Vehicle tilt control apparatus
AssigneeHitachi, Ltd.
InventorsYutaka Kakehi, Katsuyuki Terada, Kenjiro Kasai, Fumio Iwasaki
Life of this patent
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Abstract
A vehicle tilt control apparatus has an acceleration detector for detecting vibration in horizontal and lateral direction of a car body, a fluidically operating mechanism disposed between the car body and a truck and compensation circuits for compensating a centrifugal force component and a jolting component, respectively, of the output of the acceleration detector. The outputs of the compensation circuits are added and the resulting output is fed back to actuate a servo valve to control the fluidically operating mechanism. In this manner, the riding comfort to the passengers when the vehicle passes through a curved area and for the jolting is improved.
Claims9
A vehicle tilt control apparatus provided between a car body and a truck for tiltably supporting the car body on the truck, comprising:
- a fluidically operating mechanism disposed between said car body and said truck for controlling the degree of tilting of said car body relative to said truck;
- an acceleration detector mounted on said car body for detecting centrifugal and vibration acceleration forces to which said car body is subjected and for producing an output indicative of the level of the forces detected;
- a centrifugal force compensation circuit connected to said acceleration detector and producing a control signal for suppressing centrifugal acceleration forces acting on said car body due to the passage of the car body through a curve, in response to a centrifugal force component of the output of said acceleration detector;
- a jolting compensation circuit connected to said acceleration detector and producing a control signal for suppressing vibration forces acting on the car body due to jolting of the car body, in response to a vibration component of the output of said acceleration detector;
- an adder circuit means, connected to said centrifugal force compensation circuit and said jolting compensation circuit, for adding the outputs of said compensation circuits and producing an output control signal;
- and
- a control valve arranged between said fluidically operating mechanism and a fluid source for controlling the flow of fluid between said fluid source and said fluidically operating mechanism in direct response to the output control signal of said adder circuit.
Dependencies are inferred from the claim text.