A torque control method of a road vehicle
A torque control, road vehicle technology, applied in electrical control, control drive, control devices, etc., can solve problems such as slowing down of the increase in drive train load, deterioration of vehicle dynamic responsiveness, and reduced efficiency.
Inactive Publication Date: 2009-04-01
FAB ITAL MAGNETI MARELLI SPA
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Problems solved by technology
The use of the maximum damping algorithm is effective in that it is able to completely or almost completely eliminate vehicle longitudinal acceleration oscillations, however, the application of the maximum damping algorithm significantly slows down the increase in load on the drive train and thus reduces the efficiency and the driver can feel to vehicle dynamic response deterioration
Method used
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Embodiment Construction
[0020] In FIG. 1 , reference numeral 1 designates an entire vehicle provided with two front wheels (not shown) and two rear drive wheels 2 which receive torque from a drive train 3 .
[0021] The drive train 3 comprises: an internal combustion engine 4 arranged in a front position and provided with an angular velocity ω m a rotating drive shaft 5 ; and a power transmission mechanism 6 that transmits the torque generated by the internal combustion engine 4 to the road surface through the rear drive wheels 2 . The power transmission mechanism 6 includes a mechanical gearbox 7, and the gearbox 7 is provided with an angular velocity ω 1 The first shaft 8 that rotates and is connected to the drive shaft 5 is set at an angular velocity ω 2 A second shaft 9 rotates and is connected to a transmission shaft 10 which transmits motion to the rear drive wheels 2 . A differential 11 is provided at the end of the transmission shaft 10 , and a pair of half shafts 12 extend from the differe...
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A control method of the torque of a road vehicle having a powertrain system 3 provided with an engine 4 and a driveline 6 which transmits the torque generated by the engine to the road surface; the method contemplates the steps of: determining a target torque Te-targ; modeling the powertrain system 3 as a single physical component which presents a characteristic mechanical inertia and a characteristic torsional elasticity; determining a current load torque Tr of the vehicle; determining a target torsion delta targ of the powertrain system according to the target torque Te-targ and the current load torque Tr; determining a current torsion delta of the powertrain system and a current torsion speed delta' of the powertrain system 3; determining a requested torque Te-EC on the basis of the energy balance according to the target torsion delta targ, the current torsion delta, the current torsion speed delta', and the current load torque Tr; and using the requested torque Te-EC on the basis of the energy balance to control the torque generation of the engine.
Description
technical field [0001] The invention relates to a torque control method for road vehicles. Background technique [0002] A road vehicle includes a drive train provided with an engine that produces torque and a drive train that transmits the torque produced by the engine to the road surface; for example, in a front wheel drive vehicle provided with an internal combustion engine, the drive train includes a clutch , a gearbox, a differential, two half shafts, and two wheels, each with a metal rim that supports the rubber tire. [0003] The drive train of a road vehicle has a characteristic mechanical inertia (characteristic mechanical inertia) and a characteristic torsional elasticity (characteristic torsional elasticity), that is, in order to transmit the torque generated by the engine, all components of the drive train must undergo torsional deformation or torsion, the The degree of twisting varies depending on the respective mechanical characteristics. When there is a sudd...
Claims
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Login to View More IPC IPC(8): B60L15/20B60K17/00
CPCF02D2200/1004F02D41/021F02D41/1497Y10T477/638Y10T477/33Y02T10/7258F02D2041/1433F02D2250/28B60W30/20F02D2250/18Y10T477/328Y10T477/6403B60W2050/0041Y02T10/72B60W2050/0031
Inventor 萨维诺·路易吉·卢波加布里埃莱·塞拉菲利波·帕拉
Owner FAB ITAL MAGNETI MARELLI SPA