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1. (WO2018178924) A HYBRID DRIVE SYSTEM COMPRISING DUAL HYDRAULIC MECHANISMS

Pub. No.:    WO/2018/178924    International Application No.:    PCT/IB2018/052186
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Mar 30 01:59:59 CEST 2018
IPC: B60K 6/12
F16H 47/02
B60K 6/10
B60K 6/365
B60K 6/20
Applicants: DUCERE HOLDINGS (PTY) LIMITED
Inventors: GRANT, Norman
Title: A HYBRID DRIVE SYSTEM COMPRISING DUAL HYDRAULIC MECHANISMS
Abstract:
This invention relates to a hybrid drive system wherein a plurality of energy paths between a plurality of energy storage devices and energy sources, are utilised to optimise drive efficiency and performance thereof. The system comprises a first drive arrangement which comprises a first drive means (14), a power splitting arrangement (16) and a first hydraulic mechanism (20). The power- splitting arrangement is coupled to the first drive means. The first hydraulic mechanism is selectively operable as one of a pump and a motor, coupled to the first power-splitting gear arrangement, and has a first port in fluid flow communication with a hydraulic accumulator (26). The system furthermore comprises a second drive arrangement comprising a first energy storage device which is linked to the first drive arrangement. One of the first and second drive arrangements is linked to an output drive. In a preferred embodiment, the system comprises two directly linked power splitting gear arrangements (16, 40), each providing a differential function.