A control system 100 for determining when to start an internal combustion engine of a parallel hybrid electric vehicle having an electric motor connected to a wheel axle of the vehicle through a transmission of the vehicle. The control system 100 comprises one or more controllers 110 and is configured to receive a signal 165 indicative of a current wheel torque demand; compare the current wheel torque demand to a torque reference to generate a comparison result, wherein the torque reference is based on a decay-based approximation of an actual maximum electric motor wheel torque capacity across states of the transmission; and output an engine start signal 155 in dependence on the comparison result.
Engine start point improvement across gear shifts
2023-04-26
Patent
Electronic Resource
English
MANAGING ENGINE FIRING FRACTION CHANGES DURING GEAR SHIFTS
European Patent Office | 2020
|Managing engine firing fraction changes during gear shifts
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|Managing engine firing fraction changes during gear shifts
European Patent Office | 2023
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