METHOD FOR OPERATING A MOTOR VEHICLE
First Claim
1. A method for operating a vehicle having an engine, comprising:
- receiving, by a controller, a first signal corresponding to at least one of vehicle speed and vehicle acceleration;
receiving, by the controller, a second signal corresponding to at least one of tire pressure and braking pressure;
receiving, by the controller, ambient data corresponding to at least one of air temperature, wind speed, and wind direction;
receiving, by the controller, a third signal corresponding to a distance to a forward vehicle; and
disengaging the engine from a vehicle powertrain in response to a freewheeling distance exceeding a corresponding threshold, the freewheeling distance calculated by the controller based on the first, second, and third signals and the ambient data.
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Accused Products
Abstract
A method for operating a motor vehicle generates a change-operating-mode signal to change operation from a normal mode with an engine engaged and running to a coasting mode with the engine disengaged and/or switched off in response to a freewheeling distance exceeding a threshold. The freewheeling distance may be based on state parameters of the motor vehicle, such as position, speed, acceleration, weight, tire pressure, braking pressure, and air resistance, for example, data related to a second vehicle obtained from forward sensors, for example, and/or ambient parameters such as air temperature, wind speed, and wind direction, for example.
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Citations
20 Claims
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1. A method for operating a vehicle having an engine, comprising:
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receiving, by a controller, a first signal corresponding to at least one of vehicle speed and vehicle acceleration; receiving, by the controller, a second signal corresponding to at least one of tire pressure and braking pressure; receiving, by the controller, ambient data corresponding to at least one of air temperature, wind speed, and wind direction; receiving, by the controller, a third signal corresponding to a distance to a forward vehicle; and disengaging the engine from a vehicle powertrain in response to a freewheeling distance exceeding a corresponding threshold, the freewheeling distance calculated by the controller based on the first, second, and third signals and the ambient data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vehicle comprising:
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an engine selectively coupled to a powertrain; and a controller configured to disengage the engine from the powertrain or stop the engine in response to a freewheeling distance exceeding a threshold, the freewheeling distance calculated by the controller using signals indicative of at least two of vehicle speed, vehicle acceleration, vehicle braking pressure, and distance to a forward vehicle. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method for controlling a vehicle having an engine selectively coupled to a driveline by an electrically controllable clutch, comprising:
stopping the engine in response to a freewheeling distance calculated by a vehicle controller exceeding an associated threshold, the freewheeling distance calculated in response to vehicle signals or data corresponding to at least three of vehicle speed, vehicle acceleration, braking pressure, distance to a forward vehicle, tire pressure, and vehicle weight. - View Dependent Claims (18, 19, 20)
Specification