JP4003245B2 - Automatic transmission hydraulic control device with regenerative function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic with regeneration function transmission hydraulic control equipment.
[0002]
[Prior art]
Conventionally, in an automatic transmission (A / T), oil is circulated by always generating pressure with a pump in order to maintain an engaged state of a clutch, a brake, and the like and internal lubrication.
[0003]
[Problems to be solved by the invention]
First, the loss of the automatic transmission will be described.
[0004]
As shown in FIG. 4, when the vehicle accelerates, travels at a constant vehicle speed, and travels in a traveling pattern that decelerates, then the necessary output is shown in FIG.
[0005]
In FIG. 5, part of the work A during braking is absorbed (converted into heat) by the rotational resistance of the drive system including energy, but most is released as frictional heat from the brake.
[0006]
As far as the automatic transmission is concerned, as shown in FIG. 6, energy is lost during traveling.
[0007]
FIG. 7 is a diagram showing the energy flow of the drive system in the mode running (LA # 4). Among them, the loss in the automatic transmission is about 3.1% of the energy of gasoline consumption.
[0008]
With respect to the loss ratio for each automatic transmission component in various travel patterns, the loss of the oil pump is the second largest after the torque converter.
[0009]
Therefore, reducing the loss of the oil pump while improving the energy efficiency of the automatic transmission is one of the important issues. In other words, the oil pump loss is particularly noticeable because the operation of the pump for maintaining the engagement state of the clutch and brake is completely lost in view of the objective function of driving force transmission of the automatic transmission mechanism. That is. It happens because of the necessity of the mechanism, and it is an important issue to reduce the loss caused by the improvement of fuel consumption.
[0010]
The present invention is, in view of the above circumstances, provided in the running of the vehicle, by regenerating the energy that is a conventional waste, the regeneration function automatic transmission hydraulic control equipment for obtaining aims to improve the efficiency of the automatic transmission It is intended to do.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides
[1] In an automatic transmission hydraulic control device with a regeneration function,
(A) an oil pump provided in an output shaft system of an automatic transmission, means for detecting a deceleration state of the vehicle , a switching valve is operated when the vehicle is in a deceleration state, and the oil pump is connected via a check valve. and accumulator connected to a hydraulic control apparatus for an automatic transmission which is connected to the accumulator, the oil pump includes an electronic control device for controlling to operate in accordance with the pressure condition of the accumulator Automatic transmission hydraulic control device with regenerative function,
(B) a power generator provided in the output shaft system of the automatic transmission, a means for detecting a deceleration state of the vehicle, a storage battery that operates the power generation device when the vehicle is in a deceleration state, and stores electrical energy, and the storage battery An electric oil pump connected to the electric oil pump, a hydraulic control device for an automatic transmission connected to the electric oil pump, and an electronic control device for controlling the power generation device to operate according to the state of charge of the storage battery. The automatic transmission hydraulic control device with a regenerative function is used together .
[0012]
[Operation and effect of the invention]
According to the present invention, an oil pump and / or a power generation device is provided in an automatic transmission output shaft system (A / T output shaft-wheel), and the vehicle deceleration engine brake or brake is operated when necessary, so far. The discarded deceleration energy is collected and converted into hydraulic energy / electric energy, and the hydraulic pressure is stored in a pressure accumulator and / or a storage battery. Then, the hydraulic pressure of the pressure accumulator and / or the power of the storage battery can be utilized for maintaining the engaged state when the vehicle is stopped, accelerated, steady running, or the like.
[0013]
The hydraulic pump shall operate only during deceleration. As a method, switching by an electromagnetic clutch or the like and a method of idling by switching the oil suction port are conceivable.
[0014]
In addition, since the accumulated hydraulic pressure alone may be insufficient, an electric pump may be provided as a supplement, or the hydraulic pump may be operated intermittently.
[0015]
By constructing the system as described above, the vehicle's deceleration energy, which has been wasted in the past, can be used effectively, the oil pump is driven, and the loss caused by the oil pump that was wasted during normal driving is eliminated. The efficiency of the aircraft can be improved and fuel consumption can be improved.
[0016]
Moreover, the deceleration energy of the vehicle that has been wasted in the past is collected and converted into electric energy, and the electric energy is stored in a storage battery. And, when the vehicle is stopped, accelerated, steady running, etc., the electric oil pump is operated by the energy of the storage battery to eliminate the loss due to the oil pump that was wasted during normal running, and the efficiency of the automatic transmission can be improved. This can improve fuel efficiency.
[0017]
By configuring the system as described above, it is possible to effectively use the deceleration energy that was previously wasted, drive the oil pump, eliminate the loss caused by the oil pump that was wasted during normal driving, Efficiency can be improved and fuel consumption can be improved.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings.
[0019]
FIG. 1 is an overall system configuration diagram of an automatic transmission with a regeneration function showing an embodiment of the present invention, FIG. 2 is a schematic diagram of a main part of the automatic transmission with a regeneration function of the hydraulic storage system, and FIG. It is a principal part schematic diagram of the automatic transmission with a regeneration function. Although FIG. 1 shows the combined use of the hydraulic storage system and the electrical storage system, it may be considered individually as shown in FIGS.
[0020]
In FIG. 1, 1 is an engine (E / G), 2 is a torque converter (T / C) connected to the engine (E / G), and the power from the torque converter (T / C) is an automatic transmission ( A / T) 3. The automatic transmission (A / T) 3 is provided with a clutch, a brake 4, a gear set 5, an oil pump 6, and a switching valve 7. In the electric storage system, a power generator 8 is provided on the output side shaft of the automatic transmission (A / T) 3, and a differential gear 9 and wheels 10 are further provided.
