Constant speed control device for vehicle
AssigneesMitsubishi Denki Kabushiki Kaisha, Mazda Motor Corporation
InventorsYasuo Naitou, Akihiko Mori, Mamoru Hayama
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Abstract
A constant speed running control device for automatically holding a vehicle speed constant makes a response of an aimed speed setting signal delayed to the order of that of a vehicle speed meter indication by making a smoothening characteristics of the aimed speed setting signal different from that of a running speed signal so that the running speed is made substantially coincident with an aimed speed desired by a vehicle operator.
Claims9
A constant running speed control device for a vehicle having a speed meter, comprising:
- running speed detecting means (3) for detecting a running speed of the vehicle;
- first smoothing means (10), coupled to receive the output of said detecting means, for reducing a noise component of a running speed signal obtained by said running speed detecting means;
- instruction information detecting means (12) for detecting instruction information inputted by an operator of the vehicle, the inputted instruction information representing a desired constant running speed;
- second smoothing means (13) for receiving the output of said running speed detecting means, said second smoothing means having smoothing characteristics substantially similar to response characteristics of the speed meter for smoothing said running speed output;
- an aimed speed signal generator means (14) for generating an aimed speed signal Vr based on said smoothed running speed output from said second smoothing means and on said instruction information;
- speed deviation operating means (15) for obtaining a speed deviation based on said aimed speed signal and said smoothed running speed signal (Vs) from said first smoothing means;
- control amount operating means (16) for outputting a control signal based on said speed deviation signal;
- and
- driving force controlling means (7, 9) for controlling a driving force of the vehicle based on the control signal outputted by said control amount operating means.
A constant running speed control system for a vehicle, the vehicle having a speed meter for displaying a running speed of the vehicle, the device comprising:
- running speed detecting means (3) for detecting the running speed of the vehicle;
- smoothing means (13) connected to receive the output of said running speed detecting means for smoothing said vehicle running speed, said smoothing means having smoothing characteristics which are substantially similar to response characteristics of the speed meter;
- instruction information detecting means (12) for detecting instruction information inputted by an operator of the vehicle, the instruction information representing a desired constant vehicle running speed;
- an aimed speed signal generating means (14), connected to receive the output of said instruction information detecting means and the smoothed running speed from said smoothing means, for generating an aimed running speed (Vr) representing the desired constant vehicle running speed;
- speed deviation operating means (15), coupled to said running speed detecting means and to said aimed speed signal generating means, for outputting a speed deviation signal (.epsilon.) representing a difference between the detected vehicle running speed (V) and the aimed running speed;
- control amount operating means (16) for generating a control signal based on the speed deviation signal;
- and
- driving force controlling means (7, 9) for controlling a driving force of the vehicle based on said control signal so that the vehicle running speed becomes substantially equal to the aimed running speed.
Dependencies are inferred from the claim text.