A Hybrid Drive System for a Harvester

摘要

A hybrid drive system for an auxiliary load includes a hydraulic auxiliary power storage. This hydraulic auxiliary power storage has a plurality of hydraulic power storage units. The hybrid drive system further comprises an power exchange control system that selectively connects a predetermined selection of one or more of the hydraulic power storage units to the hydraulic auxiliary power unit; and controls the power exchange of the auxiliary power unit as a function of the operating period by the predetermined selection.

主权项

1. A hybrid drive system for a harvester comprising:
a main drive; a reservoir of hydraulic fluid; a hydraulic power storage for storing hydraulic fluid at a pressure higher than that of the reservoir; a hydraulic power unit mechanically connected to the main drive and hydraulically connected to the hydraulic power storage and to the reservoir; an intermittent auxiliary drive configured to be powered intermittently by the main drive during an operating period such that the main drive powers the intermittent auxiliary drive during an activated time period and the main drive does not power the intermittent auxiliary drive during a deactivated time period; a power exchange control system coupled to the hydraulic power unit and the hydraulic power storage; wherein the hydraulic power storage comprises a plurality of hydraulic power storage units; and the power exchange control system is configured to selectively connect a first subset and at least one other subset of one or more of the hydraulic power storage units to the hydraulic power unit as a function of a desired bidirectional power exchange between the main drive and the hydraulic power storage as a function of the operating period.