel drive tractor which enables deceleration control of an engine corresponding to the spin even if spin occurs on the wheels, thereby further improving traveling stability. According to the present invention, attention is paid to the fact that the trailer B side wheel on which the tractor head A is towed is a driven wheel 3, and the means 34 for detecting the vehicle speed and the detection signal of the detecting means 34 are transmitted to the tractor head A side. Means 9A, 9B for transmitting to the side of the ARS control unit 4 arranged on the trailer B side, and driven wheels 3 on the side of the trailer B and drive wheels 1, 2 on the side of the tractor head A.
Each of the vehicle speed signals is taken into the unit 4, and ARS control is performed based on the speed signal.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an ARS (anti-spin regulator) control device in an all-wheel drive tractor in which both front wheels and rear wheels are drive wheels.

[0002]

[Prior Art]

 In the past, when starting from a snowy road, a flat road on a split road, or a slope, if excessive torque is applied to the tire due to the depression of the accelerator pedal, the tire may spin (spin) and the vehicle may not start smoothly. Similarly, if the accelerator pedal is pressed too much while traveling on a curve on a snowy road, the driving wheels may spin and the vehicle may swing backward. In order to eliminate such a drawback, when one of the driving wheels is spinning, brake the spinning wheel to limit the actuation of the differential of the axle, and When the car is spinning, an ARS device has been proposed that reduces the engine output to ensure a smooth start and prevent swinging.

Such an ARS device takes in the wheel speeds of the driven wheel and the driving wheel into a control unit via a sensor, and when one wheel of the driving wheel spins or the wheels of both wheels spin unevenly based on the speed signal. Brake control is performed via the control valve so that both wheels have an equal rotation speed.On the other hand, if both wheels of the drive wheel spin evenly, the driven wheel and the drive wheel have the same rotation speed. The ARS motor (in the case of a mechanical governor specification diesel engine, for example, a servomotor for controlling an injection pump) reduces the engine output.

[0004]

[Problems to be solved by the device]

 Since the above-mentioned device detects the spin condition on the driving wheel side based on the wheel speed difference between the driven wheel and the driving wheel, in the so-called four-wheel driving device in which only the driving wheel exists, the When both driving wheels spin equally, it is difficult to determine whether the driving wheels are in a spinning state because there are no driven wheels. Especially, the application of the ARS device that slows down the engine output. Is quite difficult. Also, in the case of a tractor towing a trailer, it is difficult to apply the ARS device when adopting the all-wheel drive system, but if the above-mentioned spin occurs on the tractor head side, the inertial force on the trailer side causes unstable running. Is easy to increase.

In view of the drawbacks of the prior art, the present invention makes it possible to easily determine even in the case of a tractor adopting an all-wheel drive system, especially when both wheels of the drive wheels spin evenly. It is an object of the present invention to provide an ARS device for an all-wheel drive tractor, which enables deceleration control of an engine corresponding to the occurrence of spin on the drive wheels of the vehicle and thereby further enhances running stability.

[0006]

[Means for solving the problem]

 The present invention focuses on the fact that the wheel on the trailer B side on which the tractor head A is towed is the driven wheel 3 as shown in FIG. 1, and the means 34 for detecting the vehicle speed and the detection signal of the detection means 34 are Means 9A, 9B for transmitting to the ARS control unit side arranged on the tractor head A side are provided, and the vehicle speed signals of the driven wheels 3 on the trailer B side and the drive wheels 1, 2 on the tractor head A side are transmitted to the control unit 4. Even if all the driving wheels 1 and 2 spin equally based on the speed signal, the spin status can be grasped by the difference in the vehicle speed with the driven wheel 3. Thus, the output of the engine 42 can be reduced by controlling the ARS motor 41 so that the driven wheels 3 and the driving wheels 1 and 2 have the same rotation speed.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be illustratively described in detail with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the constituent parts described in this embodiment are not intended to limit the scope of the present invention to them, but are simple. It's just an example.

