Method and system for controlling a vehicle cruise control
First Claim
1. Method for controlling a vehicle cruise control comprising:
- driving the vehicle with the cruise control active and set to maintain a vehicle set target speed;
registering, by a processor, a first vehicle position when driving in an uphill slope of a hill where vehicle retardation has decreased vehicle speed to a first vehicle speed below the vehicle set target speed and where the retardation has decreased to zero or the vehicle has just started to accelerate in order to increase vehicle speed to the vehicle set target speed;
selecting, by a processor, a second position downhill of a crest of the hill and registering, by the processor, a desired vehicle speed in the second position;
based on the desired vehicle speed calculating a vehicle speed needed at the crest with which the vehicle has to pass the crest in order to be able to reach the desired vehicle speed with a minimized or zero fuel consumption while traveling from the crest to the second position; and
controlling vehicle speed during a second, non-zero distance between the first vehicle position and the crest so that the vehicle reaches the needed vehicle speed when passing the crest, and maintaining a vehicle speed below the vehicle set target speed during the second distance.
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Accused Products
Abstract
A method and a vehicle cruise control system performing the steps of driving with the cruise control active and set to maintain a set target speed, registering a first position when driving in an uphill slope of a hill where vehicle retardation has decreased vehicle speed to a first speed below the set target speed and where the retardation has decreased to zero or acceleration has just started in order to increase speed to the set target speed, registering a desired speed in a second position downhill of the crest at a first distance after the crest, based on the desired speed calculating a minimum speed at the crest with which the vehicle has to pass the crest in order to be able to reach the desired speed with zero fuel consumption during the first distance, controlling speed between the first position and the crest so that the vehicle reaches the minimum speed when passing the crest.
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Citations
12 Claims
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1. Method for controlling a vehicle cruise control comprising:
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driving the vehicle with the cruise control active and set to maintain a vehicle set target speed; registering, by a processor, a first vehicle position when driving in an uphill slope of a hill where vehicle retardation has decreased vehicle speed to a first vehicle speed below the vehicle set target speed and where the retardation has decreased to zero or the vehicle has just started to accelerate in order to increase vehicle speed to the vehicle set target speed; selecting, by a processor, a second position downhill of a crest of the hill and registering, by the processor, a desired vehicle speed in the second position; based on the desired vehicle speed calculating a vehicle speed needed at the crest with which the vehicle has to pass the crest in order to be able to reach the desired vehicle speed with a minimized or zero fuel consumption while traveling from the crest to the second position; and controlling vehicle speed during a second, non-zero distance between the first vehicle position and the crest so that the vehicle reaches the needed vehicle speed when passing the crest, and maintaining a vehicle speed below the vehicle set target speed during the second distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A vehicle cruise control system comprising a control unit, driver input interface, vehicle position identifying device, road topography identifying device, wherein the control unit is arranged, when a vehicle comprising the cruise control system is driven with the cruise control system active and set to maintain a vehicle set target speed, to control the vehicle cruise control by a method comprising:
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registering, by a processor, a first vehicle position when driving in an uphill slope of a hill where vehicle retardation has decreased vehicle speed to a first vehicle speed below the vehicle set target speed and where the retardation has decreased to zero or the vehicle has just started to accelerate in order to increase vehicle speed to the vehicle set target speed; selecting, by a processor, a second position downhill of a crest of the hill and registering, by the processor, a desired vehicle speed in the second position; based on the desired vehicle speed calculating a needed vehicle speed at the crest with which the vehicle has to pass the crest in order to be able to reach the desired vehicle speed with a minimized or zero fuel consumption while traveling from the crest to the second position; controlling vehicle speed during a second, non-zero distance between the first vehicle position and the crest so that the vehicle reaches the needed vehicle speed when passing the crest, and maintaining a vehicle speed below the vehicle set target speed during the second distance.
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Specification