[0021]
On the other hand, 11 is an oil pan, 12 is a check valve, 13 is a pressure accumulator (accumulator), 14 is an oil level sensor, 15 is a hydraulic gauge, 16 is a hydraulic control device, 17 is a storage battery (battery), and 18 is electric oil. A pump, 21 is an electronic control unit (ECU), 22 is a running state detection device, and includes various sensors such as a throttle, a brake, a vehicle speed, and an accelerometer. Reference numeral 23 denotes a navigation device.
[0022]
First, the hydraulic pressure accumulation method will be described with reference to FIG.
[0023]
As shown in this figure, the oil pump (O / P) 6 is connected to the output shaft of the automatic transmission (A / T) 3 and rotates integrally with the movement of the vehicle. The electronic control unit (ECU) 21 is a travel state information from a travel state detection device (various sensors such as throttle, brake, vehicle speed, and accelerometer) 22 (see FIG. 1) and navigation from a navigation device 23 (see FIG. 1). The information is taken in, the situation where deceleration is necessary, the deceleration state such as the driver's intention to decelerate (for example, brake signal) is judged, and when the vehicle is in the deceleration state, the switching valve 7 is operated and the oil pump 6 inhales the oil, guides the oil to the accumulator 13 and accumulates it as hydraulic energy.
[0024]
The switching valve 7 is opened to prevent the oil pump 6 from being loaded after the vehicle is stopped or during acceleration or traveling. At that time, the check valve 12 is provided between the oil pump 6 and the pressure accumulator 13, so that the oil does not flow backward.
[0025]
The accumulated hydraulic energy is released to the hydraulic control device 16 in every subsequent running state and used to operate the automatic transmission.
[0026]
Next, the electrical storage method will be described with reference to FIG.
[0027]
The difference between the electrical storage system and the hydraulic storage system is that the oil pump 6 is replaced with the power generator 8 and the accumulator 13 is replaced with the storage battery 17, which is basically the same as the hydraulic storage system. However, since it is necessary to convert electrical energy into hydraulic energy, the electric oil pump 18 is necessary. The storage battery 17 can also be used as a storage battery originally mounted on the vehicle.
[0028]
That is, the electronic control unit 21 takes in the navigation information from the traveling state detection device (various sensors such as throttle, brake, vehicle speed, and accelerometer) 22 and the navigation device 23, and the situation where deceleration is required, during deceleration, the driver's deceleration When the vehicle is in a decelerating state, the power generation device 8 is activated and the storage battery 17 is charged. The charged electric energy supplies the oil from the oil pan 11 to the hydraulic control device 16 by operating the electric oil pump 18 by the charged storage battery 17 after the vehicle is stopped or during acceleration or traveling. In other words, the stored electric energy is released to the hydraulic control device 16 in all subsequent running states and used to operate the automatic transmission.
[0029]
Both of the above formulas are established in principle, but the accumulated energy is depleted when continuously traveling at a low speed for a long time. Therefore, the pressure of the pressure accumulator 13 and the state of charge of the storage battery 17 are always detected by the electronic control device 21, and control is performed so that the oil pump 6 and the power generation device 8 operate during traveling as necessary.
[0030]
In addition, this invention is not limited to the said Example, A various deformation | transformation is possible based on the meaning of this invention, and they are not excluded from the scope of the present invention.
[Brief description of the drawings]
FIG. 1 is an overall system configuration diagram of an automatic transmission with a regeneration function according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of a main part of an automatic transmission with a regenerative function of a hydraulic pressure accumulation system showing an embodiment of the present invention.
FIG. 3 is a schematic diagram of a main part of an automatic transmission with an electric storage type regeneration function according to an embodiment of the present invention.
FIG. 4 is a diagram showing a running pattern of a vehicle.
FIG. 5 is a diagram showing an output required when the vehicle is traveling.
FIG. 6 is a diagram showing a loss in an automatic transmission of a vehicle.
FIG. 7 is an energy flow diagram in mode running (LA # 4).
[Explanation of symbols]
1 Engine (E / G)
2 Torque converter (T / C)
3 Automatic transmission (A / T)
4 Clutch and brake 5 Gear set 6 Oil pump 7 Switching valve 8 Power generator 9 Differential gear 10 Wheel 11 Oil pan 12 Check valve 13 Accumulator
14 Oil level sensor 15 Oil pressure gauge 16 Hydraulic control device 17 Storage battery
18 Electric oil pump 21 Electronic control unit (ECU)
22 Traveling state detection device 23 Navigation device

Claims (1)

(A) an oil pump provided in the automatic transmission output shaft system, means for detecting a decelerating state of the vehicles, to actuate the switching valve when the front Symbol vehicle is in the deceleration state, the through a check valve and accumulator which is connected to an oil pump, a hydraulic control device for an automatic transmission which is connected to the accumulator, an electronic control device for the oil pump is controlled to operate in accordance with the pressure condition before Symbol accumulator An automatic transmission hydraulic control device with a regenerative function comprising :
(B) a power generator provided in the output shaft system of the automatic transmission, a means for detecting a deceleration state of the vehicle, a storage battery that operates the power generation device when the vehicle is in a deceleration state, and stores electrical energy, and the storage battery An electric oil pump connected to the electric oil pump, a hydraulic control device for an automatic transmission connected to the electric oil pump, and an electronic control device for controlling the power generation device to operate in accordance with the state of charge of the storage battery. An automatic transmission hydraulic control device with a regenerative function is used in combination with an automatic transmission hydraulic control device with a regenerative function.

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