American LaFrance partners with Bosch Rexroth Corporation for hydraulic hybrid project
Bosch Rexroth Corporation and American LaFrance, LLC have been selected to demonstrate hydraulic hybrid vehicle technology in a refuse truck by installing the Bosch Rexroth Hydrostatic Regenerative Brake (HRB) system in an American LaFrance Condor chassis for field testing in New York City and Baltimore.
The overall goal of the project is to assist widespread application of hydraulic hybrid powertrains in vehicle fleets, such as refuse haulers, that have been identified as having high potential for successfully using this technology to reduce fuel consumption and emissions, along with reduced operating and maintenance costs and improved performance.
The Department of Sanitation - New York City (DSNY) and the City of Baltimore Bureau of Solid Waste (BSW) will host the field tests.
American LaFrance, LLC will participate by providing each city with a prototype truck chassis into which the HRB system will be installed.
Technical support is being provided by New West Technologies, LLC and additional sponsorship is provided by the New Jersey Bureau of Public Utilities, the Maryland Energy Administration, and the Maryland Department of Environment.
The objective of the field tests is to validate the technical and economic characteristics of the system, a key step in deploying this product to large numbers of in-service and new vehicles.
“The Department of Sanitation is pleased to participate in the planned field testing of Bosch Rexroth’s Hydrostatic Regenerative Brake System. Sanitation travels 6,300 curb miles daily to collect 12,000 tons per day of refuse throughout the five boroughs of New York City. The daily house-to-house collection service provided by the Department in stop and go traffic is a true test for this type of technology. We await the results of the testing for further Department evaluation,” said John J. Doherty, New York City Department of Sanitation Commissioner.
The proprietary HRB system uses a hydraulic pump/motor, connected to the driveline, to capture kinetic energy during vehicle braking. The overall process is called regenerative braking.
Hydraulic hybrids offer the potential for significant reductions in fuel consumption, emissions and brake wear. As compared to hybrid electric powertrains now entering the market, hydraulic hybrids appear to be better suited for the very high power-handling requirements encountered during regenerative braking, and they require fewer efficiency-robbing energy conversion steps. These factors indicate the potential to capture a larger portion of the braking energy for efficient use.