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US 8,942,905 B2Granted
Safeguard system for vehicle
AssigneeDenso Corporation
InventorsMasakazu Doi, Mitsuhiro Tokimasa, Takumi Nagaya
Life of this patent
Estimating the term…
Abstract
A safeguard system for a vehicle is provided which works as an unintended operation control system. The safeguard system works to calculate an accelerator-manipulated variable representing a degree to which an accelerator of the vehicle is manipulated. When it is found that the accelerator-manipulated variable has dropped at a given rate and then risen within a preselected rise time period, the safeguard system determines that such an operation is an unintended action and controls an operation of the vehicle such as acceleration or speed of the vehicle to minimize the probability of encountering a hazard to the vehicle.
Claims12
A safeguard system for a vehicle comprising:
- an accelerator-manipulated variable calculator which calculates an accelerator-manipulated variable representing a degree to which an accelerator of the vehicle is manipulated;
- and
- a hazard-minimizing controller which works to control an operation of the vehicle so as to minimize a probability of encountering a hazard to the vehicle when it is found that the accelerator-manipulated variable, as calculated by the accelerator-manipulated variable calculator, has dropped at a given rate and then risen within a preselected rise time period;
- wherein
- when the accelerator-manipulated variable has dropped by a drop threshold or more within a preselected drop time period and then exceeded a rise threshold within the rise time period, the hazard-minimizing controller works to minimize the probability of encountering the hazard to the vehicle;
- and
- the hazard-minimizing controller decreases the rise threshold with an increase in rate at which the accelerator-manipulated variable has dropped by the drop threshold or more.
4 more elements
A safeguard system for a vehicle comprising:
- an accelerator-manipulated variable calculator which calculates an accelerator-manipulated variable representing a degree to which an accelerator of the vehicle is manipulated;
- and
- a hazard-minimizing controller which works to control an operation of the vehicle so as to minimize a probability of encountering a hazard to the vehicle when it is found that the accelerator-manipulated variable, as calculated by the accelerator-manipulated variable calculator, has dropped at a given rate and then risen within a preselected rise time period;
- wherein
- when the accelerator-manipulated variable has dropped by a drop threshold or more within a preselected drop time period and then exceeded a rise threshold within the rise time period, the hazard-minimizing controller works to minimize the probability of encountering the hazard to the vehicle;
- and
- the hazard-minimizing controller decreases the rise threshold with an increase in value of the accelerator-manipulated variable at a time when the accelerator-manipulated variable starts to drop.
4 more elements
A safeguard system for a vehicle comprising:
- an accelerator-manipulated variable calculator which calculates an accelerator-manipulated variable representing a degree to which an accelerator of the vehicle is manipulated;
- and
- a hazard-minimizing controller which works to control an operation of the vehicle so as to minimize a probability of encountering a hazard to the vehicle when it is found that the accelerator-manipulated variable, as calculated by the accelerator-manipulated variable calculator, has dropped at a given rate and then risen within a preselected rise time period;
- wherein
- when the accelerator-manipulated variable has dropped by a drop threshold or more within a preselected drop time period and then exceeded a rise threshold within the rise time period, the hazard-minimizing controller works to minimize the probability of encountering the hazard to the vehicle;
- and
- the hazard-minimizing controller decreases the rise threshold with a decrease in minimum value of a rate of change in the accelerator-manipulated variable when the accelerator-manipulated variable has dropped.
4 more elements
A safeguard system for a vehicle comprising:
- an accelerator-manipulated variable calculator which calculates an accelerator-manipulated variable representing a degree to which an accelerator of the vehicle is manipulated;
- and
- a hazard-minimizing controller which works to control an operation of the vehicle so as to minimize a probability of encountering a hazard to the vehicle when it is found that the accelerator-manipulated variable, as calculated by the accelerator-manipulated variable calculator, has dropped at a given rate and then risen within a preselected rise time period;
- wherein
- when the accelerator-manipulated variable has dropped by a drop threshold or more within a preselected drop time period and then exceeded a rise threshold within the rise time period, the hazard-minimizing controller works to minimize the probability of encountering the hazard to the vehicle;
- and
- the hazard-minimizing controller decreases the drop threshold with a decrease in value of the accelerator-manipulated variable at a time when the accelerator-manipulated variable starts to drop.
4 more elements
Dependencies are inferred from the claim text.