Patent ID: 8229643

Claim:
An acceleration control system for setting a target speed and performing acceleration control of a vehicle based on the target speed and a current speed, the acceleration control system comprising: a surrounding body detection device for detecting positions of surrounding bodies present in a forward periphery of the vehicle on a polar coordinate system with the vehicle as a center and a line in a back-and-forth direction of the vehicle as an initial line; means for calculating, when a value based on visual information on an elapse of time until the surrounding body present in front of the vehicle passes by a side of the vehicle is denoted by τ, an environmental factor α env that is a coefficient of a differentiated term of a square power of a speed based on the position of the surrounding body detected by the surrounding body detection device in a following Equation A; means for storing a target acceleration calculation equation and determining a target acceleration by substituting the environmental factor determined by the calculating means, a preset target acceleration sensed value ε 0 and a current vehicle speed for the target acceleration calculation equation, wherein the target acceleration calculation equation is defined as a following Equation B which expresses a relation between a right side of the Equation A and a sensed value ε of acceleration numerically expressing a driver's acceleration feeling or an equation transformed from the Equation B, the Equation A expressing a relation between the differentiated value divided by the square power of τ and the differentiation of the square power of the speed; and means for controlling torque of a prime mover of the vehicle so as to attain the target acceleration, ⅆ ⅆ t ⁢ 1 τ 2 = cos 2 ⁢ ϕ r 2 ⁢ ( 1 + tan 2 ⁢ ϕ ) 2 · ⅆ v 2 ⅆ t ( Equation ⁢ ⁢ A ) where r is a distance from the vehicle to the surrounding body, φ is an angle of the surrounding body in the polar coordinate system, v is the speed of the surrounding body and t is a time, and α env · ⅆ v 2 ⅆ t = ɛ , ⁢ wherein ⁢ ⁢ α env = cos 2 ⁢ ϕ r 2 ⁢ ( 1 + tan 2 ⁢ ϕ ) 2 . ( Equation ⁢ ⁢ B )