Vehicle transmission shift quality
AssigneeRicardo UK Limited
InventorJonathan Charles Wheals
Life of this patent
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Abstract
A vehicle powertrain modelling system includes a powertrain model (20), a vehicle model (30), a seat model (55), a driver model (60) and a correlation element (50) comprising a neural network. As a result vehicle development is enhanced, using the neural network (50) to correlate modelled shift aspects with previous subjectively obtained ratings.
Claims11
A vehicle powertrain modeling system for modeling the performance of a vehicle during a gear shift, the system comprising:
- (a) a transmission shift parameter model element representing powertrain factors affecting shift quality;
- (b) a vehicle model element representing the dynamics/physical characteristics of the vehicle under consideration;
- (c) a driver parameter model element representing driver subjectivity during a particular gear shift, wherein a PID control technique is used to derive a metric associated with the neuromuscular feedback required by the driver to maintain seated posture during a particular gear shift;
- and
- (d) a correlation element to correlate data from said model elements with ratings of gear shift quality, wherein gear shift quality is the performance of the vehicle during a gear shift as perceived by the driver of the vehicle.
A method of modeling a vehicle transmission comprising the steps of designating a vehicle maneuver including a particular gear shift, vehicle speed and longitudinal acceleration, modeling associated transmission shift parameters, modeling associated driver parameters, and correlating the modeled parameters with ratings of gear shift quality, wherein the gear shift quality is the performance of the vehicle during a gear shift as perceived by the driver of the vehicle, the method including an assessment of driver subjectivity during a particular gear shift using a PID control technique to derive a metric associated with the neuromuscular feedback required by a driver to maintain seated posture during a particular gear shift.
A system for modeling vehicle driver subjectivity during a particular gear shift, the system comprising a PID controller for deriving a metric associated with the neuromuscular feedback required by the driver to maintain seated posture during a particular gear shift as part of an assessment of gear shift quality, wherein gear shift quality is the performance of the vehicle during a gear shift as perceived by the driver of the vehicle.
Dependencies are inferred from the claim text.