Acceleration control system
First Claim
1. 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,
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Accused Products
Abstract
An acceleration control system stores a target acceleration calculation equation acquired by transforming an equation that expresses that a product of the differentiation of the square power of the speed and the environmental factor αenv represents a sensed value ε of acceleration. A surrounding environment monitor device detects surrounding bodies present in the forward periphery of the vehicle, and an environmental factor calculation unit calculates the environmental factor αenv by using the detected positions of the surrounding bodies. A target acceleration setting unit successively sets target accelerations aref in compliance with the target acceleration calculation equation by using the environmental factor αenv. The acceleration is executed to match the driver'"'"'s feeling.
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Citations
4 Claims
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1. 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:
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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; andmeans for controlling torque of a prime mover of the vehicle so as to attain the target acceleration, - View Dependent Claims (2, 3, 4)
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Specification