HYBRID VEHICLE HAVING AN ENGINE AND A FLYWHEEL WHICH ALTERNATIVELY DRIVE THE VEHICLE AT LOW SPEED IN A PULSATILE WAY

摘要

A hybrid vehicle having a series-parallel architecture, i.e. a mechanic (gears) and an electric (generator (4), inverter (7), and motor (6)) propulsion chains associated by a planetary gear mechanism (2) powered by an engine (1). The generator rotor (4), with or without a flywheel (3), provides a kinetic energy storage due to its high inertia and speed. The stored energy is sufficient to drive simultaneously, the vehicle at low speed, and the not-fueled engine (1), during short periods. Between these periods, the fueled engine drives the vehicle and restores the stored kinetic energy. The succession of these periods made operation pulsatile at higher maximum power. Higher power means better efficiency. In addition, less pollution and perturbation compare to the “stop and start” are expected.

主权项

1. A power transmitting system for hybrid vehicle comprising:
a first planetary gear mechanism (2) for power derivation, having an input shaft, an output shaft, and a pilot shaft; an electric generator (4) connected to the pilot shaft, having a high inertia rotor or a rotor coupled to a flywheel (3) which drives the vehicle, the generator (4) and the engine (1) during the passive phases; an electric motor (6) able to absorb power from the generator (4) coupled to the output shaft driving the vehicle wheels (5); a battery (8) able to absorb or to release the electric power balance of the vehicle; an engine (1), including an engine shaft connected to the input shaft of the planetary gear mechanism (2), which drives the vehicle, the generator (4) and the flywheel (3) during the active phases; a valve system (11) for cyclically shutting down the fuel supply for the engine (1) during the passive phases and opening the fuel supply for the engine (1) during the active phases; an inverter (7) able to transfer and to control the electrical energy between the generator (4) and the motor (6) both reversible; a control-command unit of the system which provides calculation resources and triggers the actives phases and the passive phases.