JP2001032917A - Oil pump control device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To output working oil of sufficient quantity and hydraulic pressure speedily at the time when a shift lever is operated to a travelling range in the case of stopping actuation of an electric oil pump to output the working oil for speed change and lubrication of a transmission at the time when the shift lever is operated to a P range. SOLUTION: Actuation of an electric auxiliary oil pump is stopped (S6) as working oil is not immediately required in the case of a brake OFF (judgement of S4 is YES), but actuation of the auxiliary oil pump is started (S8) as possibility of the shift lever to be changed over and operated from the P range to the travelling range of R and D, etc., is high when a brake is operated ON (judgement of S4 is NO) on a vehicle on which actuation of a driving source of an engine, etc., is stopped at the time when the shift lever is operated to the P range and discharge of a mechanical oil pump becomes zero in accordance with it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil pump control device for a vehicle, and more particularly to an improvement in a control device for restricting the operation of an electric oil pump when a shift operation member is operated to a non-travel position. .

[0002]

2. Description of the Related Art When a shift operating member is operated to a non-traveling position, the operation of an electric oil pump is stopped for the purpose of power saving or the like, and when the shift operating member is operated to a traveling position, the electric oil pump is operated. 2. Description of the Related Art There is known an oil pump control device for a vehicle that releases an operation restriction and operates in a predetermined operation state. Hydraulic oil output from the electric oil pump lubricates gears and the like of a power transmission switching device such as a transmission provided between a driving source for driving and driving wheels, and hydraulic pressure of the power transmission switching device. It is used to operate an actuator to establish a predetermined power transmission state. The device described in Japanese Patent Application Laid-Open No. H6-174055 is an example of such a device, in which an oil pump is rotationally driven by an electric motor and a driving source for traveling.
When the shift operation member is operated to the non-travel position of the P range or the N range, the electric motor is stopped, and when the shift operation member is operated to any other travel position, the electric motor is fully operated to supply a sufficient amount of hydraulic oil. Output.

[0003]

However, in such a conventional oil pump control device, since the electric motor is operated after the shift operation member is switched from the non-traveling position to the traveling position, a sufficient hydraulic pressure and It takes time until the oil amount is obtained, and, for example, the establishment of the power transmission state is delayed, and there is a possibility that the start may be delayed or lubrication failure may occur.

The present invention has been made in view of the above circumstances, and has as its object to limit the operation of the electric oil pump when the shift operation member is operated to the non-traveling position. It is an object of the present invention to output a sufficient amount or hydraulic oil promptly when an operating member is operated to a traveling position.

[0005]

In order to achieve the above object, a first aspect of the present invention is provided with a pump limiting means for limiting the operation of the electric oil pump when the shift operating member is operated to the non-travel position. In the oil pump control device for a vehicle which releases the operation restriction of the electric oil pump by operating the shift operation member to the traveling position and operates the electric oil pump in a predetermined operation state, (a) the shift operation member is Switching prediction means for predicting that the traveling switching operation is performed based on a predetermined operation of the driver before the traveling switching operation for operating from the traveling position to the traveling position is actually performed; (b) the switching; When the predicting means predicts that the travel switching operation will be performed, the operation restriction of the electric oil pump by the pump restricting means is released and the electric oil pump is operated in a predetermined operating state. And prior pump actuating means, characterized in that the provided.

[0006] The "non-traveling position" refers to a P (parking) range, an N (neutral) range, or the like. This is a position where the operation of the driving source is stopped or the driving force is not generated on the driving wheels,
"Running position" is R (reverse) range or D (drive)
A position where a driving force can be generated by transmitting a driving force from a driving source for driving to a driving wheel in a range or the like, and mechanically or electric means depending on an operation position of a shift operation member. And so on.

According to a second aspect of the present invention, in the oil pump control apparatus for a vehicle according to the first aspect, the switching predicting means predicts that the traveling switching operation will be performed based on an ON operation of a brake operating member. A brake operation detection device is provided for detecting that the operation member has been turned ON.

The ON operation of the brake operation member means an operation for obtaining a braking force.

According to a third aspect, in the vehicle oil pump control device according to the first aspect, (a) the shift operation member permits the travel switching operation when a select button is turned on. (b) The switching predicting means predicts that the traveling switching operation will be performed when the select button is turned on or the brake operating member is turned on, and that the select button is turned on. And a brake operation detecting device that detects that the brake operating member has been turned ON.

