초록 ▼

An obstacle existing ahead of a vehicle is recognized to detect information on the obstacle. Information on travelling conditions of the vehicle is detected. The steering performance of the vehicle is changed for controlling behaviors of the vehicle. It is determined whether the vehicle can avoid co

An obstacle existing ahead of a vehicle is recognized to detect information on the obstacle. Information on travelling conditions of the vehicle is detected. The steering performance of the vehicle is changed for controlling behaviors of the vehicle. It is determined whether the vehicle can avoid collision with the obstacle only by a driver's braking operation based on at least the information on the obstacle and the vehicle. The vehicle enters into an evasive driving mode in accordance with a driver's steering operation when it is determined that the vehicle cannot avoid collision with the obstacle only by the driver's braking operation. The steering performance of the vehicle is changed for controlling behaviors of the vehicle. It is determined whether the vehicle has been maneuvered for avoiding collision with the obstacle. The vehicle is released from the evasive driving mode when it is determined that the vehicle has not been maneuvered for avoiding collision with the obstacle even though the vehicle has reached the obstacle in the evasive driving mode.

대표청구항 ▼

An obstacle existing ahead of a vehicle is recognized to detect information on the obstacle. Information on travelling conditions of the vehicle is detected. The steering performance of the vehicle is changed for controlling behaviors of the vehicle. It is determined whether the vehicle can avoid co

