Patent
Method and apparatus for maximum and minimum output torque performance by selection of hybrid range state and input speed for a hybrid powertrain system
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TLDR
In this paper, a powertrain system includes an engine mechanically coupled to an electro-mechanical transmission selectively operating in one of a plurality of transmission operating range states and engine states.Abstract:
A powertrain system includes an engine mechanically coupled to an electro-mechanical transmission selectively operative in one of a plurality of transmission operating range states and one of a plurality of engine states. A method for controlling the powertrain system includes determining a current transmission operating range state and engine state, determining at least one potential transmission operating range state and engine state, providing an operator torque request, determining preferability factors associated with the current transmission operating range state and engine state, and potential transmission operating range states and engine states, preferentially weighting the preferability factors for the current transmission operating range state and engine state, and selectively commanding changing the current transmission operating range state and engine state based upon the preferability factors and the operator torque request.read more
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References
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Optimal selection of input torque considering battery utilization for a hybrid electric vehicle
TL;DR: In this paper, a preferred input torque for a hybrid powertrain is determined within a solution space of feasible input torques in accordance with a plurality of powertrain system constraints that results in a minimum overall power-train system loss.
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Method of undervoltage protection during engine cranking
TL;DR: In this paper, a method for controlling the cranking of an engine of a vehicle powertrain system having a rechargeable energy storage system that is adapted to provide electric power to an electric machine was proposed.
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Method and apparatus to control engine restart for a hybrid powertrain system
TL;DR: In this paper, a control scheme for stopping an internal combustion engine of a hybrid powertrain during ongoing vehicle operation is described, executed as program code in an article of manufacture, consisting of the following steps in the sequence set forth.
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Driveline lash estimation and clunk management using multivariable active driveline damping
TL;DR: In this article, a multivariable feedback control approach is used to provide active driveline damping for a powertrain system with multiple torque-generative and torque control devices.
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Vehicle propulsion system
TL;DR: A vehicle propulsion system includes an internal combustion engine having an engine output, an electro-mechanical transmission and a control system as mentioned in this paper, which is coupled to the transmission output at a speed ratio which is established by one of a plurality of electrically variable or fixed operating modes.
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