192 clutches and power-stop control – Transmission control and clutch control – Common control
Reexamination Certificate
1999-08-03
2001-05-15
Bonck, Rodney H (Department: 3681)
192 clutches and power-stop control
Transmission control and clutch control
Common control
C074S335000, C074S337500
Reexamination Certificate
active
06230862
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to actuating arrangements, particularly for motor vehicles with an engine, a torque transmitting system such as a friction clutch, and a transmission such as for example a change speed gear.
The invention further relates to a method of initiating, such as controlling or regulating, the actuation of a torque transmitting system and/or of a transmission for automated operation of these aggregates.
2. Discussion of the Related Art
Such actuating arrangements serving the purpose of automated actuation of transmissions and/or clutches exhibit the advantage of a comfortable gear shifting and/or clutch actuating operation which can be initiated by the driver of the vehicle, such as particularly a passenger car or a truck, or is started automatically on the basis of an implemented program due to operating conditions and the values of operational parameters.
Such actuating arrangements became known for automated initiation of the automated gear shifting and gear ratio selecting operation of a change speed gear.
These actuating arrangements, which are especially suitable to automate the gear shifting and the gear ratio selecting operations, comprise an actor, such as a hydraulic cylinder, for each of the gear shifting and gear ratio selecting operations so that the actuations for the purposes of gear shifting and gear ratio selecting can be carried out independently of each other. Furthermore, automated circuits require an additional actor which serves to actuate the clutch, i.e., a discrete actor is required for each of the actuating functions.
There is further known an actuating arrangement of the above outlined character which is designed to effect the initiation of the gear shifting and gear ratio selecting operations by way of shifting cylinders. Such shifting cylinders are disposed in the interior of the transmission.
For the purposes of a planned initiation of operation of a transmission, it can be of advantage to take into consideration protective functions or undertakings in the course of an automated gear shifting operation for the transmission ratios of the transmission. For example, such functions protect the transmission and/or the actuating arrangement from damage in the event of an erroneous actuation or for example during bringing of the gears into mesh. The present invention draws, in addition, attention to the earlier German application DE 19609924 the disclosure of which is hereby incorporated by reference, and is, therefore, to be considered unequivocally as forming part of the disclosure of the present application.
Furthermore, it can be of advantage in accordance with the invention if the aforementioned torque transmitting system is to be actuated, for example, in accordance with the torque follow-up method. The torque follow-up method determines the selected transmissible torque essentially on the basis of the then existing engine torque and the transmissible torque, such as clutch torque, is disposed within the range of certain predeterminable tolerances below, at or above the actually prevailing engine torque. The present invention further relates to that disclosed in German aplication No. 19504847 the disclosure of which is also hereby incorporated by reference, and is, therefore, to be considered unequivocally as forming part of the present application.
SUMMARY OF THE INVENTION
An object underlying the present invention is to to provide arrangements of the above outlined character which can be produced with a relatively small outlay for parts and materials and which can be installed, in a simple manner and wise, on a transmission or a clutch bell for automated initiation of a gear shifting, gear ratio selecting and/or clutch actuating operation.
A further object of the invention is to provide an integrated actuating arrangement by means of which the operation of a transmissiom and of a torque transmitting system can be initiated in a planned manner.
A further object of the invention is to provide an actuating arrangement which reduces the number of actors as a result of the utilization of transfer gearings.
A further object of the invention is to provide an arrangement which can be constructed in a simpler manner due to the fact that it takes advantage of periodicities in the gear shifting and/or gear ratio selecting and/or clutch actuating operation and, as a result thereof, exhibits for example a smaller size so that it requires a smaller amount of space for installation.
It is a further object to provide an arrangement which is simple and can be constructed in an inexpensive manner.
In accordance with the invention, this is accomplished in an actuating arrangement of the above outlined character, especially for motor vehicles with an engine, a torque transmitting system such as a friction clutch, and a transmission, wherein the torque transmitting system comprises a first means for initiating and/or discontinuing the transmission of torque or for regulating the torque which can be transmitted by the torque transmitting system, and wherein the transmission comprises at least one second means for initiating the gear shifting operation within the gear shifting paths and, if necessary, a third means for the initiation of the gear ratio selecting operation between the gear shifting paths, in that an electronic control or regulating unit serves to operate at least one actor which is arranged to activate in a planned manner one of the three means for the regulation of the clutch actuating, gear shifting or gear ratio selecting operation.
Furthermore, it can be of advantage in an actuating arrangement of the above outlined character, particularly for motor vehicles with an engine, a torque transmitting system such as a friction clutch, and a transmission, wherein the torque transmitting system comprises a first means for initiating and/or discontinuing the transmission of torque or for regulating the torque which can be transmitted by the torque transmitting system, and wherein the transmission comprises at least one second means for initiating the gear shifting operation within the gear shifting paths and, if necessary, a third means for the initiation of the gear ratio selecting operation between the gear shifting paths, if an electronic control or regulating unit serves to operate two actors one of which is arranged to actuate in a planned manner two of the three means for the initiation of the clutch actuating, gear shifting and gear ratio selecting operations and the other of which is arranged to actuate in a planned manner the third means for the initiation of the clutch actuating, gear shifting and/or gear ratio selecting operation.
Furthermore, it can be of advantage if the electronic control or regulating unit actuates two actors one of which is arranged to actuate in a planned manner two of the three means for the initiation of the clutch actuating, gear shifting and/or gear ratio selecting operations and the other of which is arranged to actuate in a planned manner two of the three means for the initiation of the clutch actuating, gear shifting and gear ratio selecting operations.
In accordance with the invention, it is of advantage if the first actor actuates the means for coupling and selecting, and the second actor actuates the means for coupling and shifting.
In accordance with the invention, it is also of advantage if the first actor actuates the means for shifting and selecting, and the second actor actuates the means for coupling and shifting.
Furthermore, it is of advantage in accordance with the invention if the first actor actuates the means for coupling and selecting, and the second actor actuates the means for shifting and selecting.
Furthermore, it can be of advantage if an electronic control or regulating apparatus initiates the operation of an actor which actuates in a planned manner the three means for the initiation of the clutch actuating, shifting and/or selecting operation.
Still further, this is accomplished in accordance with the present invention in that t
Esly Norbert
Reik Wolfgang
Bonck Rodney H
Darby & Darby
LuK Getriebe-Systeme GmbH
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