According to a fourth aspect of the present invention, in the oil pump control device according to the first aspect of the invention, the switching predicting means is configured to execute the traveling when the shift operating member starts moving from the non-traveling position or when the brake operating member is turned on. A shift movement detecting device that predicts that a switching operation will be performed, and detects that the shift operating member has started to move from the non-travel position, and a brake operation that detects that the brake operating member has been turned on. A detection device is provided.

[0011]

According to the first aspect of the invention, when the switching predicting means predicts that the traveling switching operation will be performed based on a predetermined operation of the driver, the preceding pump operating means limits the operation of the electric oil pump by the pump limiting means. Is released and the electric oil pump is operated in the predetermined operation state,
When the shift operating member is actually operated from the non-traveling position to the traveling position, a sufficient hydraulic pressure and oil amount can be obtained.
As a result, for example, the start-up slackness and poor lubrication caused by the delay in establishment of the power transmission state are improved.

In the second aspect of the present invention, the travel switching operation is predicted based on the ON operation of the brake operation member. Generally, when the shift operation member is operated from the non-travel position to the travel position, the brake operation member is turned ON. Therefore, the traveling switching operation can be predicted with high accuracy. Particularly, in a vehicle in which the travel lock operation is prevented by the shift lock mechanism when the brake is off, the brake operation member is always turned on prior to the travel switch operation, so that the operation of the electric oil pump is reliably restricted before the travel switch operation. Is released, and the apparatus can be operated in a predetermined operation state.

According to the third aspect of the present invention, the travel switching operation is predicted by the ON operation of the select button or the brake operation member, so that the electric oil can be more reliably provided before the travel switching operation than the second invention. The operation restriction of the pump is released. In addition, the operation restriction of the electric oil pump is released at the stage when one of them is turned ON, and the electric oil pump can be operated in a predetermined operation state, so that the hydraulic pressure and the oil amount when the travel switching operation is actually performed are performed. Shortage is more effectively prevented.

In the fourth aspect of the invention, the traveling switching operation is predicted when the shift operation member starts to move from the non-traveling position or when the brake operation member is turned on, so that the same effect as in the third aspect of the invention is obtained.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is applicable to a vehicle having a mechanical oil pump mechanically driven by a driving source such as a vehicle, for example, while the vehicle is running. The electric oil pump is configured to be operated when the rotational speed of the traveling drive source that cannot output the torque is equal to or less than a predetermined value. The mechanical oil pump and the electric oil pump may be all separately formed. However, even if the pump unit is common and only the driving source is different as described in JP-A-6-174055, good. Further, the electric oil pump may output necessary hydraulic oil even when the vehicle is not running, and the electric oil pump may be used in all cases including during traveling of the vehicle.

The present invention is suitably applied to, for example, an electric vehicle or a hybrid vehicle when the operation of a driving source such as an engine or an electric motor is stopped when the shift operating member is operated to a non-traveling position. However, even in the non-traveling position, even when the traveling drive source is driven to rotate at a predetermined rotation speed (for example, an idle rotation speed), there is no mechanical oil pump that is rotationally driven by the traveling drive source. The present invention can also be applied to a case where a sufficient oil amount and hydraulic pressure cannot be obtained only by a mechanical oil pump.

The hydraulic oil output from the electric oil pump lubricates gears of a power transmission switching device such as a transmission and a forward / reverse switching device provided between a driving source for driving and driving wheels, for example. It is used to establish a predetermined power transmission state by operating a hydraulic actuator of the power transmission switching device. As the power transmission switching device, a planetary gear type transmission in which a power transmission state such as a gear stage is switched by engagement and release of a hydraulic friction engagement device, and an engagement and release state of an engagement clutch with a plurality of hydraulic cylinders Various devices are used, such as a two-shaft meshing transmission in which the power transmission state such as the gear position is switched by switching the gear. In such a power transmission switching device, a portion that switches a power transmission state by switching a hydraulic circuit by an electromagnetic valve is an automatic switching device.For example, when a shift operation member is switched from a non-travel position to a travel position,
When the hydraulic circuit is switched by the manual shift valve to establish a predetermined power transmission state, it can be regarded as a manual switching device. However, the power transmission switching device is not always essential, and may be a case where a power transmission state is always maintained from the driving source for traveling to the driving wheels. In that case, the hydraulic oil is used for lubrication, cooling, and the like.

