（ultracapacitor搭載HEVトラックについて）

Hybrid Truck Users Forum WG Selects Electric and Hydraulic Hybrid Suppliers
Rexroth hydrostatic regenerative braking system (HRB) reduces fuel consumption by up to 25% and can be retrofitted as an add-on system even in vehicles without hydraulics.
http://www.greencarcongress.com/2008/03/hybrid-truck-us.html#more
31 March 2008
The members of CALSTART’s Hybrid Truck Users Forum (HTUF) Refuse Working Group have selected the supplier team of Crane Carrier/ISE/Bosch Rexroth to negotiate with for validation and testing of Class 7 & 8 heavy-duty electric hybrid and hydraulic hybrid refuse vehicles.The hybrid trucks are expected to yield 30% to 50% reductions in fuel use with an accompanying reduction in emissions, to be demonstrated in chassis dynamometer and field testing. The working group members taking part in the hybrid refuse truck pilot project include the Department of Sanitation, City of New York; Solid Waste Management Department, City of Houston; and the City of Chicago.Electric hybrid. Crane Carrier Company, working in conjunction with ISE Corporation, proposed a series hybrid electric refuse vehicle (HEV) using a self-contained hybrid drive assembly that can be easily mounted between the frame rails in most truck chassis. It replaces the conventional manual or automatic transmission assembly in the Crane Carrier LET2 chassis. The proposed HEV system uses components that have already been developed by ISE for the transit market in heavy 60 ft. articulated bus applications. The HEV will use nickel-metal hydride (NiMH) batteries or ultra-capacitor packs to store energy recovered from the high number of braking cycles experienced by refuse collection vehicles during their normal operation. The HEV will also employ an onboard GPS and Remote Diagnostic Unit (RDU) providing the capability for real time performance monitoring and remote troubleshooting. The RDU conveys location, vehicle status and offers web-based access.Hydraulic hybrid. Crane Carrier and Bosch Rexroth Corporation have proposed using Rexroth’s Hydrostatic Regenerative Brake (HRB) parallel hydraulic hybrid system to power their LET2 chassis. The HRB system will be integrated with the Heil refuse body hydraulic system for weight savings and more efficient packaging.The HRB system uses a hydraulic pump/motor, connected to the driveline, to capture kinetic energy during vehicle braking. When braking, the pump/motor acts as a pump, absorbing energy from the driveline and imparting a retarding force on the drive wheels. The absorbed energy pumps hydraulic fluid into a nitrogen-pressurized accumulator. During acceleration the pressurized gas pushes fluid out of the accumulator and the pump/motor now acts as a hydraulic motor, assisting the engine and reducing the fuel required to launch the vehicle.
Resources
Simon J. Baseley, Christine Ehret, Edward Greif, Markus Kliffken; Hydraulic Hybrid Systems for Commercial Vehicles (SAE 2007-01-4150)

ここにはトップやアーカイブページで省略される（記事単独ページでだけ表示される）文章を書きます。

[続きを読む]