JPH06171390A - Auxiliary machinery driving device for automobile - Google Patents

Abstract

PURPOSE:To provide an automobile auxiliary machinery driving device facilitating the mounting of an engine to a vehicle without requiring the belt tension adjustment of each auxiliary machine, the control of service life, a measure to counter noise, and the like regarding the automobile auxiliary machinery driving device of such constitution as to drive auxiliary machines utilizing the hydraulic pressure of operating oil. CONSTITUTION:An auxiliary machinery driving device for driving plural auxiliary machines 5, 6, 7 provided at an automobile is provided with a hydraulic pump 2 driven by an engine 1, a hydraulic circuit 3 where operating oil flows through, plural hydraulic motors 4 interposed mutually in series in the hydraulic circuit 3, and output adjusting means 10 respectively provided at plural hydraulic motors 4, and plural auxiliary machines 5, 6, 7 are respectively driven by the hydraulic motors 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle accessory drive system, and more particularly, to a vehicle accessory drive system that drives an accessory machine using hydraulic pressure of hydraulic oil.

[0002]

2. Description of the Related Art Conventionally, in an automobile, engine accessories such as an alternator are generally directly driven by a rotational driving force of an engine using a V belt or the like. In this case, in order to make the belt layout more compact, it is usually advantageous to directly mount (directly attach) each accessory to the engine.

[0003]

However, in the layout of such a conventional engine auxiliary machine, the size of the entire engine is increased by the amount of the auxiliary machine attached to the engine, and the vehicle mountability of the engine is deteriorated. Further, when the auxiliary machine is driven by the belt in this way, there is a problem that it is necessary to adjust the tension of each belt, manage the life of the belt, and take measures against noise.

The present invention was devised in view of the above problems, and increases the degree of freedom in mounting an engine on a vehicle while allowing each accessory to be freely laid out at a location separated from the engine body. An object of the present invention is to provide an accessory drive device for an automobile, which does not require tension adjustment of the belt of each accessory, life management, and noise countermeasures.

[0005]

Therefore, the vehicle accessory drive system of the present invention is provided with a plurality of accessories provided in the vehicle, a hydraulic pump driven by an engine, and a hydraulic pump driven by the hydraulic pump. A plurality of auxiliary machines, each of which includes a hydraulic circuit through which hydraulic oil flows, a plurality of hydraulic motors that are provided in series in the hydraulic circuit, and output adjusting means provided in each of the plurality of hydraulic motors. It is characterized in that the hydraulic motors are respectively driven.

[0006]

In the above-mentioned automobile accessory drive system of the present invention, the hydraulic pump is driven by the engine, and the hydraulic oil in the hydraulic circuit is driven by the hydraulic pump, and the hydraulic oil is provided in series in the hydraulic circuit. Hydraulic pressure is supplied to a plurality of hydraulic motors. Then, each hydraulic motor is actuated by this, and the auxiliary machine connected to each hydraulic motor is driven.

Further, each hydraulic motor is provided with an output adjusting means, by which the output of each hydraulic motor is adjusted.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An automobile accessory drive system as an embodiment of the present invention will now be described with reference to the drawings. FIG. 1 is a schematic view showing the overall construction thereof. As shown in FIG. 1, a hydraulic pump 2 for pressurizing hydraulic oil is attached to the engine body 1, and the hydraulic pump 2 is driven by the rotational driving force from the engine.

The vehicle is also provided with a hydraulic circuit 3 through which the hydraulic oil discharged from the hydraulic pump 2 flows, and the hydraulic circuit 3 is provided with a plurality of hydraulic motors 4 in series. There is. On the other hand, auxiliary equipment such as an alternator 5, a power steering pump 6, and a cooler compressor 7 are provided on the vehicle body side (not shown) of this vehicle.

The auxiliary machines 5 to 7 are each driven by a plurality of hydraulic motors 4 provided in the hydraulic circuit 3 described above. Further, a reservoir tank 8 and a radiator 9 are provided on the downstream side of this hydraulic circuit, and the hydraulic oil supplied to each hydraulic motor 4 is
After being stored in this reservoir tank 8, the radiator 9
It is designed to be cooled by.

Further, each hydraulic motor 4 is provided with an output adjusting means 10 so that the output of each hydraulic motor 4 is adjusted according to the operating state of the engine and the running state of the vehicle. . The output adjusting means 10 is, here, a bypass passage 11, a bypass valve 12, and a controller 1 for adjusting the open / closed state of the bypass valve 12.
3 and 3.

The bypass valve 12 is composed of, for example, a solenoid valve, and has a controller 13
It is controlled by the current from. Then, the output adjusting means 10 can adjust the output of the hydraulic motor 4 as follows, for example. That is, each hydraulic motor 4 is provided with a sensor (not shown) capable of detecting the output state of the hydraulic motor 4, and each auxiliary machine 5-7 is provided with each of these auxiliary machines 5-7.
A sensor is provided that can detect the operating state of the.