Although the pump restricting means is configured to completely stop the operation of the electric oil pump to save power, for example, it may be one that maintains a low-speed rotation state lower than usual. This pump restricting means restricts the operation of the electric oil pump when the shift operating member is operated to the non-traveling position such as the P range or the N range. It is not necessary to limit the operation of the electric oil pump only at some non-traveling positions, for example, when the vehicle is operated to a stop position such as a P range for stopping the vehicle. good.

The switching predicting means is constructed, for example, as in the second to fourth aspects of the present invention. The prediction can be made based on various operations related to the traveling switching operation, such as a case where the traveling switching operation is predicted based only on the movement start. The switching predicting unit predicts that at least the traveling switching operation in which the shift operation member is operated from the non-traveling position to the traveling position is performed, and promptly switches the electric oil pump in order to prevent start-up delay, lubrication failure, and the like. Since the operation is intended to be performed, there is no problem if the switching operation from the non-traveling position to the non-traveling position such as the switching operation from the P range to the N range is erroneously predicted as the traveling switching operation.

The second invention to the fourth invention are suitably applied to a case where a shift lock mechanism for preventing a shift switching operation of a shift operation member when a brake is off is provided, but is applied to a vehicle having no shift lock mechanism. May also be applied.

In the brake operation detecting devices according to the second to fourth inventions, a brake switch that switches between ON and OFF when a brake operation member such as a brake pedal is operated by a predetermined stroke is preferably used. The ON operation of the brake operation member can also be detected by measuring the operation force (load, torque, etc.) at the time or the braking force (brake oil pressure of a hydraulic wheel cylinder, etc.) generated according to the brake operation. When the brake operating member is turned ON, the brake switch or the like is turned OFF.
It does not need to be N and may be OFF.

The select button operation detecting device according to the third aspect of the present invention includes, for example, a select button switch that is turned on and off by engaging with a select button or a member that moves in conjunction with the select button. The detecting device detects that the shift operation member has moved in the select direction from the P range in the gate type shift pattern, for example.
A contact switch and an operation force switch that is turned on when an operation force in a direction of exiting from the non-travel position is applied to the shift operation member. The shift operation member is generally positioned and held at each operation position by a detent mechanism, biasing means, or the like. The select button is, for example, an automatic return type button provided on the shift operation member. When the push operation is not performed, a shift operation (shift operation) of the shift operation member from a predetermined operation position such as a P range is performed. It is configured to mechanically block and allow the moving operation only during the pushing operation. The select button operation detecting device such as the select button switch does not need to be turned on when the select button is turned on, but may be turned off.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram of a hybrid drive device 10 for a vehicle to which the present invention is applied. The hybrid drive device 10 includes an engine 12 and a motor generator 14 as a drive source for traveling. The power is transmitted to the transmission 18 and transmitted to drive wheels from a differential device (not shown) or the like. Engine 12 crankshaft 1
2s is connected to the motor shaft 14s of the motor generator 14, and the motor shaft 14s is connected to the pump wheel 20 of the torque converter 16. Motor generator 14
Is used not only as an electric motor but also as a generator. The torque converter 16 includes a lock-up clutch 22 and the turbine wheel 2
4 is connected to the input shaft 26 of the automatic transmission 18.

The automatic transmission 18 is a power transmission automatic switching device. In this embodiment, a planetary gear type stepped transmission is used, and the planetary gear device and a hydraulic clutch or brake (friction engagement device) are used. A plurality of clutches and brakes are connected and disconnected by the hydraulic control circuit 28 to establish a plurality of forward gears and reverse gears having different speed ratios, a neutral state for interrupting power transmission, and the like. It has become. The hydraulic control circuit 28 includes an electromagnetic switching valve, a linear solenoid valve, and the like. These solenoids are controlled by the control device 30 to switch the oil passage and control the oil pressure to control the automatic transmission 18. And the lock-up clutch 22 of the torque converter 16 is turned on.
(Connection) and OFF (interruption) are also switched. The hydraulic control circuit 28 includes the torque converter 16
Hydraulic oil is supplied from an oil pump 32, which is driven to rotate integrally with the pump impeller 20, and when the rotation of the torque converter 16 is stopped, that is, when the operation of the engine 12 and the motor generator 14 is stopped, the battery The working oil is supplied from an electric auxiliary oil pump 34 that is driven to rotate by the electric energy. The oil pump 32 is a mechanical oil pump, and the auxiliary oil pump 34 is equivalent to an electric oil pump. The hydraulic oil supplied from these oil pumps 32 and 34 switches the power transmission state of the automatic transmission 18. For example, the automatic transmission 18 is lubricated.

