Method and arrangement for controlling a motor vehicle

Claim 1

A method of controlling a motor vehicle which has a drive unit for generating a torque to propel the vehicle and a motor control system defining a first control system for controlling the torque of the drive unit, the drive unit having specific performance characteristics, the motor vehicle having a second control system for operating on said torque in at least one operating state of said drive unit, the method comprising the steps of: providing a software interface through which torque signal values are transmitted between said first and second control systems; generating a desired value (mokupdes) of said torque in said second control system and transmitting said desired value (mokupdes) to said first control system via said software interface; adapting said second control system to permit said second control system to operate without any data indicative of said specific performance characteristics of said drive unit; programming said first control system to perform the following additional method steps: reading in said desired value (mokupdes) of the torque of said drive unit with said desired value (mokupdes) defining a value of said torque of said drive unit; detecting a value of at least one operating variable (tLHFM, n) of said drive unit; forming an electrical output signal (DKdes, X, dzw) based on said desired value (mokupdes) of said torque; computing an actual torque (mokupfu, mokupact) of said drive unit on the basis of said value of said at least one operating variable (tLHFM, n) of said drive unit; outputting said at least one electrical output signal to an actuator for affecting a variable of said drive unit so that the value of the actual torque of said drive unit approaches said desired value (mokupdes) of said torque; and, transmitting the actual torque (mokupfu, mokupact) of said torque via said software interface to said second control system where said actual torque (mokuptu, mokupact) is processed to generate said desired value (mokupdes) for said first control system.

Claim 2

A method of controlling a motor vehicle which has a drive unit for generating a torque to propel the vehicle and a motor control system defining a first control system for controlling the torque of the drive unit, the drive unit having specific performance characteristics, the motor vehicle having a second control system for operating on said torque in at least one operating state of said drive unit, the method comprising the steps of: providing a software interface through which torque signal values are transmitted between said first and second control systems; generating a desired value (mokupdes) of said torque in said second control system and transmitting said desired value (mokupdes) to said first control system via said software interface; adapting said second control system to permit said second control system to operate without any data indicative of said specific performance characteristics of said drive unit; programming said first control system to perform the following additional method steps: reading in said desired value (mokupdes) of the torque of said drive unit with said desired value (mokupdes) defining a value of said torque of said drive unit; detecting a value of at least one operating variable (tLHFM, n) of said drive unit; forming an electrical output signal (DKdes, X, dzw) based on said desired value (mokupdes) of said torque; computing an actual torque (mokupfu, mokupact) of said drive unit on the basis of said value of said at least one operating variable (tLHFM, n) of said drive unit; outputting said at least one electrical output signal to an actuator for affecting a variable of said drive unit so that the value of the actual torque of said drive unit approaches said desired value (mokupdes) of said torque; and, transmitting the actual torque (mokupfu, mokupact) of said torque via said software interface to said second control system where said actual torque (mokuptu, mokupact) is processed to generate said desired value (mokupdes) for said first control system.

Claim 12

A method of controlling a motor vehicle which has a drive unit for generating a torque to propel the vehicle and a motor control system defining a first control system for controlling the torque of the drive unit, the motor vehicle having a second control system for operating on said torque in at least one operating state of said drive unit, the method comprising the steps of: reading in a desired value (mokupdes) of the torque of said drive unit with said desired value (mokupdes) defining a value of said torque of said drive unit; detecting a value of at least one operating variable (tLHFM, n) of said drive unit; forming an electrical output signal (DKdes, X, dzw) based on said desired value (mokupdes) of said torque; computing an actual torque (mokupfu, mokupact) of said drive unit on the basis of said value of said at least one operating variable of said drive unit; outputting said at least one electrical output signal to an actuator for affecting a variable of said drive unit so that the value of the actual torque of said drive unit approaches said desired value (mokupdes) of said torque; and, providing an interface between said first and second control systems; transmitting the actual value (mokupfu, mokupact) of said torque to said second control system via said interface; converting said read-in desired value (mokupdes) of said torque into at least one of the following variables: a number (X) of cylinders to which fuel metering is interrupted; a correction (dzw) of the ignition angle setting; and, a control variable (DKdes) for adjusting an actuator controlling the air supplied to said drive unit; detecting two operating variables of said drive unit with one of said operating variables being the air mass (tLHFM) supplied to the drive unit and the other operating variable being the engine rpm (n); and, computing said actual torque (mokupfu, mokupact) of said drive unit on the basis of the detected air mass (tLHFM) and the detected engine rpm (n) while considering at least one of said ignition angle setting and said number (X) of said cylinders to which fuel metering is interrupted.

