JP2020131834A - Control device - Google Patents

Abstract

To provide a control device capable of issuing an appropriate instruction value to a drive power source in accordance with required acceleration.SOLUTION: A control device 100 of a vehicle 102 comprising a torque converter-type transmission 101 is configured in such a manner that the control device 100 determines load torque of a torque converter 104 on the basis of a rotation speed of a drive power source 109 and a capacity factor of the torque converter 104 which are based a speed ratio of the torque converter 104, determines excessive or shortage torque on the basis of load torque and target torque which are based on an accelerator opening degree and determines an instruction value for the drive power source 109 in consideration of the excessive or shortage torque and issues the instruction value to the drive power source 109.SELECTED DRAWING: Figure 1

Description

The present invention relates to a control device for a vehicle equipped with a torque converter type transmission.

For example, the automatic transmission (AT; A utomatic T ransmission) and automated manual transmissions; the vehicle comprising (AMT A utomated M anual T ransmission ) torque converter typified type transmission is, the target torque based on the accelerator opening It is determined, the indicated value to the driving force source is determined based on the target torque, and the indicated value is instructed to the driving force source.

JP-A-2007-196868 Japanese Unexamined Patent Publication No. 2008-038721 JP-A-2010-144686

However, conventionally, open-loop control has been adopted to determine the target torque and the indicated value by referring to the map showing the relationship between the accelerator opening and the target torque and the map showing the relationship between the target torque and the indicated value. Therefore, it was not possible to give an appropriate indicated value to the driving force source according to the required acceleration.

In view of the above circumstances, it is an object of the present invention to provide a control device capable of giving an appropriate indicated value to a driving force source according to a required acceleration.

A vehicle control device equipped with a torque converter type transmission, in which the load torque of the torque converter is determined based on the capacitance coefficient of the torque converter based on the speed ratio of the torque converter and the rotation speed of the driving force source, and the load is determined. The excess / deficiency torque is determined based on the torque and the target torque based on the accelerator opening, the indicated value to the driving force source is determined in consideration of the excess / deficiency torque, and the indicated value is instructed to the driving force source. A control device configured in is provided.

When determining the indicated value in consideration of the excess / deficiency torque, the target torque is corrected based on the excess / deficiency torque, and the indicated value is further determined based on the corrected target torque. It is desirable that it is further configured.

When determining the indicated value in consideration of the excess / deficiency torque, the indicated value is determined based on the target torque, the indicated value is corrected based on the excess / deficiency torque, and the final indicated value is determined. It is desirable that it is further configured.

It is desirable that the driving force source is composed of an internal combustion engine, and the indicated value means an indicated fuel injection amount.

It is desirable that the driving force source is composed of an electric motor, and the indicated value means an applied current amount.

It is possible to provide a control device that can give an appropriate indicated value to the driving force source according to the required acceleration.

It is a figure which shows the structure of the vehicle which mounts the control device which concerns on embodiment. It is a figure explaining the operation of the control device which concerns on embodiment.

Hereinafter, embodiments will be described in order of the accompanying drawings.

As shown in FIG. 1, the control device 100 according to the embodiment is mounted on a vehicle 102 including a torque converter type transmission 101.

Controller 100, for example, an electronic control unit (ECU; E lectronic C ontrol U nit) is composed of various devices can be electrically connected or communicatively provided in the vehicle, below the driving force source 109 In addition to controlling the torque converter 104 and the torque converter 104, various calculations and the like are performed. The control device 100 may be configured by a single piece of hardware, or may be configured by combining a plurality of electronic control devices.

An accelerator opening sensor 103 that detects the accelerator opening is electrically connected to the control device 100.

The accelerator opening degree detected by the accelerator opening degree sensor 103 is input to the control device 100.

The torque converter type transmission 101 includes a torque converter 104 and a transmission 105.

The torque converter 104 includes a pump impeller 106, a turbine runner 107, and a stator 108.

The pump impeller 106 is mechanically connected to an output shaft (crankshaft) 110 driven by a driving force source 109.

The driving force source 109 is composed of, for example, an internal combustion engine or an electric motor represented by a gasoline engine or a diesel engine.

When the driving force source 109 is an internal combustion engine, the rotation speed of the driving force source 109 and the torque of the driving force source 109 are adjusted by controlling the indicated fuel injection amount to the internal combustion engine by the control device 100.

When the driving force source 109 is an electric motor, the rotation speed of the driving force source 109 and the torque of the driving force source 109 are adjusted by controlling the amount of current applied to the electric motor by the control device 100.

The output shaft 110 is provided with a driving force source rotation speed sensor (crank angle sensor) 111 that detects the rotation speed of the driving force source 109.

