Transmission system control method and device of automotive vehicle with power branch and gear device
A technology for transmissions and motor vehicles, applied in transmission control, engine control, electrical control, etc., can solve the problems of unstable range conversion, swing enhancement, etc.
Inactive Publication Date: 2004-08-18
SCHAEFFLER TECH AG & CO KG
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AI Technical Summary
Problems solved by technology
[0004] One problem when shifting between ratio ranges of such power branch transmissions is oscillating or unstable range shifting, for example during or later when shifting ranges in a motor vehicle driveline, for example when shifting to high Retraction of the accelerator pedal after a gear will result in a state in which the range shift that just occurred at the intended range shift ratio is canceled again
Feedback to the foot actuating the accelerator pedal may occur due to the impact of the motor vehicle during a range change, thereby increasing the swing
Method used
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[0017] According to FIG. 1 , a crankshaft 2 of an internal combustion engine, not shown, is connected via a starter clutch 4 to a drive shaft 6 of a power branch transmission, designated generally at 8 , the output shaft of which is designated at 10 . The arrows on the crankshaft 2 and the output shaft 10 indicate the direction of the torque flow through the transmission when they are driven by the internal combustion engine, not shown.
[0018] The transmission 8 includes a coupled transmission 12 and a continuously variable transmission 14 with a first pair 16 of cones and a second pair 18 of cones. The first pair of cones is non-rotatably connected to an input shaft 20 of the continuously variable transmission, and the second pair of cones 18 is non-rotatably connected to an output shaft 22 of the continuously variable transmission.
[0019] The drive shaft 6 is non-rotatably connected to a coupling transmission 12 designed as a simple planetary gear transmission. The plan...
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A method for controlling the operation of a vehicle power train comprising an engine and a power-branched gear with several stepless adjustable speed transforming zones. A target engine rotational speed depending at least upon the position of an accelerator pedal position and a motor vehicle speed is determined in a method for controlling the operation of a motor vehicle drive train having a drive motor and a branched power transmission with several steplessly adjustable transmission ratio regions, between which shifting takes place at a predetermined range shift transmission ratio. A transmission ratio corresponding to the target engine rotational speed and vehicle speed is determined and set, whereby the change with respect to time of the accelerator pedal position and / or the change with respect to time of the target engine rotational speed is used for determining the target engine rotational speed and is filtered when a difference between the actual transmission ratio and a transmission ratio shift range falls below a limit value.
Description
technical field [0001] The invention relates to a method and a device for controlling the operation of a drive train of a motor vehicle having a drive engine and a power branch transmission with a plurality of continuously adjustable transmission ratio ranges, wherein between these transmission ratio ranges there are predetermined ranges Switching is performed when switching gear ratios. Background technique [0002] Transmissions with continuously variable gear ratios are becoming more and more popular in passenger cars not only because of the driving comfort they enable but also because of the possible reduction in energy consumption. Its output power is usually limited by the torque transfer capability of the continuously variable transmission and the expansion range of the gear ratio. The continuously variable transmission (variator) is designed, for example, in the form of a conical-cone-contact transmission, which has two conical-disc pairs on which a contact device, ...
Claims
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IPC IPC(8): B60W10/04B60W10/08B60W10/10F02D9/02F02D29/00F02D41/04F02D45/00F16H9/00F16H37/08F16H59/18F16H59/42F16H61/02F16H61/662F16H61/664
CPCF16H61/66259F16H59/42F16H59/18F16H37/0846F16H2037/0873Y10S477/905A47L13/254
Inventor 梅尔廷·福内姆米夏埃尔·罗伊舍尔克里斯蒂安·劳因格弗伦茨·比策
Owner SCHAEFFLER TECH AG & CO KG