Since the motor generator 14, the torque converter 16, and the automatic transmission 18 are configured substantially symmetrically with respect to the center line, the lower half is omitted in FIG.

FIG. 2 shows a specific example of the automatic transmission 18.
(A) is a skeleton diagram and (b) is a clutch and
And brake engagement, release and power transmission states (gears
Is an operation table showing a relationship with the operation table. This automatic transmission 1
8, three single pinion type planetary gear units 60;
62, 64, frictionally engaged by a hydraulic actuator.
Hydraulic clutch C₁, C_Two, Brake B₁,
B_Two, B_Three, B_FourAnd one-way clutch F₁, F_TwoAnd
It is composed. And the electromagnetic switching valve or the like
When the hydraulic control circuit 28 is switched,
Manual mechanically linked to the shift lever as
The hydraulic control circuit 28 is mechanically turned off by the shift valve.
The clutch C₁, C_Two,
Rake B ₁, B_Two, B_Three, B_FourAre shown in Fig. 2 (b).
Engagement and disengagement control so that four forward steps (1st to 4t)
h) and the first reverse speed (Rev) are established.
It is. In the P (parking) range, all friction
The engagement device is released, and the power transmission is cut off. The illustration is
However, the same applies to the N (neutral) range. What
The P range is a non-traveling position, but a mechanical
The rotation of the output shaft 56 is locked by the parking lock mechanism.
This is a stop position where the vehicle is stopped and the vehicle is kept stopped.

In FIG. 2B, "○" in the column of clutch, brake and one-way clutch indicates engagement, "●" indicates engagement during engine braking, and blank column indicates non-engagement. In this case, the parking P and the reverse gear Rev are established when the hydraulic control circuit 28 is mechanically switched by the manual shift valve, and the shift lever D
The shift between 1st to 4th when operated to the (forward) range is electrically controlled by an electromagnetic switching valve provided in the hydraulic control circuit 28. FIG. 3 is a diagram showing a shift pattern of the shift lever, "P (parking)",
"R (reverse)", "N (neutral)", "D
(Drive) "," 3 "," 2 ", and" L "in total, and the shift lever is positioned in each operation range by a detent mechanism. . The solid line between the operation ranges indicates the movement path of the shift lever, and in this embodiment, the gate type has a U-shaped bypass between the “P” range and the “R” range. is there. In addition, 1st ~
The gear is shifted at 3rd, and in the “2” range, 1st and 2n
The speed is changed at d, and is fixed at 1st in the “L” range.
The shift pattern in FIG. 3 is provided in the front-rear direction of the vehicle, and the upper side is the front of the vehicle.

Returning to FIG. 1, the control device 30
U includes one or a plurality of microcomputers for performing signal processing in accordance with a program stored in the ROM while utilizing a temporary storage function of the RAM. The hydraulic control circuit 28 and the auxiliary oil pump 34
In addition, the operation of the engine 12, the motor generator 14, and the like is controlled. The control device 30 includes the brake switch 4
0, P contact switch 43, shift position sensor 4
2. Accelerator operation amount sensor 44, drive source rotational speed sensor 46, input rotational speed sensor 48, output rotational speed sensor 5
0, etc., are connected to the brake pedal 52
Of and brake signal S _B indicating whether or not depressing operation, the shift lever is other P contact signal S _P to be OFF when moved from the "P" range to the select direction (the left direction in FIG. 3), the shift lever The shift position P _SH , which is the operation range, the depression amount (accelerator operation amount) θ _{ACC of} the accelerator pedal 54, the driving source rotation speed N ₁ , which is the rotation speed of the motor shaft 14 s, and the rotation speed of the input shaft 26 of the automatic transmission 18. input rotational speed N _iN, the rotation speed at which the output speed N _OUT of the output shaft 56 of the automatic transmission 18 (corresponding to the vehicle speed V), various detection signals and the like are supplied is.

When the brake pedal 52 is depressed by a predetermined stroke, in other words, in order to obtain a predetermined braking force, the brake switch 5 is turned on.
2 is turned ON when the ON operation is performed, and corresponds to a brake operation detecting device. The P contact switch 43 corresponds to a shift movement detecting device. The brake pedal 52 corresponds to a brake operation member operated according to the required braking force, and the accelerator pedal 54 corresponds to an accelerator operation member operated according to the required output.