FIG. 2 is an ARS control system diagram of a tractor according to an embodiment of the present invention. The left side of the figure is a tractor head A, and the right side is a trailer B towed by the tractor head A. The tractor head A has front wheels 1A, 1B and rear wheels 2A, 2B as driving wheels, and wheel brakes 11, 21 operable by brake chambers 12, 22 are attached to the respective wheels. 10T, 10R, and 10F are air tanks that supply air pressure to the front, rear, and trailer B side brake chambers 12, 22, and 32, respectively. By depressing the dual brake valve 7, front wheels 1A and 1B are connected. The operating pressure is supplied to each brake chamber 12 via the control valve 13, and the braking force is applied to the wheel brake 11 by the operation of the brake chamber 12. On the side of the rear wheels 2A, 2B, the signal pressure of the brake valve 7 is supplied to the relay valve 8R, so that the operating pressure of the air tank 10R is supplied to each brake chamber 22 via the control valve 23. The braking force is applied to the wheel brake 21 by the operation.

Vehicle speed sensors 14 and 24 detect the wheel speeds of the front wheels 1A and 1B and the rear wheels 2A and 2B, and transmit the detected wheel speeds to the ABS / ARS control unit 4. On the other hand, on the trailer B side, a pair of left and right driven wheels 3 in which wheel brakes 31 are inserted, a brake chamber 32 that can also function as a parking brake, a control valve 33, a vehicle speed sensor, and an ABS control unit 5 are provided. The above-mentioned ABS controller and the ABS / ARS control unit 4 on the tractor side are connected to respective harnesses via connectors 9A and 9B to supply power from the unit 4 side of the tractor to the unit 5 side of the trailer B. The detection signal from the vehicle speed sensor 34 on the trailer driven wheel 3 side can be taken into the unit 4 side of the tractor via the unit 4.

The brake chamber 32 is connected to the emergency coupling 6B and the service coupling 6A on the tractor head A side via an air line, and as a result, the brake valves on the front wheels 1A, 1B side or the rear wheels 2A, 2B side. When the signal pressure of 7 reaches the relay valve 8T, the operating pressure of the air tank 10T is supplied to each brake chamber 32 through the control valve 33, and the operation of the brake chamber 32 applies the braking force to the wheel brake 31. Be energized. When the air pressure in the air tank 8T escapes for some reason, the air in the chamber 32 decreases via the emergency coupling 6B, which causes an emergency spring (not shown) in the chamber 32. It will be activated and an emergency stop will be possible.

Next, the operation related to the ARS of this embodiment will be described. First, the signal from the sensor 34 which detects the wheel speed of the driven wheel 3 on the trailer B side is sent via the connector 9A / 9B, and similarly, the vehicle speed signals of the drive wheels 1 and 2 on the tractor head A side are respectively sent to the tractor head A. When the two drive wheels 1 and 2 are evenly spun based on the speed signal, the ARS mode is set so that the driven wheel 3 and the drive wheels 1 and 2 have the same rotation speed. When the engine output is decelerated by the rotor 41, and one of the drive wheels 1 and 2 spins or the front and rear wheels spin unevenly, the control valves 13 and 23 are used to bring the two wheels to a uniform rotational speed. Brake control can be performed so that

[0012]

【effect】

 As described above, according to the present invention, it is possible to easily determine whether the tractor adopts the all-wheel drive method or especially when both wheels of the drive wheel spin evenly. Even if a spin occurs, it is possible to obtain an ARS drive device for an all-wheel drive tractor that enables engine deceleration control corresponding to this and further improves running stability, which is extremely preferable from a safety standpoint. It has various remarkable effects.

[Brief description of drawings]

[Fig. 1] Basic configuration diagram of the present invention

FIG. 2 is an ARS control system diagram of a tractor according to an embodiment of the present invention.

[Explanation of symbols]

 A tractor head B trailer 3 driven wheel 34 vehicle speed detection means 9A, 9B transmission means 4 control unit 1, 2 drive wheels 41 ARS motor 42 engine

Claims (1)

[Scope of utility model registration request] 1. In an all-wheel drive tractor in which all wheels on the tractor head side are drive wheels, a means for detecting the vehicle speed of a trailer side driven wheel and a detection signal of the detection means are provided on the tractor head side. ARS in a tractor, characterized by comprising means for transmitting to the ARS control unit side, taking in vehicle speed signals of the driven wheels on the trailer side and the driving wheels on the tractor head side, and performing ARS control based on the vehicle speed signals. apparatus