Claim 13

A method of controlling a motor vehicle which has a drive unit for generating a torque to propel the vehicle and a motor control system defining a first control system for controlling the torque of the drive unit, the motor vehicle having a second control system for operating on said torque in at least one operating state of said drive unit, the method comprising the steps of: reading in a desired value (mokupdes) of the torque of said drive unit with said desired value (mokupdes) defining a value of said torque of said drive unit; detecting a value of at least one operating variable (tLHFM, n) of said drive unit; forming an electrical output signal (DKdes, X, dzw) based on said desired value (mokupdes) of said torque; computing an actual torque (mokupfu, mokupact) of said drive unit on the basis of said value of said at least one operating variable of said drive unit; outputting said at least one electrical output signal to an actuator for affecting a variable of said drive unit so that the value of the actual torque of said drive unit approaches said desired value (mokupdes) of said torque; and, providing an interface between said first and second control systems; transmitting the actual value (mokupfu, mokupact) of said torque to said second control system via said interface; converting said read-in desired value (mokupdes) of said torque into at least one of the following variables: a number (X) of cylinders to which fuel metering is interrupted; a correction (dzw) of the ignition angle setting; and, a control variable (DKdes) for adjusting an actuator controlling the air supplied to said drive unit; detecting two operating variables of said drive unit with one of said operating variables being the air mass (tLHFM) supplied to the drive unit and the other operating variable being the engine rpm (n); and, computing said actual torque (mokupfu, mokupact) of said drive unit on the basis of the detected air mass (tLHFM) and the detected engine rpm (n) while considering at least one of said ignition angle setting and said number (X) of said cylinders to which fuel metering is interrupted.

Claim 14

A method of controlling a motor vehicle which has a drive unit for generating a torque to propel the vehicle and a motor control system defining a first control system for controlling the torque of the drive unit, the motor vehicle having a second control system for operating on said torque in at least one operating state of said drive unit, the method comprising the steps of: reading in a desired value (mokupdes) of the torque of said drive unit with said desired value (mokupdes) defining a value of said torque of said drive unit; detecting a value of at least one operating variable (tLHFM, n) of said drive unit; forming an electrical output signal (DKdes, X, dzw) based on said desired value (mokupdes) of said torque; computing an actual torque (mokupfu, mokupact) of said drive unit on the basis of said value of said at least one operating variable of said drive unit; outputting said at least one electrical output signal to an actuator for affecting a variable of said drive unit so that the value of the actual torque of said drive unit approaches said desired value (mokupdes) of said torque; and, providing an interface between said first and second control systems; transmitting the actual value (mokupfu, mokupact) of said torque to said second control system via said interface; converting said read-in desired value (mokupdes) of said torque into at least one of the following variables: a number (X) of cylinders to which fuel metering is interrupted; a correction (dzw) of the ignition angle setting; and, a control variable (DKdes) for adjusting an actuator controlling the air supplied to said drive unit; wherein, to compute said correction (dzw) of said ignition angle setting, the method comprises the further step of forming a second actual torque (movopt, movfu) by adjusting the air supplied to said drive unit; and, compensating the deviation of said second actual torque (movopt, movfu) from said desired torque (mokupdes) by said ignition angle setting correction (dzw).

