WO2015067266A1

WO2015067266A1 - Operating device for controlling a drive train

Info

Publication number: WO2015067266A1
Application number: PCT/DE2014/200558
Authority: WO
Inventors: Erhard Hodrus
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2013-11-07
Filing date: 2014-10-16
Publication date: 2015-05-14

Abstract

The invention relates to an operating device for controlling a transmission in a drive train on board a motor vehicle, comprising an input device for providing a control signal for the transmission based on driver-controlled input and a control device for controlling the transmission based on the control signal of the input device. Said input device is designed to provide a control signal for at least one additional controllable component on board the motor vehicle.

Description

Actuator for a powertrain control

The invention relates to an actuating device on board a motor vehicle. In particular, the invention relates to an actuator for controlling a reduction in a drive train on board a motor vehicle.

A motor vehicle includes an internal combustion engine which acts by means of a clutch on a transmission, which in turn is coupled to a drive wheel of the motor vehicle. The transmission is electrically controllable to engage one of several possible gear ratios. If it is a continuously variable transmission (CVT), several virtual gear stages can be electrically controlled. The transmission may also comprise a dual-clutch transmission, wherein additionally two clutches are controllable. The control of transmission and clutches can generally be done electrically or hydraulically.

In order to control the reduction of the transmission, usually a control device is provided, which provides the necessary control signals for the transmission and the clutch depending on a driving condition of the motor vehicle and optionally a control signal of a control element.

For historical or traditional reasons, the control element is often modeled on a mechanical shift lever and attached to the position in the motor vehicle to which the shift lever was previously found, namely, for example, between the front seats at a well-reachable place of a dashboard or the steering wheel.

This position can restrict the freedom of movement of a driver or passenger on board the motor vehicle. In addition, another control element that is commonly used in a modern motor vehicle in this area, such as a navigation device, not or only badly used.

DE 10 2005 008 383 A1 shows an actuating device for an automated transmission. DE 10 2005 029 567 A1 shows an electromechanical parking brake for an automatic or automated transmission. The invention has for its object to provide an improved actuator for controlling a reduction in a drive train on board a motor vehicle. Another object is to specify a method for controlling the reduction. The invention achieves these objects by means of the subject matters of the independent claims. Subclaims give preferred embodiments again.

An actuating device according to the invention for controlling a transmission in a drive train on board a motor vehicle comprises an input device for providing a control signal for the transmission on the basis of a driver-controlled input and a control device for controlling the transmission on the basis of the control signal of the input device. In this case, the input device is set up to provide a control signal for at least one further controllable component on board the motor vehicle.

As a result, several operating elements for the motor vehicle can be integrated with one another in the actuating device. A complexity of the motor vehicle can thereby be reduced or at least encapsulated. A driver can thereby operate the motor vehicle more easily. The actuating device can be positioned more freely in the area of the driver of the motor vehicle. This increases a degree of freedom in the design of the interior of the motor vehicle. By eliminating a dedicated input device for transmission control, in particular a selector lever, the control of the transmission can be implemented more cheaply. Furthermore, by saving a heavy selector lever, a total weight of the motor vehicle can be reduced, whereby an environmental impact, such as carbon dioxide, can be reduced.

Preferably, the input device provides an electrical control signal. As an electrical or electronic component, the input device can be designed inexpensively and flexibly. In a particularly preferred embodiment, the input device comprises a touch-sensitive screen. The touch-sensitive screen may be used for interactive input and output to control the transmission and optionally also the at least one further controllable component.

The other component preferably includes one of an air conditioner, an entertainment electronic component, and an on-board computer. The at least one other component can thus be controlled in an integrated manner with the control of the transmission become. Ergonomics and intelligibility of the operation of the input device can thus be improved.

Preferably, the transmission comprises a dual-clutch transmission. Control signals for the transmission may cause engagement of shift stages of a park position, a reverse gear, a neutral position, and a drive position on the transmission. In one embodiment, a separate electromechanical actuator for locking the parking position may be provided. In a further embodiment, the parking position can not be explicitly offered to the driver of the motor vehicle for insertion. As a result, the control of the transmission for the driver can be simplified. In still another embodiment, an actuator for locking the parking position can be saved.

In one embodiment, the control device is configured to control the transmission only for engaging a gear, if during the input for inserting the gear, a brake of the motor vehicle is actuated and the motor vehicle is at a standstill. The insertion of the gear from the stoppage of the motor vehicle can be particularly secure. For example, it can be ensured that the motor vehicle does not set in motion unintentionally. Even an impermissible actuation of the transmission by a passenger can be prevented.

In a further embodiment, the control device is set up to protect an insertion of a drive stage by means of an additional input at the input device. The additional input can in particular be made before or after the input for inserting the drive level. Abuse or unintentional engagement of the gear stage can thus be prevented.

In one variant, the additional input comprises a predetermined code. The

Motor vehicle can be secured thereby improved against theft. Also, an operation by an unauthorized person, such as a passenger or a child playing, can be prevented.

