JPS627009B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drive device for a hydraulic power source for a vehicle.
In particular, the present invention relates 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 transmission is turned off. 1st 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. In other words, the electronic control device built into an automatic car is in the D range and 1st position of the shift lever.
The automatic shift line patterns in the range and the second range are stored respectively. If an operating point enters each of the first, second, and third speed regions defined by the automatic shift line pattern from another region, this is detected and a shift operation is automatically performed. The automatic driving system for this type of automatic vehicle is a combination of an automatic clutch and an 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 an automatic vehicle in which the clutch and transmission are controlled by hydraulic pressure as described above, for example, in order to start a stopped vehicle, the engine start operation is performed after the shift lever is shifted to the parking range or N range. When doing this, it is necessary to first operate the hydraulic pressure generator to generate hydraulic pressure before starting the engine, and use this pressure to operate the clutch actuator and turn it off. A motor for driving an oil pump is provided, and when a key switch is turned on, this motor is first driven to generate oil pressure. On the other hand, not only automatic vehicles 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 considerably reduces the price. Therefore, it became one of the key points for this kind of technical orientation.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a novel device for generating 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 a first embodiment of 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 starter motor for starting the engine, and this shaft 7 has a pulley 8.
is installed. 9 is an oil pump of a hydraulic pressure generating device, and the shaft 1 of the oil pump 9
0 has two pulleys 11 and 12 attached to it. And pulley 3 and pulley 11
The pulleys 8 and 12 are connected by a belt 13, and the pulleys 8 and 12 are connected by a belt 14.

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

First, move the shift lever to N to start the vehicle.
After switching to range or P range, at time t1 in FIG. 2, when the key switch is turned to the on position, voltage is applied to the accessory circuit of the vehicle. Next, when the key switch is further rotated to start the engine, the starter switch is turned on, voltage is applied to the starter motor circuit, and the starter motor 6 starts rotating (t2).
This rotational force is transmitted through the pulley 8 and belt 14 to rotate the oil pump 9, as shown in FIG.
Therefore, when the oil pressure reaches a predetermined value (t3) due to the operation of the oil pump 9 of the oil pressure generator, an operation signal is given from the electronic control device to the clutch actuator to turn off the clutch. When a signal indicating the completion of this operation is sent from the clutch to the electronic control unit, the electronic control unit sends a signal to the clutch drive mechanism 5 to operate it, which turns on the magnetic clutch 4 and transfers the driving force of the starting motor 6 to the engine. It is transmitted (t4). Therefore, the engine starts at time t5. When the key switch is returned to the on position at time t6, no voltage is applied to the starter motor 6. However, since the magnetic clutch 4 is kept on continuously, the rotational force of the engine 1 is transmitted to the oil pump 9 via the pulley 3, belt 13, and pulley 11, so this is operated continuously and the oil pressure is increased. Continue sending oil to the 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 t7, the engine 1 stops, the oil pump 9 also stops, the oil pressure decreases, and the bias to the clutch drive mechanism 5 is released. Magnetic clutch 4 is also turned off to prepare for the next start.

FIG. 3 is a block diagram showing another embodiment of the present invention, in which 21 is an engine and 22 is its output shaft. 23 is a pulley;
A magnetic clutch 25 is interposed between the pulley 24 and the other pulley 24. This magnetic clutch 25 is driven by a clutch drive mechanism 26, and when the clutch drive mechanism 26 is energized by a command from an electronic control device (not shown), the magnetic clutch 25 is turned on and the output shaft 22 and pulley 24 are turned on. are connected. 27 is a starter motor for starting the engine, and pulleys 29 and 30 are attached to its shaft 28. 31 is an oil pump of a hydraulic pressure generating device;
A pulley 33 is attached to one shaft 32, and this pulley 33 is connected to a pulley 35 via a magnetic clutch 34.
This magnetic clutch 34 is driven by a clutch drive mechanism 36, and when the clutch drive mechanism 36 is energized by a command from an electronic control device (not shown), the magnetic clutch 34 is turned on and the shaft 32 and pulley 35 are connected. be done. and,
The pulley 29 and the pulley 33 are connected by a belt 37, and the pulley 23 and the pulley 35
The pulleys 30 and 24 are connected by a belt 38, and the pulleys 30 and 24 are connected by a belt 39.

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

After switching the shift lever to the N range or P range to start the vehicle, the key switch is turned to the on position at time t1 in FIG. 4, and voltage is applied to the accessory circuit of the vehicle.
At this time, both magnetic clutches 25 and 34 are off. Next, when the key switch is further rotated to start the engine 21, the starter switch is turned on, voltage is applied to the starter motor circuit, and the starter motor 27 starts rotating (t2). As shown in FIG. 3, this rotational force is transmitted through the pulley 29 and belt 37, and the oil pump 31 is rotated via the pulley 33. Therefore, oil is pumped into the hydraulic circuit, and the internal oil pressure begins to rise. When this oil pressure reaches a predetermined value (t3), an operating signal is given to the clutch actuator from the electronic control unit to turn off the clutch. When a signal indicating the completion of this operation is sent from the clutch to the electronic control device, the electronic control device sends a signal to the clutch drive mechanism 26 to operate it, turning on the magnetic clutch 25, and the driving force of the starting motor 27 is transferred to the engine 21. It is also transmitted (t4). Therefore, the engine starts and starts rotating (t5). Thereafter, when the key switch is returned to the on position at time t6, the starter switch is turned off and no voltage is applied to the starter motor 27. At this time, the magnetic clutch 25 is turned off and the magnetic clutch 34 is turned on according to a command from the electronic control unit, so the rotational force of the engine 21 is transmitted to the oil pump 31 via the pulley 29, belt 37, and pulley 33. It operates continuously and continues to send oil to the hydraulic circuit. After that, you will move the shift lever to the drive position and start the vehicle. After this, when the key switch is turned off to stop the vehicle engine at time t7, the engine 21 stops, the oil pump 31 also stops, the hydraulic pressure decreases, and the bias to the clutch drive mechanism 36 is released, so the magnet The net clutch 34 is also turned off to prepare for the next start.

As explained in detail above, the present invention is configured such that when the engine is started, the starter motor drives the oil pump of the hydraulic pressure generating device, and after the engine starts rotating, the oil pump is driven by the rotational force of the engine. Therefore, although a magnetic clutch is used compared to the conventional device, there is no need for an expensive motor to drive the oil pump, which reduces the production cost of the vehicle compared to the conventional device. It is effective.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention, FIG. 2 is an operation explanatory diagram for explaining its operation, FIG. 3 is a configuration diagram showing a second embodiment of the invention, and FIG. 4 is an operation explanatory diagram for explaining the operation. 1... Engine, 2... Output shaft, 3, 8, 1
1, 12...Pulley, 4...Magnetic clutch, 6...Cell motor, 7...Shaft, 9...
Oil pump, 13, 14...belt.

Claims (1)

[Claims] 1. A shaft that drives an oil pump of a hydraulic pressure generating device and a shaft of a starter motor for engine starting are interlocked and connected, and a shaft that drives the oil pump and an engine shaft are interlocked and connected via a magnetic clutch to start the engine. Driving an on-vehicle hydraulic power source characterized in that when the engine starts, the magnetic clutch is turned off and the oil pump is rotationally driven by a starter motor, and after the engine is started, the magnetic clutch is turned on and the oil pump is driven by the rotational force of the engine. Device.