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| Delay time estimation method and recording medium storing estimation program |
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| Method for analyzing the driving behavior of motor vehicles |
| OF THE PREFERRED EMBODIMENTS The system 1 is installed in the vehicle being tested where it will ... |
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| Vehicular black box monitoring system |
| The present invention provides a vehicular monitoring system in the form of a black box or the like ... |
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| Method and system for condition monitoring of vehicles |
| The present invention, is addressed to a system and a method for an improved vehicle-monitoring ... |
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| Vehicle tracking unit with fault condition diagnosis and related methods |
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| Method for managing construction machine, and arithmetic processing apparatus |
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| Method and apparatus for monitoring work vehicles |
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System for reducing powertrain reaction torque
| Details |
Inventors: Tobler, Bill; Tiller, Michael; Bowles, Paul;
Assignee: Ford Global Technologies, LLC (Dearborn, MI)
Primary Examiner: Beaulieu; Y.
Assistant Examiner:
Attorney, Agent or Firm: Kelley; David B. RandyTung-Tung & Associates
A system is provided for controlling the inertia of a vehicle's powertrain during sudden braking events. Torque generated by rapid deceleration of the vehicle's drive wheels during braking is prevented from being transmitted through the vehicle's driveline by a clutch which disengages the drive wheels from high effective inertia components in the driveline. The clutch is actuated by a signal produced by any of several sensors on the vehicle which sense a sudden braking event. Driveline speed is adjusted to match drive wheel speed before the clutch is deactivated to reengage driveline with the drive wheels. |
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DETAILED DESCRIPTION A system is provided for controlling inertial forces within a vehicle powertrain during certain operating conditions, such as sudden braking events.
The control system reduces these inertial forces through the use of relatively simple powertrain components such as clutches and existing vehicle sensors.
A further advantage of the present system resides in its compatibility with a wide range of HEV configurations and powertrain geometries.
In accordance with a first, non-limiting embodiment of the invention, a method is provided for controlling a vehicle powertrain during a braking event, which includes at least partially disengaging the powertrain from a set of traction wheels when the onset of the braking event is sensed.
The braking event is sensed using a variety of methods, including monitoring the vehicle's existing ABS (Antilock Braking System), or measuring the rotational speed of the traction wheels.
In one embodiment, a planetary gear in the transmission is controlled in a manner to disconnect the driveline from the traction wheels.
In another embodiment, an automatically actuated clutch is used to disconnect the powertrain from the wheels.
In still another embodiment, a slip clutch is used to partially disconnect the powertrain from the traction wheels, thereby reducing the counter-torque applied to the driveline by the traction wheels.
According to another non-limiting aspect of the invention, a hybrid vehicle drive system is provided that includes an internal combustion engine, an electric motor, a pair of vehicle traction wheels and a driveline connecting the traction wheels with the combination of the internal combustion engine and the electric drive motor.
The system also includes a vehicle braking system for applying brake force to the traction wheels during a braking event, and an inertial control system for controlling the effective powertrain inertia at the wheels during a vehicle braking event.
The inertial control system is automatically activated by control signals produced during a braking event
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