System and method for controlling vehicle
AssigneesToyota Jidosha Kabushiki Kaisha, Advics Co., Ltd.
InventorsGen Inoue, Yasuhito Ishida
Life of this patent
Estimating the term…
Abstract
A system for controlling a vehicle that controls driving force and braking force such that a vehicle speed is maintained at a target vehicle speed. More specifically, when the vehicle speed exceeds the target vehicle speed, the system for controlling a vehicle maintains the driving force at or above a predetermined value, and applies braking force to the vehicle such that the vehicle speed is maintained at the target vehicle speed. This provides the vehicle with sufficient driving force for uphill driving following the downhill driving, and thus to travel uphill without significant speed loss. In other words, the vehicle ascends the uphill road smoothly at an approximately constant speed.
Claims19
A system for controlling a vehicle comprising:
- a control unit that maintains a driving force applied to the vehicle at or above a predetermined value when a vehicle speed exceeds a target vehicle speed and the control unit applies a braking force to the vehicle, while maintaining the driving force applied to the vehicle, such that the vehicle speed is maintained at the target vehicle speed, wherein
- the predetermined value of the driving force is determined based on a gradient of a slope on which the vehicle travels,
- the predetermined value is set to at least a level such that the vehicle travels along an uphill incline with no brake force applied, and
- the predetermined value is based on a driving force detected during prior uphill driving, and the control unit maintains the detected driving force during downhill driving at least until the vehicle again ascends uphill.
A method for controlling a vehicle comprising:
- maintaining a driving force applied to the vehicle at or above a predetermined value when a vehicle speed exceeds a target vehicle speed;
- and
- applying braking force to the vehicle, while maintaining the driving force applied to the vehicle, such that the vehicle speed is maintained at the target vehicle speed, wherein
- the predetermined value of the driving force is determined based on a gradient of a slope on which the vehicle travels,
- the predetermined value is set to at least a level such that the vehicle travels along an uphill incline with no brake force applied, and
- the predetermined value is based on a driving force detected during prior uphill driving, and the control unit maintains the detected driving force during downhill driving at least until the vehicle again ascends uphill.
A system for controlling a vehicle comprising:
- a control unit that maintains a driving force applied to the vehicle at or above a predetermined value when a vehicle speed exceeds a target vehicle speed and the control unit applies a braking force to the vehicle, while maintaining the driving force applied to the vehicle, such that the vehicle speed is maintained at the target vehicle speed, wherein
- the predetermined value of the driving force is equal to the sum of a first driving force and a second driving force,
- the first driving force is set to at least a level such that the vehicle travels along an uphill incline with no brake force applied,
- the second driving force is determined based on the target vehicle speed, and
- the control unit uses data collected from prior uphill driving to calculate the first driving force and maintains the predetermined value during downhill driving at least until the vehicle again ascends uphill.
Dependencies are inferred from the claim text.