The driving force source rotation speed sensor 111 is electrically connected to the control device 100.

The rotation speed of the driving force source 109 detected by the driving force source rotation speed sensor 111 is input to the control device 100.

Turbine runner 107, automatic transmission oil; connected (ATF A utomatic T ransmission F luid ) fluidly pump impeller 106 through.

The stator 108 is interposed between the pump impeller 106 and the turbine runner 107.

The input side of the transmission 105 is mechanically connected to the turbine shaft 112 driven by the turbine runner 107.

The output side of the transmission 105 is mechanically connected to the propeller shaft 113.

A differential 114 is mechanically connected to the propeller shaft 113.

A drive shaft 115 is mechanically connected to the differential 114.

A drive wheel 116 is attached to the drive shaft 115.

The turbine shaft 112 is provided with a torque converter output rotation speed sensor 117 that detects the output rotation speed of the torque converter 104 (the rotation speed of the turbine shaft 112).

The torque converter output rotation speed sensor 117 is electrically connected to the control device 100.

The output rotation speed of the torque converter 104 detected by the torque converter output rotation speed sensor 117 is input to the control device 100.

The control device 100 includes the processing unit 118 and the storage unit 119, and executes the following control on the vehicle 102 equipped with the torque converter type transmission 101.

The following control is executed, for example, at a predetermined cycle while the vehicle 102 is traveling.

As shown in FIG. 2, in step S101, the load torque of the torque converter 104 (the driving force source 109 is the torque converter) is based on the capacitance coefficient of the torque converter 104 based on the speed ratio of the torque converter 104 and the rotation speed of the driving force source 109. The torque received from 104) is determined.

The speed ratio of the torque converter 104 is determined by substituting the output rotation speed of the torque converter 104 and the input rotation speed of the torque converter 104 (the rotation speed of the pump impeller 106) into the equation (1).

e = N _o / N _i ··· formula (1)
e: speed ratio N _o: output speed of the torque converter 104 [rpm]
_Ni : Input rotation speed of torque converter 104 [rpm]

Since the torque converter 104 and the driving force source 109 are mechanically connected via the output shaft 110, the input rotation speed of the torque converter 104 is the rotation speed of the driving force source 109 as shown in the equation (2). Matches with.

N _i = N _e・ ・ ・ Equation (2)
_Ni : Input rotation speed of torque converter 104 [rpm]
_Ne : Rotation speed of driving force source 109 [rpm]

The capacitance coefficient of the torque converter 104 is a characteristic value that depends on the structure of each torque converter 104. As shown in the equation (3), the torque converter uses the input torque of the torque converter 104 and the input rotation speed of the torque converter 104. It is represented by a function of the speed ratio of 104.

C (e) = _Ti / N _i ² ... Equation (3)
C: Capacity coefficient of torque converter 104 [Nm / rpm ² ]
e: speed ratio T _i: input torque of the torque converter 104 [Nm]
_Ni : Input rotation speed of torque converter 104 [rpm]

The control device 100 stores in advance a map showing the relationship between the speed ratio of the torque converter 104 and the capacitance coefficient of the torque converter 104.

The control device 100 determines the capacitance coefficient of the torque converter 104 from the speed ratio of the torque converter 104 by referring to the map.

Since the torque converter 104 and the driving force source 109 are mechanically connected via the output shaft 110, the input torque of the torque converter 104 matches the load torque of the torque converter 104 as shown in the equation (4). To do.

T _i = T _e ... Equation (4)
_Ti : Input torque of torque converter 104 [Nm]
_Te : Load torque of torque converter 104 [Nm]

As a result, the load torque of the torque converter 104 is determined by substituting the capacitance coefficient of the torque converter 104 and the input rotation speed of the torque converter 104 into the equation (3) using the equation (4).

Next, in step S102, the excess / deficiency torque is determined based on the load torque of the torque converter 104 and the target torque based on the accelerator opening degree.

In the process in which the torque generated by the driving force source 109 is transmitted to the driving wheels 116 and the vehicle 102 is finally accelerated or decelerated, the torque generated by the driving force source 109 is caused by friction or the like. Since a transmission loss is involved, the target torque referred to in this embodiment is the torque finally obtained by subtracting the transmission loss from the torque generated by the driving force source 109 (the torque actually generated, that is, the effective shaft torque). ) Means.

The control device 100 stores in advance a map showing the relationship between the accelerator opening degree and the target torque.

The control device 100 determines the target torque from the accelerator opening degree by referring to the map.

As a result, the excess / deficiency torque is determined by subtracting the load torque of the torque converter 104 from the target torque determined from the accelerator opening using the map.

After that, in step S103, the indicated value to the driving force source 109 is determined in consideration of the excess / deficiency torque.

