Roll stabilization system

• US 3,977,694 A
• Filed: 06/20/1974
• Issued: 08/31/1976
• Est. Priority Date: 07/17/1973
• Status: Expired due to Term

• Current Assignee: Allmanna Svenska Elektriska Aktiebolaget
• Original Assignee: Allmanna Svenska Elektriska Aktiebolaget
• Inventors: Nordstrom, Karl Tage
• Primary Examiner(s): Spar, Robert J.
• Assistant Examiner(s): Beltran, Howard
• Application Number:
  US05/481,380
• Time in Patent Office: 803 Days
• Field of Search: 105/164, 105/199 A, 105/199 R, 105/201, 105/210, 105/171, 280/112 A
• US Class Current: 280/5.509
• CPC Class Codes: B60G 17/0162 mainly during a motion involving steering operation, e.g. cornering, overtaking B60G17/0164 takes precedence
• CPC Class Codes: B60G 17/033 characterised by regulating means acting on more than one spring
• CPC Class Codes: B60G 21/073 between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
• CPC Class Codes: B60G 21/08 characterised by use of gyroscopes gyroscopes for stabilising vehicle bodies without controlling suspension arrangements B62D37/06
• CPC Class Codes: B60G 2202/413 Hydraulic actuator
• CPC Class Codes: B60G 2204/82 left and right unit on same axle
• CPC Class Codes: B60G 2204/8304 using a fluid
• CPC Class Codes: B60G 2600/04 Means for informing, instructing or displaying
• CPC Class Codes: B60G 2800/012 Rolling condition
• CPC Class Codes: B60G 2800/24 Steering, cornering
• CPC Class Codes: B60G 2800/70 Estimating or calculating vehicle parameters or state variables
• CPC Class Codes: B60G 2800/9124 Roll-over protection systems, e.g. for warning or control
• CPC Class Codes: B61F 5/22 Guiding of the vehicle underframes with respect to the bogies
• CPC Class Codes: B62D 37/00 Stabilising vehicle bodies without controlling suspension arrangements

Abstract

A vehicle has a wheeled chassis and a body movably mounted thereon, the body being able to carry goods and/or passengers. An accelerometer detects forces acting on the vehicle as the vehicle passes through a curve and is arranged to activate a vehicle body tilting and lateral displacing system. A first power mechanism tilts the body relative to the chassis toward the center of the curve. A second power mechanism laterally shifts the body relative to the chasis by applying lateral forces that are independent of the tilting forces. The lateral movement can be either toward or away from the center of the curve.

Claims

1. In a vehicle comprising a wheeled chassis arranged to ride upon a support surface, a body movably mounted on the chassis and being operable to carry passengers and goods, said vehicle body being normally situated in a neutral lateral orientation relative to said chassis during generally straight ahead travel of said vehicle, force detecting means for detecting and being activated by outwardly directed forces acting on the vehicle as the vehicle passes through a curve, and means operably connected to said force detecting means for displacing said body relative to said chassis in response to said vehicle passing through said curve, the improvement wherein said body displacing means comprises:

first power actuable means operably connected between said body and said chassis for tilting said body relative to said chassis such that the outer portion of said body facing away from the center of the curve is elevated relative to the inner portion of said body facing toward the center of the curve;

second power actuable means operably connected between said body and said chassis for laterally displacing said body relative to said chassis in a direction away from the center of the curve and away from said neutral lateral orientation;

power supply means for supplying power to actuate said first and second power actuable means comprising;

power source means;

first power transmitting means operably connecting said power source means to said first power actuable means to transmit power therebetween;

second power transmitting means operably connecting said power source means with said second power actuable means such that power is supplied to said second power actuable means separately from power supplied to said first power actuable means; and

means interconnecting said power supply means and said force detecting means for actuating said first and second power actuable means in response to said vehicle passing through a curve.

2. A system according to claim 1 wherein said first power actuable means comprises at least a pair of fluid cylinders located on opposite sides of the longitudinal axis of said vehicle, said second power actuable means comprising at least one fluid cylinder which has a pivotal connection to said chassis for rotation about an axis disposed parallel to the longitudinal axis of said vehicle;

said pivotal connection defining a pivot axis about which said body tilts relative to said chassis, so that said pivot connection remains fixed during tilting and lateral movement of the vehicle body.

3. In a vehicle comprising a wheeled chassis arranged to ride upon a support surface, a body movable mounted on the chassis and being operable to carry passengers and goods, said vehicle body being normally situated in a neutral lateral orientation relative to said chassis during generally straight ahead travel of said vehicle, force detecting means for detecting and being activated by outwardly directed forces acting on the vehicle as the vehicle passes through a curve, and means operably connected to said force detecting means for displacing said body relative to said chassis in response to said vehicle passing through said curve, the improvement wherein said body displacing means comprises:

first power actuable means operably connected between said body and said chassis for tilting said body relative to said chassis such that the outer portion of said body facing away from the center of the curve is elevated relative to the inner portion of said body facing toward the center of the curve;

second power actuable means operably connected between said body and said chassis for laterally displacing said body relative to said chassis in a direction toward the center of the curve and away from said neutral lateral orientation;

power supply means for supplying power to actuate said first and second power actuable means comprising;

power source means;

first power transmitting means operably connecting said power source means to said first power actuable means to transmit power therebetween;

second power transmitting means operably connecting said power source means with said second power actuable means such that power is supplied to said second power actuable means separately from power supplied to said first power actuable means; and

means interconnecting said power supply means and said force detecting means for actuating said first and second power actuable means in response to said vehicle passing through a curve.

4. A system according to claim 3 wherein said first power actuable means comprises at least a pair of fluid cylinders located on opposite sides of the longitudinal axis of said vehicle;

said second power actuable means comprising at least one fluid cylinder which has a pivotal connection to said chassis for rotation about an axis disposed parallel to the longitudinal axis of said vehicle;

said pivotal connection defining a pivot axis about which said body tilts relative to said chassis, so that said pivot connection remains fixed during tilting and lateral movement of the vehicle body.

5. A system for reducing the risk of a vehicle overturning and for reducing the outward force on contents inside said vehicle when said vehicle is passing through a curve, said vehicle comprising:

a wheeled chassis arranged to co-act with and move on a supporting surface,

a vehicle body pivotably mounted on said chassis and having a supporting surface for said contents,

a force detecting device on said vehicle for detecting and being activated by outwardly directed forces acting on the vehicle as said vehicle passes through a curve,

said chassis having a transverse beam which is rotatable about a vertical axis;

a pair of first piston-cylinders connected to said force detecting device and rotatably connected between respective ends of said beam and the vehicle body,

said first piston-cylinders being arranged to tilt the vehicle body toward the center of the curve such that the outer portion of the vehicle body is elevated relative to the inner portion thereof; and

a second piston-cylinder connected to said force detecting device and being journaled by longitudinal pivot means on said beam for rotation in a vertical plane,

said second piston-cylinder being provided with two piston rods movable as one unit, said piston rods being directed toward the ends of said beam with their free ends being rotatably connected to said vehicle body, said second piston-cylinder being arranged to laterally displace said vehicle body relative to said chassis and relative to said longitudinal pivot means independently of the tilting forces exerted by said first piston-cylinders,

in response to activation of said force detecting device.

6. Apparatus according to claim 5 wherein said second piston-cylinder is arranged to laterally displace said vehicle body toward the center of said curve.

7. Apparatus according to claim 5 wherein said second piston-cylinder is arranged to laterally displace said vehicle body away from the center of said curve.