SYSTEMATIC CONFIGURATION AND MODE DESIGN FOR POWER SPLIT HYBRID VEHICLES USING MULTIPLE PLANETARY GEARS

摘要

An automatic modeling and screening method capable of exhaustively searching through all configurations with all possible clutch locations and operating modes for a hybrid vehicle. By combining this method with Power-weighted Efficiency Analysis for Rapid Sizing (PEARS), a near-optimal and computationally efficient energy management strategy, it is feasible to search through an extremely large design space of configuration, component sizing and control to identify optimal designs for hybrid power vehicles.

主权项

1. A computer-implemented method of designing a planetary gear power-split hybrid powertrain having EV modes and hybrid modes, said method comprising:
a first step of analyzing a target cycle or a number of target cycles having a plurality of speed and acceleration cells and storing in a first memory location; a second step of determining EV mode efficiency, hybrid mode efficiency, and regenerative braking efficiency based on said first plurality of speed and acceleration cells and storing in a second memory location; a third step of calculating presumed fuel consumption by calculating required energy for said EV mode, determining hybrid/EV mode, and comparing required battery energy using a processor to determine a first design candidate; and repeating said steps for the target cycle or cycles to determine a second design candidate and determining with said processor which of said first design candidate and said second design candidate comprises the lowest preferred fuel consumption.