The indicated value means an indicated fuel injection amount to the internal combustion engine when the driving force source 109 is an internal combustion engine.

When the driving force source 109 is an electric motor, it means the amount of current applied to the electric motor.

That is, the indicated value means any value instructed to the driving force source 109 when adjusting the rotation speed of the driving force source 109 or the torque of the driving force source 109.

There are several methods to determine the indicated value in consideration of the excess / deficiency torque, but the target torque is corrected based on the excess / deficiency torque, and the indicated value is determined based on the corrected target torque, or the indicated value is determined based on the target torque. A method of determining the value, correcting the indicated value based on the excess / deficiency torque, and determining the final indicated value can be considered.

That is, the indicated value may be indirectly corrected by correcting the target torque, or the indicated value may be directly corrected by correcting the indicated value itself.

In the former method, the target torque is corrected by adding the excess or deficiency torque to the target torque, and the indicated value is determined based on the corrected target torque.

When determining the indicated value by the former method, the indicated value may be determined from the corrected target torque by referring to a conventional map showing the relationship between the target torque and the indicated value.

Therefore, in the former method, it is not necessary to create a new map when realizing this method, and the realization cost can be reduced.

In the latter method, the indicated value is determined by referring to the conventional map showing the relationship between the target torque and the indicated value, and the excess or deficiency is determined by referring to the new map showing the relationship between the excess / deficiency torque and the corrected value. The correction value is determined from the torque, and the final instruction value is determined by adding (adding, subtracting, integrating or dividing) the correction value to the indicated value.

Finally, in step S104, the indicated value is instructed to the driving force source 109.

As described above, since the control device 100 controls the indicated value with high accuracy in consideration of excess / deficiency torque, it is more suitable for the driving force source 109 according to the required acceleration than the conventional open loop control. You can give an indicated value.

This control can be expected to be applied to control that suppresses the start at lock-up / off, the response delay at chip-in acceleration or let-off deceleration, the excess / deficiency of response G, or the occurrence of vibration.

In the present embodiment, the calculation cost is reduced by using a map when determining the capacitance coefficient, the target torque, the indicated value, and the correction value. However, in addition to using the map, Other methods such as calculation can be adopted.

Further, in the present embodiment, the load torque of the torque converter 104 is determined, the excess / deficiency torque is determined based on the load torque and the target torque, and the indicated value to the driving force source 109 is set in consideration of the excess / deficiency torque. It is determined and the indicated value is instructed to the driving force source 109, but the excess / deficiency acceleration is determined based on the actual acceleration of the vehicle 102 and the required acceleration, and the excess / deficiency acceleration is taken into consideration to the driving force source 109. The same effect can be obtained by determining the indicated value and instructing the indicated value to the driving force source 109.

For example, the actual acceleration of the vehicle 102 can be calculated by differentiating the speed of the vehicle 102, and the required acceleration can be determined based on the accelerator opening degree. Further, the excess / deficiency acceleration can be determined based on the difference between the actual acceleration of the vehicle 102 and the required acceleration.

100 Control device 101 Torque converter type transmission 102 Vehicle 103 Accelerator opening sensor 104 Torque converter 105 Transmission 106 Pump impeller 107 Turbine runner 108 Stator 109 Driving power source 110 Output shaft 111 Driving power source rotation speed sensor 112 Turbine shaft 113 Propeller shaft 114 Differential 115 Drive shaft 116 Drive wheel 117 Torque converter Output rotation speed sensor 118 Processing unit 119 Storage unit

Claims (5)

A vehicle control device equipped with a torque converter type transmission.
The load torque of the torque converter is determined based on the capacitance coefficient of the torque converter based on the speed ratio of the torque converter and the rotation speed of the driving force source, and the excess / deficiency torque is determined based on the load torque and the target torque based on the accelerator opening. The control device is configured to determine the specified value, determine the indicated value to the driving force source in consideration of the excess / deficiency torque, and indicate the indicated value to the driving force source. When determining the indicated value in consideration of the excess / deficiency torque, the claim is further configured to correct the target torque based on the excess / deficiency torque and determine the indicated value based on the corrected target torque. Item 1. The control device according to item 1. When determining the indicated value in consideration of the excess / deficiency torque, the indicated value is determined based on the target torque, the indicated value is corrected based on the excess / deficiency torque, and the final indicated value is determined. The control device according to claim 1, further configured. The driving force source is composed of an internal combustion engine.
The control device according to any one of claims 1 to 3, wherein the indicated value means an indicated fuel injection amount. The driving force source is composed of an electric motor.
The control device according to any one of claims 1 to 3, wherein the indicated value means an applied current amount.

Images