The shift position sensor 42, in a slide switch that detects the vertical position in the shift direction position or 3 of the shift lever, also P contact signal S _P output P contact switch 43 is a is OFF, the shift direction position The "P" range is maintained until exceeds the midpoint between the P range and the R range. The manual shift valve of the hydraulic control circuit 28 also switches the hydraulic circuit by mechanically moving the valve element (spool) in the axial direction by movement of the shift lever in the shift direction, and is substantially synchronized with the shift position sensor 42. To switch. The shift position sensor 42 is configured such that the contacts are mechanically switched by, for example, movement of a spool valve element of a manual shift valve. In the vicinity of the shift lever, the brake signal S _B of the brake switch 40 is set to O.
At the time of FF, there is provided a shift lock mechanism for preventing the shift lever from being operated to move from the "P" range in the shift direction, that is, the downward direction in FIG.

The engine 12 and the motor generator 14 are basically operated so as to generate a driving force in accordance with the power required by the driver, and the driving source rotation speed N ₁ , the accelerator operation amount θ _ACC , the battery Are sequentially used in accordance with a drive source switching condition such as a drive source map determined in advance using the amount of stored power (SOC) or the like as a parameter. For example, the motor generator 14 is used at an extremely low vehicle speed at the time of starting or the like.
2 is mainly used for traveling. Further, even when the accelerator operation amount θ _ACC is in the accelerator OFF state where the accelerator operation amount is substantially 0, when the shift lever is operated to a traveling position such as “R” or “D” and the brake is OFF, a predetermined creep torque is generated by the motor generator 14. Is generated. In the non-traveling positions of the “P” range and the “N” range, the operations of the engine 12 and the motor generator 14 are both stopped. FIG. 6 shows an operation position (shift position) of the shift lever when the vehicle is stopped, the engine 12, and the motor generator (MG) 1.
4 is a table showing a relationship between the operation state of the auxiliary oil pump 34 and the operating state of the auxiliary oil pump 34. On the other hand, the hydraulic control circuit 28 controls the automatic transmission 1 according to a shift condition such as a shift map that is predetermined using the accelerator operation amount θ _ACC and the vehicle speed V as parameters.
8 is switched.

The auxiliary oil pump 34 is controlled by the control device 30 according to the flowchart shown in FIG. The flow chart of FIG. 4 is repeatedly executed at a predetermined cycle time that is predetermined while the vehicle is operating, that is, when an operation switch such as an ignition key is ON.

[0033] In step S1 of FIG. 4, it is determined whether or not the first speed N ₁₁ higher the drive source rotation speed N ₁ is predetermined, if N ₁ ≧ N ₁₁ in step S6 of the auxiliary oil pump 34 The operation is stopped, and the auxiliary pump operation flag F is set to "0" in step S7. First speed N ₁₁ is
Only the oil pump 32 of the mechanical lubricating and sufficient oil pressure or slightly higher rotational speed than the second speed N ₁₂ of the oil amount is not obtained required gear are previously fixed value is set. That is, when N ₁ ≧ N ₁₁ , the mechanical oil pump 32
A sufficient hydraulic pressure and oil amount can be obtained only by using the auxiliary oil pump 34. By stopping the operation of the auxiliary oil pump 34 in step S6, power saving and the like can be achieved.

N₁<N₁₁NO in step S1
In the case of (No), the driving source rotation speed N is determined in step S2.₁
Is the second speed N₁₂Judge whether or not₁≤N₁₂That
If step S3 and subsequent steps are executed,₁> N₁₂Case
That is, N₁₂<N₁<N₁₁When step S5, execute step S5
I do. In step S5, the auxiliary pump operation flag F is
Whether it is “1”, that is, the current auxiliary oil pump 3
4 is operating or not, and if not operating,
Steps S6 and S7 are executed, and if it is in operation (F = 1),
In step S8, the auxiliary oil pump 34 is operated in a predetermined
And F = 1 in step S9.
Carry. The auxiliary oil pump 34 always has a constant rotational speed.
(Discharge amount).
Source rotation speed N₁= 0, a predetermined constant discharge
Operating at the output₁If not = 0, the rotation speed
N₁Drive source rotation to compensate for the lack of hydraulic oil
Speed N ₁To operate with a smaller discharge rate as
You may do it.

