A hydraulic hybrid excavator based on multi-chamber cylinders and secondary control – design and experimental validation. Issue 2 (4th May 2018)

• Record Type: Journal Article
• Authors: Heybroek, Kim; Sahlman, Mika
• Is Part Of: International journal of fluid power. Volume 19:Issue 2(2018)
• Page Start: 91
• Page End: 105
• Publication Date: 2018-05-04
• Subjects: Secondary control -- digital hydraulics -- multi-chamber cylinder; Fluid power technology -- Periodicals; Fluid mechanics -- Periodicals; Fluid mechanics; Fluid power technology; Periodicals; 621.205
• DOI: 10.1080/14399776.2018.1447065
• Languages: English
• ISSNs: 1439-9776

Abstract

Abstract: In this paper, a special type of multi-chamber cylinders along with secondary controlled hydraulic motors are key components in the design of a highly efficient hydraulic series hybrid system. The system is developed for and tested on a large excavator (30-ton class). The evaluated system supports potential and kinetic energy recovery and storage using hydraulic accumulators. Through proper sizing of components and sophisticated valve control, an energy-efficient, flexible and robust hybrid system is achieved. The study describes how the demonstrator is tested in real truck loading cycles. A detailed energy analysis is also presented to explain the energy flow inside the hybrid system.