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US 6,725,145 B1Granted
Curve approach control apparatus
AssigneeFuji Jukogyo Kabushiki Kaisha
InventorAkira Takahashi
Life of this patent
Estimating the term…
Abstract
In a curve approach control apparatus that uses road information from the navigation device to perform an alarm control or a deceleration control on a curve in front, when it is decided that the driver is going to travel straight as he or she passes through the curve, the alarm control or the deceleration control is inhibited.
Claims15
A curve approach control apparatus comprising:
- vehicle running condition detecting means for detecting a vehicle running condition as the vehicle approaches a curve on a road where the driver has a choice of going straight or turning into the curve and where a set path for the vehicle is for turning into the curve,
- a controlling unit for controlling said vehicle based on at least said vehicle running condition so as to enable said vehicle to safely pass through a curve in front of said vehicle in the event the driver decides to turn into the curve instead of traveling straight on said road;
- comparing means for comparing an actual measured value of a turning motion parameter of said vehicle and an estimated value of a turning motion parameter estimated from said vehicle speed and a curve's radius of curvature, and
- deciding means for determining a driver's intention based on said comparing means whether the driver intends to travel straight on the road or to turn into the curve in front of said vehicle based on said vehicle running condition, and for determining that the driver intends to travel straight when the actual measured value of a turning motion parameter of said vehicle is less than or equal to the estimated value of the turning motion parameter of the vehicle thereby indicating that a straight travel state is decided by the driver.
- wherein said controlling unit, based on said deciding means determining a straight travel state, inhibits unnecessary execution of alarm or deceleration for controlling said vehicle in order to enable said vehicle to safely travel straight on said road when said deciding means determines that the driver intends to travel straight on said road and not enter the curve and when said controlling unit determines from running conditions of said vehicle that the driver intends to turn into the curve, said controlling unit permits alarm control and deceleration control.
2 more elements
A method for curve approach control for a driver of a vehicle comprising:
- detecting a vehicle running condition on a road approaching an intersection of a curve and a straight road:
- controlling the performing of at least one of an alarm control and a deceleration control for a curve in front of a vehicle;
- and
- deciding a driver's intention whether the driver intends to travel straight on said straight road or to turn into the curve based on said vehicle running condition,
- said deciding a driver's intention to travel straight is carried out by comparing an actual measured value of a turning motion parameter of said vehicle and an estimated value of a turning motion estimated from said vehicle speed and a curve's radius of curvature and determining that the driver intends to travel straight when the actual measured value of a turning motion parameter of said vehicle is less than or equal to the estimated value of the turning motion parameter of the vehicle thereby indicating that a straight travel state is decided by the driver,
- wherein said controlling, based on determining a straight travel state, inhibits an execution of at least one of the alarm control and the deceleration control when it is determined that the driver intends to travel straight.
3 more elements
A curve approach control apparatus mounted on a vehicle, comprising:
- a running condition detecting means for detecting a running condition of said vehicle;
- a controlling unit for performing at least one of an alarm control and a deceleration control for a curve in front of said vehicle based on at least said vehicle running condition so as to enable the vehicle to turn into the curve safely;
- intersection detecting means for detecting an intersection in the road in front of said vehicle;
- deciding means for determining whether a driver intends to travel straight through the intersection or to turn at the intersection by detecting a straight travel state of said vehicle based on said vehicle running condition;
- and for determining that the driver intends to travel straight when a straight travel state of said vehicle is detected,
- said deciding means determines said straight travel state by comparing an actual measured value of a turning motion parameter of said vehicle and an estimated value of a turning motion parameter estimated from said vehicle speed and a curve's radius of curvature and for determining that the driver intends to travel straight when the actual measured value of a turning motion parameter of said vehicle is less than or equal to the estimated value of the turning motion parameter of the vehicle thereby indicating that a straight travel state is decided by the driver,
- wherein said controlling unit, based on said deciding means determining a straight travel state, inhibits the execution of said alarm or deceleration for controlling said vehicle when the driver intends to travel straight through said intersection.
4 more elements
Dependencies are inferred from the claim text.