Management and control method of the gear change and starting phases of a vehicle fitted with an automated manual transmission and transmission and starting apparatus
A transmission, vehicle technology, used in transmission control, mechanical equipment, elements with teeth, etc.
Active Publication Date: 2016-08-10
FAB ITAL MAGNETI MARELLI SPA
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Problems solved by technology
[0020] In particular, it is considered that there is a need in the prior art to solve the problems regarding deceleration perception and synchronization reliability / duration of AMT type transmissions when changing gears, so as not to give up this type of transmission at low fuel consumption, low Advantages in terms of emissions and low cost
Method used
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[0026] With reference to the preceding figures, the reference numeral 4 generally indicates, for example, the figure 1 A schematic overall view of a transmission arrangement of a vehicle according to the invention is shown in .
[0027] Specifically, the transmission device 4 suitable for a vehicle includes an endothermic engine 8 equipped with an engine control unit 12, and a manual or automated manual transmission 16, preferably the manual or automated manual transmission is equipped with a transmission control unit 20 in turn .
[0028] For the purposes of the present invention, the specific type of endothermic engine or the specific type of automated manual transmission is not important, and "automatic transmission" is understood to be a transmission type suitable for use by motor vehicles in which the manual drive is replaced by an automatic drive, such as Hydraulic, electric or electromechanical actuators, with particular reference to the engagement / disengagement operat...
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A management and control method of the gear change and starting phases of a vehicle fitted with a manual or automated manual transmission, comprising the steps of: providing a vehicle having an endothermic engine with relative crankshaft, and an automated manual transmission having a clutch, a primary shaft operatively connected to the clutch, and a secondary shaft operatively connected to the drive wheels of the vehicle, wherein the primary and secondary shafts are provided with gears meshing with each other in a plurality of gears, each having its transmission ratio, the transmission ratio being equal to the ratio between the rotation speed of the primary shaft and the rotation speed of the secondary shaft. Advantageously, the method also comprises the steps of:providing an electric machine operatively connected to the primary shaft by transmission means, said electric machine being mechanically separate from the engine, performing the gear change operation according to the steps of: -placing the automated manual transmission in neutral, in which the primary shaft is mechanically disengaged from the secondary shaft,providing for the actuation of the electric machine with the clutch engaged and the automated manual transmission in the neutral position, in order to adapt the rotation speed of the primary shaft and of the crankshaft connected thereto by the clutch, to the rotation speed of the secondary shaft depending on the gear ratio of the next gear to engage, -engaging the next gear, keeping the clutch closed.
Description
technical field [0001] The invention relates to a method for managing and controlling the shifting and starting phases of a vehicle equipped with an automated manual transmission and a corresponding transmission device suitable for a vehicle equipped with an automated manual transmission. Background technique [0002] As is known, hybrid vehicles are constructed in a wide variety and differ mainly with respect to the position of the motors of the drive train. [0003] The hybridization of vehicles can be achieved by different types of transmissions, such as AT (manual transmission), DCT (dual clutch transmission, dual clutch transmission), CVT (continuous variable transmission, continuously variable transmission), or especially AMT (automated manual transmission, automated manual transmission). [0004] AMT is a type of transmission that ensures the best results in terms of CO2 cycle reduction and moreover it allows retrofitting a vehicle to an HEV without redesigning the t...
Claims
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IPC IPC(8): B60W10/06B60W10/11B60W30/18B60W30/19F16H61/32
CPCB60W10/06B60W10/11B60W30/18018B60W30/19B60W2710/0666B60W2710/1005F16H61/32F16H61/0403F16H2061/0422
Inventor I·登蒂奇F·钱波利尼
Owner FAB ITAL MAGNETI MARELLI SPA