Loading patent…
AssigneeCase Corporation
InventorsWilliam L. Schubert, Geoffrey W. Schmitz
Estimating the term…
An active suspension system for a work vehicle includes an active vibration isolator mounted between the chassis and the cab which controls movement of the cab relative to the chassis in response to a control signal depending on a detected condition (e.g., bumpiness) of a surface ahead of the vehicle. The method of controlling the system includes detecting the bumpiness of the surface on which the vehicle travels, adjusting a performance parameter in response to the detected bumpiness, generating the control signal in response to the detected bumpiness, and applying the control signal to the isolator. Apparatus for such an active suspension system is also disclosed. Bumpiness can be estimated or monitored using vehicle speed, past performance, geo-referenced maps and forward-looking sensors. The adjustable performance parameters include gain and frequency response. The system allows an operator to manually adjust the gain and, thus, the frequency response.
In an off-road work vehicle including a chassis, a propulsion system coupled to the chassis to propel the work vehicle along a surface in a forward direction, an operator's cab supported by the chassis, and an active suspension system including at least one active vibration isolator coupled between the chassis and the cab, each active vibration isolator including a hydraulic actuator disposed to move the cab relative to the chassis based upon fluid selectively applied to the actuator by a valve assembly in response to a control signal, a method of controlling the active suspension system comprising the steps of:
In a work vehicle including a chassis, a propulsion system coupled to the chassis to propel the work vehicle along a surface in a forward direction, an operator's cab supported by the chassis, and an active suspension system including at least one active vibration isolator coupled between the chassis and the cab to control movement of the cab relative to the chassis in response to a control signal, a method of controlling the active suspension system comprising the steps of:
In a work vehicle including a chassis, a propulsion system coupled to the chassis to propel the work vehicle along a surface in a forward direction, an operator's cab supported by the chassis, and an active suspension system including at least one active vibration isolator coupled between the chassis and the cab to control movement of the cab relative to the chassis in response to a control signal, a method of controlling the active suspension system comprising the steps of:
In a work vehicle including a chassis, a propulsion system coupled to the chassis to propel the work vehicle along a surface in a forward direction, an operator's cab supported by the chassis, and an active suspension system including at least one active vibration isolator coupled between the chassis and the cab to control movement of the cab relative to the chassis in response to a control signal, a method of controlling the active suspension system comprising the steps of:
In an off-road work vehicle including a chassis, a propulsion system coupled to the chassis to propel the work vehicle along a surface in a forward direction, an operator's cab supported by the chassis, and an active suspension system including at least one active vibration isolator coupled between the chassis and the cab, each active vibration isolator including a hydraulic actuator disposed to move the cab relative to the chassis based upon fluid selectively applied to the actuator by a valve assembly in response to a control signal, a method of controlling the active suspension system comprising the steps of:
In an off-road work vehicle including a chassis, a propulsion system coupled to the chassis to propel the work vehicle along a surface in a forward direction, an operator's cab supported by the chassis, and a suspension system including at least one active vibration isolator coupled between the chassis and the cab, each active vibration isolator including a hydraulic actuator disposed to move the cab relative to the chassis based upon fluid selectively applied to the actuator by a valve assembly in response to a control signal, an apparatus for controlling the active suspension system comprising:
In a work vehicle including a chassis, a propulsion system coupled to the chassis to propel the work vehicle along a surface in a forward direction, an operator's cab supported by the chassis, and a suspension system including at least one active vibration isolator coupled between the chassis in response cab and configured to control movement of the cab relative to the chassis in response to a control signal, an apparatus for controlling the active suspension system comprising:
In a work vehicle including a chassis, a propulsion system coupled to the chassis to propel the work vehicle along a surface in a forward direction, an operator's cab supported by the chassis, and a suspension system including at least one active vibration isolator coupled between the chassis and the cab and configured to control movement of the cab relative to the chassis in response to a control signal, an apparatus for controlling the active suspension system comprising:
In a work vehicle including a chassis, a propulsion system coupled to the chassis to propel the work vehicle along a surface in a forward direction, an operator's cab supported by the chassis, and an active suspension system including at least one active vibration isolator coupled between the chassis and the cab to control movement of the cab relative to the chassis in response to a control signal, a method of controlling the active suspension system comprising the steps of:
Dependencies are inferred from the claim text.