JPS58118424A - Driving device for hydraulic pressure source mounted on vehicle - Google Patents

Abstract

PURPOSE:To dispense with an oil pump driving motor any more, by driving an oil pump belonging to a hydraulic pressure generator with a fan motor prior to engine starting, while driving the oil pump with the engine turning force instead after engine rotation. CONSTITUTION:A magnet clutch 4 is interposingly set up in a space between a power shaft 2 and a pulley 3 for an engine 1 and driven by a clutch driving mechanism 5. Likewise, a pulley 11 and a pulley 13 via a magnet clutch 12 in case of the latter are attached to a shaft 10 of an oil pump 9 belonging to a hydraulic pressure generator while the magnet clutch 12 is driven by a clutch driving mechanism 14. And, pulleys 3 and 11 are coupled through a belt 15 and also a pulley 8 and the said pulley 13 are coupled together with a belt 17 via a pulley 16. With this, attending upon the on-action of a key switch, the driving force of the engine 1 is transmitted to the oil pump 9 via the magnet clutch 4 after the oil pump 9 is rotated by a fan motor 6 via the magnet clutch 12.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a vehicle hydraulic power source, and more particularly to a drive device for a vehicle hydraulic power source that drives a transmission or a clutch device.

Recently, automatic vehicles have been developed and put into practical use in automobiles, especially passenger cars. In such an automatic vehicle, for example, when the shift lever is shifted from the N range (neutral position) to the D range (drive position) in order to start the vehicle, the clutch is automatically turned off, and then the first shift lever of the transmission is turned off. The highest gear is selected. When the accelerator pedal is depressed from this state, the amount of depression of the accelerator pedal is detected, the clutch is automatically turned on, and the vehicle starts moving. Furthermore, in such an automatic vehicle, gear shifting operations are performed automatically while the vehicle is running. That is, the electronic control device built into the automatic vehicle stores the automatic shift line patterns in the D range, the second range, and the second range of the shift range. If an operating point enters each of the 1st, 2nd, and 3rd speed regions defined by the automatic shift line pattern from another region, this is detected and a shift operation is automatically performed. This type of automatic driving device combines an automatic clutch and automatic transmission, and various types have been developed. There is something that makes it work. This type of vehicle is equipped with a hydraulic pressure generator, which continuously sends high-pressure hydraulic pressure to a hydraulic circuit while the vehicle is in operation. By the way, in the above-mentioned automatic vehicle in which the clutch and transmission are controlled by hydraulic pressure,
For example, in order to start a stopped vehicle, the shift lever
When starting the engine after shifting to the parking range or N range, first, before starting the engine, the hydraulic pressure generator is activated to generate hydraulic pressure, and this pressure operates the clutch actuator to disengage the clutch. Because it is necessary to do this, a motor is usually provided to drive the oil pump of the hydraulic pressure generating device, and when the key switch is turned on, this motor is first driven to generate hydraulic pressure. On the other hand, not only automatic cars but also general vehicles are technologically oriented to simplify the mechanism and reduce the cost of the vehicle, but installing a motor to drive the oil pump can significantly increase the price. This has become one of the bottlenecks for such technological orientation.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a novel device that can generate hydraulic pressure in a fluid-controlled automatic vehicle without the need for a special motor for generating hydraulic pressure.

Next, embodiments of the present invention will be described in detail using the drawings.

FIG. 1 is a block diagram of an embodiment according to the present invention, in which 1 is an engine and 2 is its output shaft. 3 is a pulley, and a magnetic clutch 4 is interposed between the pulley 3 and the output shaft 2. This magnetic clutch 4 is driven by a clutch drive mechanism 5, and when the clutch drive mechanism 5 is energized by a command from an electronic control device (not shown), the magnetic clutch 4 is turned on and the output shaft 2 and pulley 3 are connected. are concatenated. 6 is a fan motor for cooling the engine, and a pulley 8 is attached to the shaft 7 of the fan motor. The vehicle in this embodiment is a front engine, front drive vehicle, and therefore the shaft 7 of the fan motor 6 is disposed at right angles to the output shaft 2 of the engine.