These sensors are the controller 1
The controller 13 controls each bypass valve 12 by feedback or the like based on the information from the sensor as described above. Then, for example, when the output of the hydraulic motor 4 driving the alternator 5 is too large, the bypass valve 12 is opened by the control signal of the controller 13. As a result, the hydraulic oil flows into the bypass passage 11 and the output of the hydraulic motor 4 decreases.

The bypass valve 12 is controlled for each hydraulic motor 4 and the output of each hydraulic motor 4 can be adjusted individually. Since the auxiliary device drive device for an automobile as one embodiment of the present invention is configured as described above, the hydraulic pump 2 is driven by the rotational driving force of the engine 1 and the pressurized hydraulic oil causes the hydraulic circuit 3 to rotate. Supplied within. The hydraulic motors 4 arranged in series in the hydraulic circuit 3 are operated by the hydraulic pressure of the hydraulic oil.

Since each of the auxiliary machines 5 to 7 is driven by the hydraulic motor 4, it is possible to eliminate the conventional belt tension adjustment, life management, noise countermeasures and the like associated with belt driving. The hydraulic oil that has passed through the hydraulic circuit 3 flows into the reservoir tank 8 and is then cooled by the radiator 9 and then pressurized again by the hydraulic pump 2 to circulate in the hydraulic circuit 3.

By driving the auxiliaries by utilizing the hydraulic pressure in this way, the driving energy can be efficiently supplied to each auxiliaries 5
~ 7 can be transmitted. Further, by mounting the auxiliary machines 5 to 7 on the vehicle body side without directly mounting them on the engine 1, it is possible to reduce the weight and the rigidity of the engine 1 body, and to reduce vibration and noise. You can

Further, by mounting each of the accessories 5 to 7 on the vehicle body side as described above, the degree of freedom in layout of the accessories in the engine room is increased, and similarly, the degree of freedom in layout of the engine 1 main body is also increased. . In addition, each auxiliary equipment 5
By moving the mounting position of 7 away from the engine 1, vibration to each of the auxiliary machines 5 to 7 is reduced, and the temperature environment improves. This improves the reliability and life of the auxiliary machines 5 to 7.

Incidentally, the above-mentioned auxiliary machine is the alternator 5,
It is not limited to the power steering pump 6 and the cooler compressor 7, and as long as it is an auxiliary device that requires a driving force, it can be mounted on any device other than these auxiliary devices 5 to 7 as a matter of course. Further, these auxiliary machines are not only attached to the vehicle body side, but can be freely attached to other parts.

[0019]

As described in detail above, according to the accessory drive system for an automobile of the present invention, a plurality of accessories provided in the automobile, a hydraulic pump driven by an engine, and a hydraulic pump driven by the hydraulic pump. A hydraulic circuit through which the operating oil is distributed,
The hydraulic circuit includes a plurality of hydraulic motors that are provided in series with each other in series, and output adjusting means that is provided in each of the plurality of hydraulic motors, so that the plurality of auxiliary machines are respectively driven by the hydraulic motors. With such a structure, the conventional belt tension adjustment, life management, noise countermeasures, etc. associated with belt driving are not required, and drive energy can be efficiently transmitted to each accessory.

By mounting each accessory on the vehicle body side rather than directly mounting it on the engine, the engine body can be made lightweight and highly rigid, and vibration and noise can be reduced. . Further, by mounting each accessory on the vehicle body side in this manner, the degree of freedom in layout of the accessory in the engine room is increased, and similarly, the degree of freedom in layout of the engine body is also increased. Further, by arranging each accessory away from the engine, there is an advantage that vibration to each accessory is reduced, the temperature environment is improved, and the reliability and life of the accessory can be improved.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an overall configuration of an automobile accessory drive device as an embodiment of the present invention.

[Explanation of symbols]

 1 Engine Main Body 2 Hydraulic Pump 3 Hydraulic Circuit 4 Hydraulic Motor 5 Alternator 6 Power Steering Pump 7 Cooler Compressor 8 Reservoir Tank 9 Radiator 10 Output Adjusting Means 11 Bypass Passage 12 Bypass Valve 13 Controller

Claims (1)

[Claims] 1. A plurality of auxiliaries provided in an automobile, a hydraulic pump driven by an engine, a hydraulic circuit through which hydraulic oil driven by the hydraulic pump circulates, and a hydraulic circuit interposed in series in the hydraulic circuit. A plurality of hydraulic motors provided and output adjusting means respectively provided to the plurality of hydraulic motors, wherein the plurality of auxiliary machines are respectively driven by the hydraulic motors. Auxiliary equipment drive device for automobiles.