If the input device comprises a touch-sensitive screen, then the control device can be set up to enlarge an illustration of a control element for controlling the transmission when the motor vehicle is at a standstill and to reduce it when the motor vehicle is moving. A control surface based on the beta is displayed by means of which the control of the transmission can be performed, can be adapted in this way dynamically to the likelihood or importance of their operation. If it is less important or less likely that the transmission needs to be controlled, space for the representation of another control component can be created by the reduced representation of the corresponding control surface on the touch-sensitive screen. The motor vehicle can be controlled so easily.

In a further embodiment, the control device is set up to determine that a driving situation of the motor vehicle is present in which an operation of the transmission is not to take place, and to hide an illustration of a control surface for controlling the transmission. By hiding the driver can be signaled that currently a control of the transmission can not be performed by him. This condition can be intuitively understood by the driver. An output of an error message or, for example, a warning tone in an attempt to request an unworkable control of the transmission, so is not required.

An inventive method for controlling a transmission in a drive train on board a motor vehicle comprises steps of sampling a control signal of a driver-actuated input by means of an input device, wherein the input device is adapted to provide a control signal for the drive train and at least one further component on board the motor vehicle, and providing a control signal for the transmission based on the control signal of the input device.

The invention will now be described in more detail with reference to the attached figures, in which:

1 shows a motor vehicle with an actuating device for controlling a transmission;

FIG. 2 is a flow chart of a method for controlling the transmission of FIG. 1 and FIG

Figure 3 illustrates exemplary representations of an input device of the actuator of Figure 1. FIG. 1 shows a motor vehicle 100 with an actuating device 105. The actuating device 105 comprises an input device 110 and a control device 15. The motor vehicle 100 comprises a drive train 120 with a transmission 125. The drive train 120 preferably also comprises a drive motor 130 and at least one drive wheel 135. Between the drive motor 130 and the gear 125, a clutch 140 may be provided. To control the transmission 125, the clutch 140 can also be controlled. In a preferred embodiment, the transmission 125 includes a dual clutch transmission and the clutch 140 a dual clutch. The transmission 125 can preferably be controlled to engage one of several possible switching stages. Some of the stages may be in the form of a dedicated mechanical reduction, while other stages may be virtually done by the control of the transmission 125 and the clutch 140. For example, idling may be controlled by both clutches of dual clutch 140 being driven to disconnect. An automatic drive stage, which is usually denoted by D, may include the automatic insertion of different pairs of gearwheels in the transmission 125 depending on a driving state of the motor vehicle 100.

Control signals for controlling the transmission 125 and the clutch 140 are provided by the controller 1 15 in response to a driver-controlled input by means of an input device 145. The input device 145 is set up, controlled by an input of a driver, to provide a control signal for the control device 15 and at least one further component 150 on board the motor vehicle 100. The further component 150 can be controlled directly by the input device 145 or indirectly by the control device 15. Examples of other components 150 include an air conditioner, entertainment electronic component such as a radio, an MP3 player or a DVD player, and an on-board computer, for example, to display navigation or fuel consumption values of the motor vehicle 100. Typically, the motor vehicle 100 further includes a brake 155 for braking one of the drive wheels 135 or another wheel, wherein an actuation state of the brake 155 can be scanned by the control device 1 15 in an optional embodiment.

The input device 145 preferably comprises a touch-sensitive screen. As will be explained in more detail below with reference to FIG. 3, an input area assigned to a function of the motor vehicle 100 can be displayed on a display surface of the input device 145. By touching the input surface, the assigned function can be controlled by providing an appropriate control signal becomes. In this case, the operating surface, for example, depending on their importance or the probability of their actuation depending on a driving condition of the motor vehicle 100, in different ways, in particular in different sizes or colors, are displayed.

FIG. 2 shows a flowchart of a method 200 for controlling the transmission 125 of FIG. 1. By way of example, an input device 145 is assumed, which comprises a touch-sensitive screen, but it is also possible to use another input device for outputting control signals for a plurality of control devices. The method 200 is set up in particular for running on the control device 15.

In an optional first step 205, a driving state of the motor vehicle 100 is determined. The driving state may include, for example, a vehicle speed, an acceleration or a travel time after the last stop. In a subsequent step 210, a control surface for operating the transmission 125 is displayed on a display surface of the input device 145. The operating surface can be determined depending on the operating state of the motor vehicle 100.

In a step 215, a driver-controlled input is detected by means of the input device 145 on the basis of a corresponding control signal. In a step 220, it is determined whether the input or the touched operating area concerns the control of the transmission 125. If this is not the case, then the affected component 150 can be determined in a step 225 and a control signal for controlling the specific component can be output in a step 230. The method 200 may then return to the beginning and go through again.

If the control signal relates to the transmission 125, a step 235 may optionally include a

Be scanned security input. The security input may include, for example, touching a particular button for confirmation or entering a predetermined code. In a step 240, it is determined whether the hedging input is present or correct. An entered code can be compared with the predetermined code. The code may be determined, for example, by a number and / or letter combination or by a predetermined gesture on the input device 145. In a step 240, it is determined whether the hedge input is present or the inputted code correct is. If this is not the case, an error message can be output in a step 245 before the method 200 returns to the beginning.

