DE10213945A1 - Method for controlling and/or regulating automated clutch and/or transmission in vehicles involves engaging engine at least before and/or directly after opening clutch during gear change - Google Patents

Abstract

The engine is engaged at least before and/or directly after opening the clutch during a gear change. The engine can be engaged when the clutch is slip-free and the gear change is not yet initiated or when the clutch is slip-free and the gear change is initiated. Engine engagement can be initiated during a change-down.

Description

The invention relates to a method for controlling and / or regulating a automated clutch and / or an automated transmission of a driving Stuff, in particular a motor vehicle in which an engine intervention leads.

Automated clutches and / or automated ones are from vehicle technology Known transmission with which automation of a drive train Vehicle, in particular a motor vehicle is made possible.

In the known method, engine intervention is used. In overrun mode of the engine is the engine intervention after opening the clutch and the He take out of the aisle provided. This is supposed to bring the engine speed to a Target speed can be adjusted in lower gear. However, it has been shows that there may be a discontinuity in the course of the engine speed, which can lead to so-called spitting in the engine. About that in addition, with this type of engine intervention in the known method Drive train tension are generated, resulting in a so-called light  Clicks of the drive train. This will make the entire To powertrain exposed to increased loads.

The invention has for its object a method for controlling and / or Regulating an automated clutch and / or an automated transmission to create a vehicle in which the engine behavior when changing gear optimized and disengagement shocks due to tension in the drive strand be avoided.

This object is achieved by the features of the claim 1 solved.

Accordingly, in particular before a gear change z. B. an adjacent Thrust torque of the engine advantageously reduced by engine intervention be adorned, thereby reducing tension in the drive train without that the engine ei when the clutch is opened, i.e. when changing gear has a drop in the speed curve. By this measure according to the invention for example, an additionally provided engine intervention during the gear change are supported in an advantageous manner. In the invention The procedure according to the engine behavior before and during the gear alternately optimized and disengagement strikes avoided in an advantageous manner. Consequently are the total loads on the drive train of the vehicle the method according to the invention is minimized.  

According to a development of the invention, for. B. an excessive engine handle preferably be provided in overrun downshifts. there the engine torque can be appropriately increased to suit the gear change prepare and optimize the engine behavior of the vehicle. Selbstver Of course, the engine torque can also be influenced in another way to optimize the engine and transmission behavior of the vehicle.

Another development of the invention can provide that the engine intervention is provided if the clutch is still slip-free and a gear change is not provided. For example, a command or an intention have already been generated for changing gears, but are still no shares vities regarding a corresponding clutch and transmission actuation has been started.

It is also possible according to the present invention that the engine intervention is carried out when the clutch is slip-free and the gear change is already in progress has been initiated. For example, there may be the case that begon nen was pulling out the aisle. Furthermore, a so-called Prestressing phase.

According to a development of the present invention, it is also conceivable that the Engine intervention is carried out when the clutch is already essentially open is not. However, the engine intervention could already be carried out if the clutch is at least slipping. For example, this could be at the beginning of the  Be opening phase of the clutch, in which the clutch is not yet essentially chen but z. B. is partially open.

The motor intervention in the method according to the invention can preferably be carried out with Downshifts are performed. It is particularly advantageous with the present invention when engaging with engine downshifts is used.

According to a development of the invention, the invention can Procedures also include a reducing engine intervention to chip degrade in the drive train. For example, the reducing Engine intervention z. B. be carried out before upshifts. This can in the method according to the invention, a so-called touring of the engine be prevented. In addition, disengagement shocks can also occur when opening the clutch and / or when pulling out the gear can be avoided.

Another embodiment of the present invention can provide that the engine torque is suitably influenced by the intended engine intervention becomes. For example, the engine torque can be limited at the top the. Through this predetermined engine intervention in the invention procedures reduced load change reactions in certain driving situations or avoided. Especially with the so-called tip-in as well the so-called back-out can advantageously in the vehicle to be watched.  

According to a further development, the The present invention provides that the selected limit for the Mo Torque moment z. B. above the moment set or desired by the driver lies. Of course, in the method according to the invention also whose limits or limit values of the engine torque are provided in order to Further optimize procedures. The clutch has torque tracking on the one hand the function that the shortest possible travel of the gearbox at a There is an intention to switch and that load change reactions, especially with the Tip-in, can be minimized by premature slip on the clutch.

With the automated transmission, the first one is in the so-called drive-mote named function of moment tracking without meaning. By inventing The method according to the invention makes the load change reaction of the vehicle opti mated, so that the second function is irrelevant and therefore the Coupling can advantageously remain closed while driving.

Furthermore, the engine intervention in the method according to the invention a clutch protection function can be implemented in the vehicle. Thereby, that the engine torque is limited, for example, at the Adverse destruction can be avoided. Once the clutch due to wear or a low coefficient of friction, which, for. B. due excessive heating may exist, is no longer able, even in ge closed state the pending engine torque to the drive train  transmitted, the engine torque to be transmitted is re according to the invention caused that the clutch no longer slipped even when closed arises. The clutch can thus advantageously before a faster Wear are protected because the clutch corresponds to the engine intervention is cooled accordingly. This can increase the friction coefficient of the clutch again be so that e.g. B. the transmitted engine torque can be increased again.