Reference numeral 9 denotes an oil pump of a hydraulic pressure generator, and a pulley 11 is attached to a shaft 10 of the oil pump 9. In addition, a magnetic clutch 12 is attached to the shaft lO.
A pulley 13 is attached via. This magnet club 1. The clutch 12 is driven by a clutch drive mechanism 14, and when this is energized by a command from an electronic control device (not shown), the magnetic clutch 12 is turned on. Pulley 3 and pulley 11 are connected by belt 15, and pulleys 8 and 13 are connected by pulley 16.
They are connected by a belt 17 via. Note that the pulleys 16 are formed in two stages and rotate independently of each other, the upper pulley has a going belt attached to it, and the lower pulley has a returning belt attached to it.

Next, the operation of the above embodiment will be explained using the operation diagram shown in FIG.

First, after switching the shift lever to N range or P range to start the vehicle, at time tl in Fig. 2, turn the key switch to the on position, and voltage is applied to the accessory circuit of the vehicle. applied. As a result of this operation, a voltage is applied to fan motor No. 6, and this starts rotating. On the other hand, by applying a voltage to the accessory circuit, a signal is given from the electronic control device to the clutch drive mechanism 14, and when this is energized, the magnetic clutch drive mechanism 12 is turned on. Therefore, the rotational force I of the fan motor 6
tAs shown in Fig. 1, pulley 8, heald 17, boot 9
-13, the oil pump 9 rotates through the magnet clutch 12. Therefore, the oil pressure soon reaches a predetermined value due to the operation of the oil pump 9 of the oil pressure generator (t2). Here, an operation signal is given to the clutch actuator from the electronic control unit to switch the clutch off. Thereafter, at time t3, when the key switch is turned to the engine star upper position, the starter switch is turned on, and at time t4, the engine 1 is started and begins to rotate by a starter device (not shown).

Thereafter, the key switch is returned to the on position (t5).

When the electronic control device confirms that the engine has started, it sends a signal to the clutch drive mechanism 5 to operate it, turning on the magnetic clutch 4 and transmitting the driving force of the engine 1 to the oil pump 9. At the same time, the bias against the clutch drive mechanism 14 is released, and the magnetic clutch 12 is turned off. However, since the magnetic clutch 4 is kept on continuously, the rotational force of the engine l is transferred to the pulley 3, the belt 15, and the pulley 11.
The oil is then transmitted to the oil pump 9, which is operated continuously to continue sending oil to the hydraulic circuit. Thereafter, the vehicle will be started by switching the shift lever to the drive position. After this, when the key switch is turned off to stop the vehicle engine at time t6, the engine l stops, so the oil pump 9 also stops, the oil pressure decreases, and the bias to the clutch drive mechanism 5 is also released. Therefore, magnetic clutch 4 is also turned off and preparations are made for the next start.

As explained in the details above, the present invention drives the oil pump of the hydraulic pressure generator with the fan motor before starting the engine, and after the engine starts rotating, the connection with the fan motor is cut off. Since the oil pump is configured to be driven by rotational force, it uses a magnetic clutch compared to conventional devices, but it eliminates the need for an expensive oil pump drive motor compared to conventional devices. This has many benefits, such as lower vehicle manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of the present invention, and FIG. 2 is an operation explanatory diagram for explaining its operation. l...Engine 2.φ Output shaft 3.8.11.13.16...Pulley 4.12-.Magnetic clutch

Claims (1)

[Claims] A shaft that drives an oil pump of a hydraulic pressure generating device and a shaft of a fan motor are interlocked and connected via a first magnet clutch, and a second magnet clutch connects the shaft that drives the oil pump and the output shaft of the engine. When the engine is stopped, the first magnetic clutch is turned on and the second magnetic clutch is turned off, allowing the fan motor to rotate the oil pump.When the engine is started, the first magnetic clutch is turned off. A drive device for an on-vehicle hydraulic power source, characterized in that a second magnetic clutch is turned on to drive an oil pump by the rotational force of an engine.