Otherwise, a boundary condition may optionally be detected in a step 250. An exemplary boundary condition could be the stoppage of the motor vehicle 100 or the actuation of a brake 155 of the motor vehicle 100. In a step 255 it is checked whether the boundary condition exists. If it does not exist, then the method 200 may proceed to step 245 and optionally issue an error message. Otherwise, if the boundary condition exists, in step 260, a control signal for driving the transmission 125 is provided. In addition, a further control signal for actuating the clutch 140 can be provided. In certain driving conditions, the driving of the transmission 125 can also take place exclusively by the activation of the clutch 140, for example when engaging an idling, when the transmission 125 comprises a dual-clutch transmission.

FIG. 3 shows exemplary representations of the input device 145 from FIG. 1. Here again, without limiting the generality, it is assumed that the input device 145 comprises a touch-sensitive screen. A first exemplary representation in FIG. 3A relates to the standstill of the motor vehicle 100. A control surface 305 for controlling the transmission 125 is relatively large and is shown prominently on the input device 110. Other control surfaces 310 and 315 may relate, for example, to the control of an air conditioning system or a radio on board the motor vehicle 100. Yet another control surface 320 relates to a navigation system in the exemplary representation of FIG.

FIG. 3B shows the input device 110 in a different driving state of the motor vehicle 100, in particular when the motor vehicle 100 is already in motion. The operating surface 305 for operating the transmission 125, together with explanatory displays, shown reduced in size compared to the illustration of Figure 3A. Actuation of the control surface 305 is assumed to be less likely or less urgent, which is reflected in the reduced size of the control surface 305. In the illustrated embodiment, one or more of the further control surfaces 310, 315 may be shown at a different position on the input device 110. The additional control surface 320 is shown as an example larger. FIG. 3C shows the input device 145 in yet another exemplary driving state of the motor vehicle 100. Here, control of the transmission 125 by the driver is not desired or not possible. The control surface 305 for controlling the transmission 125 is not shown on the input device 110 at all, together with the illustrative displays illustrated above. As a result, optionally the further operating elements 310, 315 can be displayed again at a different position on the input device 110. In addition, one or more additional control surfaces 325 can optionally be displayed.

LIST OF REFERENCE NUMBERS

100 motor vehicle

105 actuating device

1 10 input device

1 15 control device

120 powertrain

125 gearbox

130 drive motor

135 drive wheel

140 clutch

145 input device

150 more components

200 procedures

205 Detecting the operating state of the motor vehicle

210 Represent control surface gear

215 Detecting driver-controlled input

220 input concerns transmission control?

225 Determine affected component

230 taxes component

235 Capture Hedge Input

240 Protection input is present / correct?

245 Output error message

250 Detect boundary condition

255 boundary condition exists?

260 Drive gearbox

305 control surface

310 additional control surface (air conditioning)

315 additional control surface (radio)

320 additional control surface (navigation system)

325 additional control surface

Claims

Patent claims

Actuating device (105) for controlling a transmission (125) in a drive train (105) on board a motor vehicle (100), the actuating device (105) comprising the following:

an input device (145) for providing a control signal to the transmission (125) based on a driver-controlled input;

a control device (1 15) for controlling the transmission (125) based on the sampled control signal of the input device (145),

characterized in that

the input device (145) is set up to provide a control signal for at least one further controllable component (150) on board the motor vehicle (100).

Actuating device (105) according to claim 1, wherein the input device (145) comprises a touch-sensitive screen.

Actuating device (105) according to one of the preceding claims, wherein the further component (150) comprises one of an air conditioning system, a consumer electronic component and an on-board computer.

Actuating device (105) according to one of the preceding claims, wherein the transmission (125) comprises a dual clutch transmission.

Actuating device (105) according to one of the preceding claims, wherein the control device (1 15) is set up to control the transmission (125) to engage a gear level only if a brake (155) of the motor vehicle (155) of the motor vehicle ( 100) is actuated and the motor vehicle (100) is at a standstill.

Actuating device (105) according to one of the preceding claims, wherein the control device (1 15) is set up to ensure that a gear is engaged by means of an additional input on the input device (145).

The actuator (105) of claim 7, wherein the additional input comprises predetermined code.

8. Actuating device (105) according to one of claims 2 to 8, wherein the control device (1 15) is set up to show an enlarged representation of an operating element (305) for controlling the transmission (125) when the motor vehicle (100) is in Standstill and reduced in size when the motor vehicle (100) moves

9. Actuating device (105) according to one of claims 2 to 9, wherein the control device (1 15) is set up to determine that there is a driving situation of the motor vehicle (100) in which the transmission (125) should not be operated , and to hide a representation of a control surface (305) for controlling the transmission (125).

10. Method for controlling a transmission (125) in a drive train (105) on board a motor vehicle (100), the method comprising the following steps:

Sampling (315) a control signal of a driver-operated input by means of an input device (145),

wherein the input device (145) is designed to provide (230) a control signal for the drive train and at least one further component on board the motor vehicle (100), and

Providing (260) a control signal for the transmission (125) based on the sampled control signal.