Constant speed traveling apparatus for vehicle with inter-vehicle distance adjustment function
First Claim
1. A constant speed traveling apparatus for a vehicle having an inter-vehicle distance adjustment function, comprising:
- inter-vehicle distance measurement means for measuring a distance from a self vehicle to an object present ahead;
relative speed calculation means for calculating a relative speed between the object and the self vehicle by calculating a change in distance data measured by the inter-vehicle distance measurement means;
vehicle recognition means for recognizing based on a change in the relative speed calculated by the relative speed calculation means that the object ahead is a vehicle;
acceleration/deceleration calculation means for, when the vehicle recognition means recognizes that the object ahead is a vehicle, calculating an acceleration/deceleration of the self vehicle on the basis of a difference between the distance data to the object ahead and a target inter-vehicle distance;
target speed calculation means for calculating a target vehicle speed on the basis of the calculated acceleration/deceleration and a previously calculated target vehicle speed; and
vehicle speed control means for performing acceleration/deceleration control which causes a traveling speed of the self vehicle to approach the target vehicle speed of the current processing on the basis of a difference between the calculated target vehicle speed and the current vehicle speed.
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Accused Products
Abstract
An apparatus includes an inter-vehicle distance sensor for measuring a distance from a self vehicle to a vehicle traveling ahead, and a relative speed is calculated on the basis of the inter-vehicle distance data detected by the inter-vehicle distance sensor. When a variation of the relative speed is small, it is recognized that a vehicle is present ahead of the self vehicle. An acceleration/deceleration is obtained from a stored acceleration/deceleration basic map on the basis of a difference between the inter-vehicle distance and a target inter-vehicle distance, and the relative speed with the vehicle ahead, and an acceleration/deceleration correction coefficient is calculated from a correction map set with adjustment constants in correspondence with the measured inter-vehicle distance. An acceleration/deceleration is calculated by multiplying the acceleration/deceleration with the correction coefficient. A new target vehicle speed is calculated on the basis of the calculated acceleration/deceleration, and a previously set target vehicle speed.
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Citations
19 Claims
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1. A constant speed traveling apparatus for a vehicle having an inter-vehicle distance adjustment function, comprising:
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inter-vehicle distance measurement means for measuring a distance from a self vehicle to an object present ahead; relative speed calculation means for calculating a relative speed between the object and the self vehicle by calculating a change in distance data measured by the inter-vehicle distance measurement means; vehicle recognition means for recognizing based on a change in the relative speed calculated by the relative speed calculation means that the object ahead is a vehicle; acceleration/deceleration calculation means for, when the vehicle recognition means recognizes that the object ahead is a vehicle, calculating an acceleration/deceleration of the self vehicle on the basis of a difference between the distance data to the object ahead and a target inter-vehicle distance; target speed calculation means for calculating a target vehicle speed on the basis of the calculated acceleration/deceleration and a previously calculated target vehicle speed; and vehicle speed control means for performing acceleration/deceleration control which causes a traveling speed of the self vehicle to approach the target vehicle speed of the current processing on the basis of a difference between the calculated target vehicle speed and the current vehicle speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A constant speed traveling apparatus for a vehicle having an inter-vehicle distance adjustment function, comprising:
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means for determining a travelling speed of a self vehicle; means for generating a preset constant travelling speed of the self-vehicle; front-vehicle detection means for detecting a presence/absence of a front vehicle traveling ahead of the self vehicle; inter-vehicle distance determination means for determining a target inter-vehicle distance to be set between the self vehicle and the front vehicle; inter-vehicle distance measurement means for measuring an inter-vehicle distance between the self vehicle and the front vehicle is a state where the front-vehicle detection means detects the presence of the front vehicle; relative speed calculation means for calculating a relative speed of the self vehicle relative to the front vehicle on the basis of variations in the inter-vehicle distance measured by the inter-vehicle distance measurement means; first acceleration calculation means for calculating an acceleration/deceleration required for the inter-vehicle distance to become equal to the target inter-vehicle distance, the acceleration/deceleration being calculated based on the measured inter-vehicle distance and the calculated relative speed when the front-vehicle detection means detects the presence of the front vehicle; second acceleration calculation means for calculating an acceleration/deceleration required for the traveling speed of the self vehicle to become equal to the preset constant traveling speed, in the state where the front-vehicle detection means detects the absence of the front vehicle; target vehicle speed calculation means for calculating a new target vehicle speed on the basis of the acceleration/deceleration calculated by one of the first and second acceleration calculation means and a target vehicle speed previously calculated by the target vehicle speed calculation means; vehicle speed control means for controlling the traveling speed of the self vehicle on the basis of a difference between the previously calculated target vehicle speed and the traveling speed of the self vehicle, such that the traveling speed of the self vehicle is made to approach the new target vehicle speed calculated by the target vehicle speed calculation means; and acceleration changing means for changing the acceleration/deceleration calculated by the first and second acceleration calculation means, on the basis of an operation performed by a driver. - View Dependent Claims (17, 18, 19)
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Specification