Adaptive torque mitigation by micro-hybrid system
First Claim
1. An electric motor/generator controller for operating a motor/generator used as an auxiliary torque source/sink in a hybrid powertrain, the hybrid powertrain including an internal combustion engine that operates in a firing sequence, the motor/generator controller comprising:
- a matched basis function control module arranged to generate a control signal for the electric motor/generator, wherein the matched basis function control module is configured to receive a parameter indicative of a firing sequence length, a parameter indicative of a firing sequence phase, a crank angle signal, and a NVH metric signal as inputs and to generate the control signal for the electric motor/generator based at least in part of the received parameter indicative of the firing sequence length, firing sequence phase, the crank angle signal, and the NVH metric signal.
1 Assignment
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Accused Products
Abstract
A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a dynamic firing level modulation manner. A smoothing torque is determined by adaptive control that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.
156 Citations
21 Claims
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1. An electric motor/generator controller for operating a motor/generator used as an auxiliary torque source/sink in a hybrid powertrain, the hybrid powertrain including an internal combustion engine that operates in a firing sequence, the motor/generator controller comprising:
a matched basis function control module arranged to generate a control signal for the electric motor/generator, wherein the matched basis function control module is configured to receive a parameter indicative of a firing sequence length, a parameter indicative of a firing sequence phase, a crank angle signal, and a NVH metric signal as inputs and to generate the control signal for the electric motor/generator based at least in part of the received parameter indicative of the firing sequence length, firing sequence phase, the crank angle signal, and the NVH metric signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for operating an electric motor/generator used as an auxiliary torque source/sink in a hybrid powertrain, the hybrid powertrain including an internal combustion engine that operates in a firing sequence, the method comprising:
generating a control signal for the electric motor/generator using a matched basis function control algorithm to provide an acceptable NVH metric, wherein the control signal is adjusted based at least partially on an energy consumption consideration of the internal combustion engine, wherein the NVH metric is dependent on a transmission gear. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for operating an electric motor/generator used as an auxiliary torque source/sink in a hybrid powertrain, the hybrid powertrain including an internal combustion engine that operates in a firing sequence, the method comprising:
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generating a control signal for the electric motor/generator using a matched basis function control algorithm to provide an acceptable NVH metric, wherein an NVH metric signal is based on a crankshaft rotation signal or a time derivative thereof, wherein the crankshaft rotation signal or a time derivative thereof is filtered by an NVH filter module and a vehicle response filter module to obtain the NVH metric.
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21. A method for operating an electric motor/generator used as an auxiliary torque source/sink in a hybrid powertrain, the hybrid powertrain including an internal combustion engine that operates in a firing sequence, the method comprising:
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generating a control signal for the electric motor/generator using a matched basis function control algorithm to provide an acceptable NVII metric, wherein an NVH metric signal is based on a crankshaft rotation signal or a time derivative thereof, wherein the NVH metric signal is dependent on a transmission gear.
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Specification