When the determination in step S2 is YES (Yes)
, Ie N₁≤N₁₂Step S3 executed in case of
Let's check if the shift lever is in the "P" range
Based on the signal supplied from the shift position sensor 42,
If not in the “P” range, steps S8 and S
9 is executed. In the case of the "P" range, in step S4
Whether the brake is off or not is supplied from the brake switch 40
Brake signal S _BIs determined by whether or not is OFF
If the brake is off, execute steps S6 and S7
To stop the operation of the auxiliary oil pump 34,
If the key is ON, steps S8 and S9 are executed to
The oil pump 34 is operated in a predetermined operation state.

Here, in the "P" range, as is apparent from FIG.
Are in a stopped state, and the mechanical oil pump 32
Is 0, but while the vehicle is stopped,
Friction engagement device (clutch and brake) for automatic transmission 18
2 (b), since all are in the released state, the hydraulic oil for lubrication and shifting is unnecessary, and the operation of the auxiliary oil pump 34 can be basically stopped. This can save power and the like. on the other hand,
When the shift lever is switched from the “P” range to the running position such as the “R” range or the “D” range, the brake pedal 52 must be depressed by the action of the shift lock mechanism and the brake switch 40 must be turned on. Must be
In step S4, it is determined whether or not the brake switch 40 is ON. If the brake switch is ON (brake ON), the driver switches the shift lever from the "P" range to the running position such as the "R" range or the "D" range. In step S8, the operation of the auxiliary oil pump 34 is started at that time, that is, before the shift lever is actually switched. As a result, when the shift lever is actually operated to the running position such as the “R” range or the “D” range, a sufficient hydraulic pressure or oil amount can be obtained, and even if the accelerator pedal 44 is immediately depressed, The gear stage (power transmission state) of the automatic transmission 18 is quickly established, and a sufficient lubricating action is obtained.

In the present embodiment, of the series of signal processing executed by the control device 30, the part executing steps S3 and S6 functions as the pump limiting means, and the part executing step S4 functions as the switching predicting means. The function of executing the step S8 for starting the operation of the auxiliary oil pump 34 when the determination in the step S4 is NO functions as a preceding pump operating means. In addition,
In the present embodiment, also in the case of the P → N shift, the auxiliary oil pump 34 is operated at the stage of the brake ON.

FIG. 5 is a flowchart showing the operation of the flowchart of FIG.
Torque and drive source rotation speed N₁Operation of each part such as
It is an example of a time chart which shows a change of a state. Take
In FIG. 5, at time 0, the shift lever is in the “P” range.
With the vehicle stopped, the engine 12 and the motor generator
The operation of any of the pumps 14 is stopped, and the auxiliary oil pump
34 also stops operating (rotational speed 0). Time t
₁Means that the brake pedal 52 is depressed
This is the time when the switch 40 is turned on, and
The determination in step S4 is NO, and in step S8 the auxiliary oil
The pump 34 is operated and the line of the hydraulic control circuit 28 is operated.
Hydraulic pressure P_LIs raised. Time t_TwoActually shift
This is the time when the lever was switched to the "R" range,
The hydraulic control circuit 28 is mechanically operated by the new shift valve.
Is switched, the clutch C_TwoAnd
Rake B_FourHydraulic fluid is supplied to the hydraulic actuator
You. In the column of hydraulic pressure in FIG.
_RIs the clutch C_TwoAnd brake B _FourHydraulic actuator
Eta oil pressure, that is, reverse oil pressure
In the example, the line hydraulic pressure P_LThere is
Hydraulic pressure P for reverse_RIs P → R
Immediately rises with the foot.

Time t ₃ is the time when the brake pedal 52 is released and the brake switch 40 is turned off. At this stage, the motor generator 14 starts operating and a predetermined creep torque is obtained. Thus, the rotation speed is increased to the predetermined rotation speed N _idl . Time t ₄
Is the rotational speed or the drive source rotation speed N ₁ of the motor-generator 14 is the time to reach the rotation speed N _idl,
Rotational speed N _idl is greater than the first speed N _11, the determination in step S1 in FIG. 4 become YES becomes N ₁ ≧ N ₁₁ before time t _4, the auxiliary oil pump 3 in step S6
4 is stopped. Thereby, the working oil is supplied only by the mechanical oil pump 32 thereafter.

The time t ₅ is a time when the engagement (slip) of the clutch C ₂ and the brake B ₄ is started, and the drive torque in the negative direction, that is, the reverse direction, gradually increases and rises to a predetermined creep torque. The dotted line in FIG.
In the case where the operation of the auxiliary oil pump 34 is started in the shift stage (time t ₂ ), the time until the drive torque starts to increase t ₆ is later by Δt than in the present embodiment.

