Method and system to avoid unintended engine on/offs for hybrid vehicles
First Claim
1. A method implemented by at least one controller for controlling a hybrid vehicle having an engine and a traction motor coupled to a driveline, comprising:
- inhibiting the engine from starting and stopping based upon (i) a rate of change of a power demand over time, and (ii) a difference between the power demand and a filtered power demand at one time exceeding a threshold.
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Accused Products
Abstract
A system and method for controlling a hybrid electric vehicle powertrain having an engine defining one power source, and a traction motor and electrical storage device defining another power source include inhibiting a stopping and a starting of the engine based upon an unintended tip-out event and an unintended tip-in event, respectively. The total power demand and the available electric power are determined. The total power demand is filtered. The engine is prevented from being pulled-up or pulled-down based upon a difference between the total power demand and the filtered power demand being exceeding a threshold. However, if the difference exceeds the threshold, and if the available electric power exceeds the total power demand, then the engine is permitted to pull-up or pull-down.
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Citations
6 Claims
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1. A method implemented by at least one controller for controlling a hybrid vehicle having an engine and a traction motor coupled to a driveline, comprising:
inhibiting the engine from starting and stopping based upon (i) a rate of change of a power demand over time, and (ii) a difference between the power demand and a filtered power demand at one time exceeding a threshold. - View Dependent Claims (2, 3)
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4. A vehicle comprising:
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an engine for providing torque to wheels; a traction motor coupled to a driveline and capable of providing torque to the wheels; and a controller configured to inhibit the engine from starting and stopping based at least upon (i) a rate of change of a power demand over time, and (ii) a difference between the power demand and a filtered power demand at one time exceeding a threshold. - View Dependent Claims (5, 6)
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Specification