An obstacle existing ahead of a vehicle is recognized to detect information on the obstacle. Information on travelling conditions of the vehicle is detected. The steering performance of the vehicle is changed for controlling behaviors of the vehicle. It is determined whether the vehicle can avoid collision with the obstacle only by a driver's braking operation based on at least the information on the obstacle and the vehicle. The vehicle enters into an evasive driving mode in accordance with a driver's steering operation when it is determined that the vehicle cannot avoid collision with the obstacle only by the driver's braking operation. The steering performance of the vehicle is changed for controlling behaviors of the vehicle. It is determined whether the vehicle has been maneuvered for avoiding collision with the obstacle. The vehicle is released from the evasive driving mode when it is determined that the vehicle has not been maneuvered for avoiding collision with the obstacle even though the vehicle has reached the obstacle in the evasive driving mode. icle; determining a driveline surge tolerance based at least in part on one or more of the vehicle operating parameters; and selecting one of the compression ratio operating modes based at least in part on a comparison of the driveline surge to the driveline surge tolerance. 6. The method according to claim 5, wherein said step of determining the driveline surge comprises the steps of: determining a brake engine torque; determining a baseline engine surge based at least in part on the brake engine torque; and determining the driveline surge based at least in part on the baseline engine surge. 7. The method according to claim 6, wherein said baseline engine surge is proportional to the brake engine torque. 8. The method according to claim 6, wherein said step of determining the baseline engine surge comprises the steps of: determining a maximum brake torque (MBT) spark timing for the internal combustion engine; determining a borderline spark timing for the internal combustion engine; computing a difference between the MBT spark timing and the borderline spark timing; and defining a percent multiplier of the brake engine torque as a function of the difference between the MBT spark timing and the borderline spark timing; and using the percent multiplier and the brake engine torque to derive the baseline engine surge. 9. The method according to claim 6, wherein said driveline surge is proportional to the baseline engine surge. 10. The method according to claim 6, wherein said step of determining the driveline surge comprises the steps of: defining a percent multiplier of the baseline engine surge that represent transmissibility of the baseline engine surge; and using the percent multiplier and the baseline engine surge to derive the driveline surge. 11. The method according to claim 10, wherein the percent multiplier is a first multiplier representing a portion of the transmissibility attributable to a transmission gear ratio. 12. The method according to claim 10, wherein the percent multiplier is a second multiplier representing a portion of the transmissibility attributable to a torque converter status of the motor vehicle. 13. The method according to claim 5, wherein the driveline surge tolerance is at least in part a function of vehicle acceleration rate. 14. The method according to claim 5, wherein said selecting step comprises the step of selecting a low compression ratio operating mode for the internal combustion engine if the driveline surge exceeds the driveline surge tolerance. 15. The method according to claim 5, wherein said selecting step comprises the step of selecting a high compression ratio operating mode for the internal combustion engine if the driveline surge is less than or equal to the driveline surge tolerance. 16. The method according to claim 5, further comprising the steps of: determining a difference value between the driveline surge and the driveline surge tolerance; selecting a lower compression ratio operating mode if the difference is greater than a predetermined value, selecting a higher compression ratio operating mode if the difference is less than the predetermined value; and maintaining a current compression ratio operating mode if the difference is equal to the predetermined value. 17. The method according to claim 5, further comprising the step of: adjusting the driveline surge tolerance with a hysteresis value; and selecting one of the compression ratio operating modes based at least in part on a comparison of the driveline surge to the adjusted driveline surge tolerance. 18. The method according to claim 17, further comprising the step of selecting a low compression ratio operating mode for the internal combustion engine if the driveline surge exceeds the adjusted driveline surge tolerance. 19. The method according to claim 17, further comprising the step of selecting a high compression ratio operating mode for the internal combustion engine if the dri veline surge is less than or equal to the adjusted driveline surge tolerance. 20. The method according to claim 17, further comprising the steps of: determining a difference value between the driveline surge and the adjusted driveline surge tolerance; selecting a lower compression ratio operating mode if the difference is greater than a predetermined value, selecting a higher compression ratio operating mode if the difference is less than the predetermined value; and maintaining a current compression ratio operating mode if the difference is equal to the predetermined value. 21. A method of operating a variable compression ratio internal combustion engine coupled to a driveline of a motor vehicle, the internal combustion engine being operable in at least a high compression ratio mode and a low compression ratio mode, the method comprising: determining a brake engine torque; determining a baseline engine surge based at least in part on the brake engine torque; determining a driveline surge based at least in part on the baseline engine surge; determining a driveline surge tolerance based at least in part on one or more operating parameters of the motor vehicle; and scheduling operation of the internal combustion engine in one of the compression ratio operating modes based at least in part of a comparison of the driveline surge to the driveline surge tolerance. 22. The method according to claim 21, wherein said baseline engine surge is proportional to the brake engine torque. 23. The method according to claim 21, wherein said step of determining the baseline engine surge comprises the steps of: determining a maximum brake torque (MBT) spark timing for the internal combustion engine; determining a borderline spark timing for the internal combustion engine; computing a difference between the MBT spark timing and the borderline spark timing; and defining a percent multiplier of the brake engine torque as a function of the difference between the MBT spark timing and the borderline spark timing; and using the percent multiplier and the brake engine torque to derive the baseline engine surge. 24. The method according to claim 21, wherein said driveline surge is proportional to the baseline engine surge. 25. The method according to claim 21, wherein said step of determining the driveline surge comprises the steps of: defining a percent multiplier of the baseline engine surge that represents transmissibility of the baseline engine surge; and using the percent multiplier and the baseline engine surge to derive the driveline surge. 26. The method according to claim 25, wherein the percent multiplier is a first multiplier representing a portion of the transmissibility attributable to a transmission gear ratio. 27. The method according to claim 25, wherein the percent multiplier is a second multiplier representing a portion of the transmissibility attributable to a torque converter status of the motor vehicle. 28. The method according to claim 25, wherein the driveline surge tolerance is a function of vehicle acceleration rate. 29. The method according to claim 21, wherein said scheduling step comprises the step of selecting a low compression ratio operating mode for the internal combustion engine if the driveline surge exceeds the driveline surge tolerance. 30. The method according to claim 21, wherein said scheduling step comprises the step of selecting a high compression ratio operating mode for the internal combustion engine if the driveline surge is less than or equal to the driveline surge tolerance. 31. The method according to claim 21, further comprising the steps of: determining a difference value between the driveline surge and the driveline surge tolerance; selecting a lower compression ratio operating mode if the difference is greater than a predetermined value, selecting a higher compression ratio operating mode if the difference is less than the predetermined value; and maintaining a curren