As described above, in this embodiment, when the shift lever is in the "P" range and the brake is off, the operation of the auxiliary oil pump 34 is stopped in step S6.
When the brake pedal 52 is turned on (depressed) even in the "P" range, it is predicted that the shift switching operation of the shift lever, that is, the switching operation from the "P" range to the running range, will be performed. Auxiliary oil pump 34
Since the operation stop is released and the operation is performed in the predetermined operation state, a sufficient hydraulic pressure and oil amount can be obtained when the shift lever is actually operated to the traveling position. This allows
The gear stage (predetermined power transmission state) of the automatic transmission 18 is quickly established, a drive torque is generated, and a sufficient lubrication action is obtained.

In particular, in this embodiment, the traveling switching operation is predicted based on the ON operation of the brake pedal 52, but when the brake is OFF, the switching operation from the "P" range is prevented by the shift lock mechanism. Before the shift switching operation of the shift lever, the brake pedal 52
Is turned ON, the operation of the auxiliary oil pump 34 is reliably started before the travel switching operation, and is operated in a predetermined operating state.

Next, another embodiment of the present invention will be described. In the following embodiments, the same parts as those in the above embodiment are denoted by the same reference numerals, and detailed description will be omitted.

The flowchart of FIG. 7 is executed instead of the flowchart of FIG.
The difference is that 0 is additionally provided. Step S
Step 10 is executed when the determination in the step S4 is YES, that is, when the brake is OFF. It is determined whether the P contact switch 43 is ON or not, that is, when the shift lever is in the select direction from the "P" range. If it has not moved (leftward in FIG. 3), the operation of the auxiliary oil pump 34 is stopped in step S6, but if it is not ON, that is, if the shift lever is moved from the "P" range to the select direction. In step S8, the operation of the auxiliary oil pump 34 is started.

Eventually, in this case, the auxiliary oil pump 34 is predicted not only when the brake pedal 52 is turned ON but also when the shift lever starts to move from the "P" range, and it is predicted that the drive switching operation will be performed. However, since both the ON operation of the brake pedal 52 and the moving operation of the shift lever are necessary operations prior to the switching operation to the traveling position, the traveling switching is surely performed under a wider condition than in the above embodiment. Before the operation, the operation stop of the auxiliary oil pump 34 is released. Further, when one of the determinations in steps S4 and S10 becomes NO, the operation stop of the auxiliary oil pump 34 is released, and the auxiliary oil pump 34 can be operated in a predetermined operating state. Insufficient oil pressure and oil amount when the contact is made can be prevented more effectively.

In the present embodiment, a part of the series of signal processing performed by the control device 30 for executing steps S4 and S10 functions as a switching prediction means.

The flowchart of FIG. 8 is executed in place of the flowchart of FIG. 4, but is a case where the select button 74 is provided on the knob 72 of the shift lever 70 as shown in FIG. The difference is that step S11 is additionally provided. This shift lever 70
As shown in FIG. 9B, operation ranges (operation positions) such as “P”, “R”, “N”, and “D” are provided in a straight line direction that is the front-rear direction of the vehicle, and When the select button 74 is not turned on (pressed), the operation of moving from the “P” range to another operation range is mechanically blocked.
When the button 4 is turned on, a movement operation from the “P” range is permitted. The select button 74 is a button of an automatic return type, and a moving operation from the “P” range is allowed only while the pressing operation is performed. And this select button 7
A select button switch 76 is provided so as to be directly engageable with the switch 4 or a member that moves in conjunction with the select button 74, and is wired so as to be turned ON when the select button 74 is pressed. ing. The select button switch 76 corresponds to a select button operation detecting device.

Step S11 in FIG.
This is executed when the judgment of No. 4 is YES, that is, when the brake is off, and the select button switch 76 is turned off.
If it is OFF, that is, if the select button 74 has not been pushed, the operation of the auxiliary oil pump 34 is stopped in step S6.
That is, when the select button 74 is being pressed, the operation of the auxiliary oil pump 34 is started in step S8. Therefore, not only when the brake pedal 52 is turned on but also when the select button 74 is turned on (push-in operation), it is predicted that the traveling switching operation will be performed, and the auxiliary oil pump 34 is operated. Since both the ON operation of the brake pedal 52 and the ON operation of the select button 74 are necessary operations prior to the operation of switching to the travel position, it is possible to reliably assist the operation before the operation is switched under a wider condition than in the case of FIG. The operation stop of the oil pump 34 is released. At the stage where one of the determinations in steps S4 and S11 is NO, the auxiliary oil pump 34
Is released, and can be operated in a predetermined operation state, so that shortage of hydraulic pressure and oil amount when the travel switching operation is actually performed is more effectively prevented.

