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US 8,068,968 B2Granted
Vehicle travel control system
AssigneeDenso Corporation
InventorToshiyuki Kondoh
Life of this patent
Estimating the term…
Abstract
A vehicle travel control system includes a cruise control ECU, an engine control ECU and a brake control ECU. The cruise control ECU checks whether a driver's actual concentration degree is insufficient relative to a required concentration degree in terms of safety in surrounding environments of the subject vehicle. When such possibility arises, even during the cruise control, the speed of the subject vehicle is controlled to match a control vehicle speed lower than a set vehicle speed or a control distance to a preceding vehicle.
Claims22
A vehicle control system comprising:
- means for automatically driving a subject vehicle at a fixed speed without a driver's cruise operation for adjusting a cruise speed of the subject vehicle;
- means for detecting a driver's actual concentration degree based on a state of the driver;
- means for acquiring a required concentration degree required to the driver for safely cruising the subject vehicle based on information related to surrounding environments of the subject vehicle;
- and
- means for changing a control content of the driving means based on a relation between the actual concentration degree detected by the detecting means and the required concentration degree acquired by the acquiring means,
- wherein the required concentration degree acquired by the acquiring means becomes small as the cruise speed of the subject vehicle becomes low, and
- wherein, when the required concentration degree is larger than the actual concentration, the changing means changes the control content of the driving means to decrease a speed, at which the driving means drives the subject vehicle, until the required concentration degree becomes smaller than the actual concentration degree by a specific value.
4 more elements
A vehicle control system comprising:
- means for automatically driving a subject vehicle to follow a preceding vehicle with a specific vehicular distance corresponding to the speed of the subject vehicle without a driver's cruise operation for adjusting a cruise speed of the subject vehicle;
- means for detecting a driver's actual concentration degree based on a state of the driver;
- means for acquiring a required concentration degree required to the driver for safely cruising the subject vehicle based on information related to surrounding environments of the subject vehicle;
- and
- means for changing a control content of the driving means based on a relation between the actual concentration degree detected by the detecting means and the required concentration degree acquired by the acquiring means,
- wherein the required concentration degree acquired by the acquisition means becomes smaller as the vehicular distance from the preceding vehicle becomes longer, and
- wherein, when the required concentration degree is larger than the actual concentration degree, the driving means changes the control content of the driving means to lengthen a vehicular distance controlled by the driving means until the required concentration degree becomes smaller than the actual concentration degree by a specific value.
4 more elements
Dependencies are inferred from the claim text.