The method according to the invention can be used both in automated transmissions (ASG) as well as for automated couplings (EKM). Of course, this method can also be used with other clutch and / or Gear systems are used.

Further advantages and advantageous configurations of the invention result from the dependent claims and from the drawing.

Show it:

FIG. 1 shows curves of the transmission speed, the engine speed and the engine torque at an engine engagement during a gear change according to a known prior art method; and

Fig. 2 curves of the transmission speed, the engine speed and the engine torque in the engine intervention according to the inventive method.

In Figs. 1 and 2 the period of time during the change-GW is shown in gray. In Fig. 1, an excessive engine intervention is provided during the gear change in a thrust downshift. Reference number 1 identifies the step-like course of the transmission speed N_gearbox. This course causes a so-called clicking of the drive train of the vehicle.

With the reference number 2 , the excessive engine torque intervention in the known method be identified. The increase in engine torque M_Motor, which is shown by the broken line in Fig. 1, is carried out in the known method only during the gear change. With the reference number 3 different courses of the engine speed N_Motor with and without engine intervention are marked, the course of the engine speed N_Motor with engine intervention being dashed and the course of the engine speed N_Motor without engine intervention is shown as a solid line. In the course of the engine speed N_Motor with engine intervention, the increase in engine speed N_Engine becomes clear through the engine intervention.

In Fig. 2 the überhöhende engine intervention is prepared according to the methods of the invention, the course of the engine torque M_Motor and the course of engine speed N_engine each with a dashed line and the curve is the transmission speed N_Getriebe by a solid line indicates is.

In the method according to the invention, in contrast to the known method, the engine intervention is carried out before the gear change. This makes the transition more steady when disengaging or removing the gear. In particular, the clicking of the drive train can be avoided. Furthermore, the decrease in engine speed N_Motor at time 1 is also significantly reduced in the method according to the invention,

The increase in engine speed N_Motor can, as can be seen from the dashed line in FIG. 2, take place more uniformly. As a result, the intermediate gas does not cause the engine to spit. The sporty character caused by the acoustics of the speed increase occurs earlier in the method according to the invention in an advantageous manner.

From the dashed curve of the engine torque M_Motor in Fig. 2 it is clear that the engine torque M_Motor is increased before the gear change, which causes a better adaptation to the engine speed N_Motor, because the torque integral is greater due to the time expansion. As a result, the coupling according to the invention can also be made more comfortable with regard to the temporal sequence.

The claims submitted with the application are drafted strikes without prejudice for obtaining further patent protection. The An  notifier reserves the right to add more, so far only in the description and / or To claim drawings disclosed combination of features.

Relationships used in subclaims point to further training the subject of the main claim by the features of the respective towards subclaim; they are not considered a waiver of achieving one independent, objective protection for the combinations of features of to understand related subclaims.

Since the subjects of the subclaims with regard to the prior art reserves the right to make its own independent inventions on the priority date Applicant before becoming the subject of independent claims or part to make statements of compliance. You can also continue to invent independently containing one of the subjects of the preceding subclaims have independent design.

The exemplary embodiments are not to be understood as a limitation of the invention hen. Rather, there are numerous variations within the scope of the present disclosure Rations and modifications possible, especially such variants, elements and combinations and / or materials, for example by combination or modification of individual in connection with that in the general Be writing and embodiments and the claims described and in the features or elements contained in the drawings or procedural step ten for the expert with regard to the solution of the task are removed  and through combinable features to a new item or new ones Lead process steps or process step sequences, also insofar as they Test and work procedures concern.

Claims (10)

1. A method for controlling and / or regulating an automated clutch and / or an automated transmission of a vehicle, in particular a motor vehicle in which an engine intervention is carried out, characterized in that the engine intervention at least before and / or immediately after the clutch is opened is carried out when changing gears. 2. The method according to claim 1, characterized in that an excess engine intervention is carried out in which the engine torque is ge suitable is increased. 3. The method according to any one of claims 1 or 2, characterized net that the engine intervention is carried out when the clutch slip-free and the gear change is not yet initiated. 4. The method according to any one of claims 1 to 3, characterized in that the engine intervention is carried out when the clutch is slip-free and the gear change is initiated.   5. The method according to any one of claims 1 to 4, characterized in that the engine intervention is carried out when the clutch at least is partially open. 6. The method according to any one of claims 1 to 5, characterized in that the engine intervention is carried out during a downshift. 7. The method according to claim 6, characterized in that the motor intervention during a thrust downshift is made to off avoid dome knocks. 8. The method according to any one of claims 1 to 7, characterized in that affects the course of the engine torque during engine intervention is flowing. 9. The method according to claim 8, characterized in that the motor torque appropriately limited to avoid load change reactions becomes. 10. The method according to any one of claims 8 or 9, characterized in net that the reduction of the engine torque as clutch protection function is provided.