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US 6,746,367 B2Granted
Method and device for controlling the drivetrain of a motor vehicle during gearshift operations
AssigneeRobert Bosch GmbH
InventorJuergen Loeffler
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AssigneeRobert Bosch GmbH
InventorJuergen Loeffler
Estimating the term…
A coordinated control of a drive train during a gear shift is described. The core of the control lies in establishing an optimal system trajectory for the states of the internal combustion engine and the clutch for the shift operation and in supplying this trajectory to a subordinate control and regulation. Here, the determination of the optimal system trajectory occurs as a function of the stipulations of a higher-order system for controlling the drive train. In particular, it is provided for the optimal system trajectory to be adapted to the driving situation, the driver type, the operating conditions of the assemblies, and the state of the assemblies themselves. Here, the determination of the optimal system trajectory occurs via a real-time optimization algorithm that is executed during driving operation. In this manner, optimal shift operation is attained under all operating conditions that unites a high degree of comfort with a low loss of traction.
A method for coordinated control of a servo clutch, a vehicle engine and a transmission arranged in a drive train of a motor vehicle during a change in a gear ratio, comprising the steps of:
A device for coordinated control of a servo clutch, a vehicle engine and a transmission arranged in a drive train of a motor vehicle during a change in a gear ratio, comprising:
A device for coordinated control of a servo clutch, a vehicle engine and a transmission arranged in a drive train of a motor vehicle during a change in a gear ratio, comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Including control of propulsion units: including control of combustion engines
Conjoint control of vehicle sub-units of different type or different function: including control of driveline clutches
Including control of change-speed gearings: stepped gearings
Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of…:…
Term ended 15 Aug 2022 (estimated)
The present invention relates to a method and device for controlling the drive train of a motor vehicle during gear shift operations.
In vehicles having an automated gear box and an electronically actuated clutch, an automated gear change occurs by triggering the internal combustion engine, clutch, and transmission components. These components must be actuated appropriately such that the gear change occurs as quickly and therefore as comfortably as possible.
Conventional methods for determining the target transmission gear which, besides the direct input variables, also take into account the driving situation, the driver type, and operating conditions when determining the gear. These methods are described in, for example, German Published Patent Application No. 196 25 935 or German Published Patent Application No. 197 03 863.
FIG. 1 is a schematic top view of the present invention.
FIG. 2 illustrates the present invention embedded in a system for controlling the drive train.
FIG. 3 illustrates details of the shifting coordination.
The invention is be described below with reference to example embodiments.
Using a drive train control, in a vehicle with an automated gear box (AGB) and electronically actuated clutch, the change of gears occurs via coordinator 111 of the components engine, clutch, and transmission. FIG. 1 illustrates the system architecture of the drive train control.
The driving torque desired by the driver is calculated by coordinator 111 as a function of relative position hfp of accelerator 110 and transmission output speed n_ga proportional to the vehicle speed. Output engine torque md_ma_soll or the setting of an engine speed n_m_soll is requested by engine control 101a. Clutch control 103a is requested to adjust the clutch in such a manner that it is able to transfer a torque md_ka_soll. Alternatively, it is also possible for the stipulation of a target position or target force of the actuator that actuates automated clutch 103 to be provided.