Claim 15

A method of controlling a motor vehicle which has a drive unit for generating a torque to propel the vehicle and a motor control system defining a first control system for controlling the torque of the drive unit, the motor vehicle having a second control system for operating on said torque in at least one operating state of said drive unit, the method comprising the steps of: reading in a desired value (mokupdes) of the torque of said drive unit with said desired value (mokupdes) defining a value of said torque of said drive unit; detecting a value of at least one operating variable (tLHFM, n) of said drive unit; forming an electrical output signal (DKdes, X, dzw) based on said desired value (mokupdes) of said torque; computing an actual torque (mokupfu, mokupact) of said drive unit on the basis of said value of said at least one operating variable of said drive unit; outputting said at least one electrical output signal to an actuator for affecting a variable of said drive unit so that the value of the actual torque of said drive unit approaches said desired value (mokupdes) of said torque; and, providing an interface between said first and second control systems; transmitting the actual value (mokupfu, mokupact) of said torque to said second control system via said interface; converting said read-in desired value (mokupdes) of said torque into at least one of the following variables: a number (X) of cylinders to which fuel metering is interrupted; a correction (dzw) of the ignition angle setting; and, a control variable (DKdes) for adjusting an actuator controlling the air supplied to said drive unit; wherein, to compute said correction (dzw) of said ignition angle setting, the method comprises the further step of forming a second actual torque (movopt, movfu) by adjusting the air supplied to said drive unit; and, compensating the deviation of said second actual torque (movopt, movfu) from said desired torque (mokupdes) by said ignition angle setting correction (dzw).

Claim 16

A method of controlling a motor vehicle which has a drive unit for generating a torque to propel the vehicle and a motor control system defining a first control system for controlling the torque of the drive unit, the motor vehicle having a second control system for operating on said torque in at least one operating state of said drive unit, the method comprising the steps of: reading in a desired value (mokupdes) of the torque of said drive unit with said desired value (mokupdes) defining a value of said torque of said drive unit; detecting a value of at least one operating variable (tLHFM, n) of said drive unit; forming an electrical output signal (DKdes, X, dzw) based on said desired value (mokupdes) of said torque; computing an actual torque (mokupfu, mokupact) of said drive unit on the basis of said value of said at least one operating variable of said drive unit; outputting said at least one electrical output signal to an actuator for affecting a variable of said drive unit so that the value of the actual torque of said drive unit approaches said desired value (mokupdes) of said torque; and, providing an interface between said first and second control systems; transmitting the actual value (mokupfu, mokupact) of said torque to said second control system via said interface; converting said read-in desired value (mokupdes) of said torque into at least one of the following variables: a number (X) of cylinders to which fuel metering is interrupted; a correction (dzw) of the ignition angle setting; and, a control variable (DKdes) for adjusting an actuator controlling the air supplied to said drive unit; wherein, to determine said number (X) of cylinders to which fuel is to be interrupted, the method comprises the further steps of forming a second actual torque (movopt, movfu) by adjusting the air supplied to said drive unit; and, compensating the deviation of said actual torque (movopt, movfu) from said desired torque (mokupdes) by said number (X) of said cylinders to which fuel is to be interrupted.

Claim 17

A method of controlling a motor vehicle which has a drive unit for generating a torque to propel the vehicle and a motor control system defining a first control system for controlling the torque of the drive unit, the motor vehicle having a second control system for operating on said torque in at least one operating state of said drive unit, the method comprising the steps of: reading in a desired value (mokupdes) of the torque of said drive unit with said desired value (mokupdes) defining a value of said torque of said drive unit; detecting a value of at least one operating variable (tLHFM, n) of said drive unit; forming an electrical output signal (DKdes, X, dzw) based on said desired value (mokupdes) of said torque; computing an actual torque (mokupfu, mokupact) of said drive unit on the basis of said value of said at least one operating variable of said drive unit; outputting said at least one electrical output signal to an actuator for affecting a variable of said drive unit so that the value of the actual torque of said drive unit approaches said desired value (mokupdes) of said torque; and, providing an interface between said first and second control systems; transmitting the actual value (mokupfu, mokupact) of said torque to said second control system via said interface; converting said read-in desired value (mokupdes) of said torque into at least one of the following variables: a number (X) of cylinders to which fuel metering is interrupted; a correction (dzw) of the ignition angle setting; and, a control variable (DKdes) for adjusting an actuator controlling the air supplied to said drive unit; wherein, to determine said number (X) of cylinders to which fuel is to be interrupted, the method comprises the further steps of forming a second actual torque (movopt, movfu) by adjusting the air supplied to said drive unit; and, compensating the deviation of said actual torque (movopt, movfu) from said desired torque (mokupdes) by said number (X) of said cylinders to which fuel is to be interrupted.