In this embodiment, a part of the series of signal processing performed by the control device 30 for executing steps S4 and S11 functions as a switching predicting means.

Although the embodiment of the present invention has been described in detail with reference to the drawings, this is merely an embodiment,
The present invention can be implemented in various modified and improved aspects based on the knowledge of those skilled in the art.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a hybrid drive device to which the present invention is applied.

FIG. 2 is a diagram illustrating a specific example of the automatic transmission of FIG. 1;
(a) is a skeleton diagram, and (b) is an operation table of the friction engagement device.

FIG. 3 is a diagram illustrating an example of a shift pattern of a shift lever of the hybrid drive device of FIG. 1;

FIG. 4 is a flowchart specifically illustrating control of an auxiliary oil pump executed by the control device of FIG. 1;

5 is an example of a time chart showing a change in operation of each unit such as a driving torque, a driving source rotation speed N ₁ , and a hydraulic pressure accompanying the control of the auxiliary oil pump shown in FIG. 4;

FIG. 6 is a diagram showing the relationship between the shift position when the vehicle is stopped and the operating states of the engine, motor generator, and auxiliary oil pump in the hybrid drive device of FIG. 1 separately for brake ON and OFF.

FIG. 7 is a diagram for explaining another embodiment of the present invention, and is a flowchart used instead of FIG. 4;

FIG. 8 is a view for explaining still another embodiment of the present invention.
It is a flowchart used instead of.

9 is a diagram illustrating a shift lever in the embodiment of FIG.

[Explanation of symbols]

30: Control device (oil pump control device) 34: Auxiliary oil pump (electric oil pump) 40: Brake switch (brake operation detection device) 43: P contact switch (shift movement detection device) 52: Brake pedal (brake operation member) 70: shift lever (shift operation member) 74: select button 76: select button switch (select button operation detecting device) Steps S3, S6: pump limiting means Step S4: switch predicting means Step S4, S10: switch predicting means Step S4, S11: switching prediction means Step S8: preceding pump operating means

Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat II (reference) F16H 63:12 F term (reference) 3G093 AA05 AA07 AA16 BA04 DA06 DB00 DB01 DB11 DB12 DB15 EB06 EB07 EC02 EC03 FA11 FB05 3J052 AA17 DB10 GC04 GC13 GC64 GC72 GC73 HA02 KA02 KA03 LA01

Claims (4)

[Claims] And a pump restricting means for restricting the operation of the electric oil pump when the shift operating member is operated to the non-traveling position. In an oil pump control device for a vehicle that releases an operation restriction of a pump and operates in a predetermined operation state, a travel switching operation in which the shift operation member is operated from the non-travel position to the travel position is actually performed. Switching prediction means for predicting that the travel switching operation will be performed based on a predetermined operation by the driver; and when the switching prediction means predicts that the travel switching operation will be performed, An oil pump system for a vehicle, comprising: a preceding pump operating means for releasing an operation restriction of the oil pump and operating the oil pump in a predetermined operating state. Control device. 2. A brake operation detecting device for predicting that the travel switching operation is performed based on an ON operation of a brake operating member, wherein the switch predicting means detects that the brake operating member has been turned ON. The oil pump control device for a vehicle according to claim 1, further comprising: 3. The shift operation member, wherein a select button is
When the N operation is performed, the travel switching operation is permitted, and the switching predicting unit performs the travel switching operation when the select button is turned on or the brake operation member is turned on. A select button operation detecting device that detects that the select button has been turned ON, and a brake operation detecting device that detects that the brake operating member has been turned ON. The vehicle oil pump control device according to claim 1, wherein 4. The switching predicting means predicts that the traveling switching operation will be performed when the shift operating member starts moving from the non-traveling position or when a brake operating member is turned on. 2. A shift movement detecting device for detecting that the operating member has started to move from the non-traveling position, and a brake operation detecting device for detecting that the brake operating member has been turned ON. The oil pump control device for a vehicle according to claim 1.