System for preventing carrier from turning sideways

• US 4,480,714 A
• Filed: 06/08/1982
• Issued: 11/06/1984
• Est. Priority Date: 03/05/1982
• Status: Expired due to Fees

• Current Assignee: Toyo Umpanki Co. Ltd.
• Original Assignee: Toyo Umpanki Co. Ltd.
• Inventors: Sugata, Takashi, Yabuta, Takenobu
• Primary Examiner(s): Bertsch, Richard A.
• Application Number:
  US06/386,321
• Time in Patent Office: 882 Days
• Field of Search: 180/285, 180/290, 414/673, 414/674, 414/719, 414/21, 280/755, 280/757, 340/52 R, 340/62, 340/71
• US Class Current: 180/290
• CPC Class Codes: B60G 17/0195 characterised by the regulation being combined with other vehicle control systems conjoint control of vehicle sub-units including control of suspension systems B60W10/22
• CPC Class Codes: B60G 2400/104 lateral or transversal with regard to vehicle
• CPC Class Codes: B60G 2400/204 Vehicle speed
• CPC Class Codes: B60G 2400/206 Body oscillation speed; Body vibration frequency
• CPC Class Codes: B60G 2400/40 Steering conditions
• CPC Class Codes: B60G 2400/60 Load
• CPC Class Codes: B60G 2400/61 Load distribution
• CPC Class Codes: B60G 2400/63 Location of the center of gravity
• CPC Class Codes: B60G 2400/91 Frequency
• CPC Class Codes: B60G 2600/04 Means for informing, instructing or displaying
• CPC Class Codes: B60G 2600/044 Alarm means
• CPC Class Codes: B60G 2800/012 Rolling condition
• CPC Class Codes: B60G 2800/24 Steering, cornering
• CPC Class Codes: B60K 28/00 Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions for electrically-propelled vehicles B60L3/00; road vehicle drive control systems for purposes not related to the control of a particular sub-unit B60W30/00; drive control systems specially adapted for autonomous road vehicles B60W60/00
• CPC Class Codes: B60T 2230/03 Overturn, rollover
• CPC Class Codes: B60T 7/12 for automatic initiation; for initiation not subject to will of driver or passenger limiting speed of vehicles other than rail vehicles B60K31/00
• CPC Class Codes: B62D 37/06 using gyroscopes

Abstract

A system for preventing a vehicle from turning sideways comprises a unit for measuring the weight of a cargo on the vehicle, a unit for measuring the height of gravitational center of the cargo on the vehicle, a unit for measuring the steering angle of the vehicle, and a unit for measuring the running speed of the vehicle. The static stability of the vehicle is derived from the weight and the height of gravitational center of the vehicle and the measured weight and height of gravitational center of the cargo. The dynamic instability of the vehicle during turning is derived from the measured steering angle and running speed. First and second allowable limits are determined according to the static stability. When the dynamic instability exceeds the first allowable limit, the clutch of the vehicle is disengaged, and when the instability exceeds the second limit, the vehicle is braked. Upon the dynamic instability exceeding each allowable limit, information to that effect is given.

Claims

1. A system for preventing a vehicle from turning sideways comprising:

means for measuring the weight of a cargo on the vehicle,

means for measuring the height of gravitational center of the cargo on the vehicle,

means for measuring the steering angle of the vehicle,

means for measuring the running speed of the vehicle,

means for determining the overall height of gravitational center of the vehicle and the cargo from the weight and the height of gravitational center of the vehicle and the measured weight and height of gravitational center of the cargo and deriving the static stability of the vehicle from the overall height of gravitational center,

means for deriving the dynamic instability of the vehicle during turning from the measured steering angle and running speed,

means for comparing the dynamic instability with the static stability and emitting a control signal when the instability is in excess of an allowable limit dependent on the stability, and

speed control means for the vehicle controllable by the control signal.

2. A system as defined in claim 1 wherein a clutch provided between a running power source for the vehicle and drive wheels is disengaged by the speed control means.

3. A system as defined in claim 1 wherein the vehicle is braked by the speed control means.

4. A system as defined in claim 1 wherein the allowable limit is set in two stages, a clutch on the vehicle is disengaged upon the instability exceeding the first allowable limit, and the vehicle is braked upon the instability exceeding the second allowable limit.

5. A system as defined in claim 1 which further comprises display means for showing a graph representing the relation between the steering angle and the running speed allowable by the static stability.

6. A system as defined in claim 5 wherein a spot representing the measured steering angle and running speed is displayed on the display means.

7. A system for preventing a vehicle from turning sideways comprising:

means for measuring the weight of a cargo on the vehicle,

means for measuring the height of gravitational center of the cargo on the vehicle,

means for measuring the steering angle of the vehicle,

means for measuring the running speed of the vehicle,

means for determining the overall height of gravitational center of the vehicle and the cargo from the weight and the height of gravitational center of the vehicle and the measured weight and height of gravitational center of the cargo and deriving the static stability of the vehicle from the overall height of gravitational center, and

display means for showing a graph representing the relation between the steering angle and the running speed allowable by the static stability and a spot representing the measured steering angle and running speed.