METHOD AND SYSTEM FOR CONTROLLING A VEHICLE POWERTRAIN
First Claim
1. A powertrain system for a vehicle comprisingan automated master clutch,a stepped gearbox anda control unit adapted to control the master clutch and the stepped gearbox, the control unit programmed to generate a control signal indicating a desired gear selection, the control unit comprising at least two different sets of gear selection control algorithms for generating a gear selection control signal, the control algorithms comprising engine rotational speed limits for when to upshift or downshift and for which gear to select and engage, the different control algorithms programmed to generate different gear selection control signals based on input data, the control unit further connected to a gear selection control algorithm selector which indicates which set of gear selection control algorithm that is to be used by the control unit, the different gear selection control algorithms comprising at least a first gear selection control algorithm intended to be used when driving the vehicle in a normal mode corresponding to the conditions on an ordinary road wherein the gear selection control algorithms comprising at least a second gear selection control algorithm intended to be used when driving the vehicle in a soft surface mode, where the control unit is programmed to register prevailing travel resistance and wheel slip, and where if the travel resistance is higher than a predetermined value and if the wheel slip is higher than another predetermined value the control unit is programmed to control according to the soft surface mode.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and system for controlling a powertrain in a vehicle includes steps including registering a road condition. If the registered road condition corresponds to normal road conditions then a first gear selection control algorithm is used intended for driving the vehicle in a normal mode corresponding to the conditions on an ordinary road. If the registered road condition corresponds to soft surface road conditions then a second gear selection control algorithm is used intended for driving the vehicle in a soft surface mode corresponding to the conditions on an soft surface road. In this way, a vehicle can be adapted to be provided with an AMT to work in a satisfactorily way under an increased diversity of conditions.
30 Citations
20 Claims
-
1. A powertrain system for a vehicle comprising
an automated master clutch, a stepped gearbox and a control unit adapted to control the master clutch and the stepped gearbox, the control unit programmed to generate a control signal indicating a desired gear selection, the control unit comprising at least two different sets of gear selection control algorithms for generating a gear selection control signal, the control algorithms comprising engine rotational speed limits for when to upshift or downshift and for which gear to select and engage, the different control algorithms programmed to generate different gear selection control signals based on input data, the control unit further connected to a gear selection control algorithm selector which indicates which set of gear selection control algorithm that is to be used by the control unit, the different gear selection control algorithms comprising at least a first gear selection control algorithm intended to be used when driving the vehicle in a normal mode corresponding to the conditions on an ordinary road wherein the gear selection control algorithms comprising at least a second gear selection control algorithm intended to be used when driving the vehicle in a soft surface mode, where the control unit is programmed to register prevailing travel resistance and wheel slip, and where if the travel resistance is higher than a predetermined value and if the wheel slip is higher than another predetermined value the control unit is programmed to control according to the soft surface mode.
-
12. A method for controlling a powertrain for a vehicle, where the powertrain comprising control algorithms for generating a gear selection control signal, and where the control algorithm comprising engine rotational speed limits for when to upshift or downshift and for which gear to select and engage, the method comprising:
-
registering a road condition, by registering prevailing travel resistance and wheel slip; if the registered road condition corresponds to normal road conditions then a first gear selection control algorithm is used intended for driving the vehicle in a normal mode corresponding to the conditions on an ordinary road; if the registered road condition corresponds to soft surface road conditions, where the travel resistance is higher than a predetermined value and the wheel slip is higher than another predetermined value, then a second gear selection control algorithm is used intended for driving the vehicle in a soft surface mode corresponding to the conditions on an soft surface road. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
-
Specification