Dana's fuel-efficient drive toward Intermat

  • 21-Feb-2012 11:38 EST
Dana - Spicer TZL16 Powershift Transmission.tif

The Spicer TZL16 powershift transmission is engineered to supply 17-t (18.7-ton) front-end loaders with higher horsepower capability, reduced maintenance, and smoother, quieter operation, says Dana.

Besides the R3 hydromechanical variable transmission (HVT), Dana will be debuting at Intermat in April the new Spicer 318 hydrostatic continuously variable transmission (HCVT) for compact front-end loaders and medium-sized telescopic boom handlers. The company will also present the Spicer TZL 16, the first in a line of powershift transmissions to be produced at Dana’s assembly facility in Wuxi, Jiangsu Province, China.

In October, Dana and Bosch Rexroth announced the completion of the companies’ 50-50 joint venture to develop and manufacture advanced powersplit drive transmissions for the off-highway market. Both are contributing staff, intellectual property, and capital to the new joint-venture company, which is based in Arco, Italy.

Dana Rexroth Transmission Systems' HVT R3 was designed for front-end loaders, graders, forestry skidders, and other off-highway applications requiring up to 265 kW (360 hp).

Tests on front-end loaders with the new HVT powersplit systems demonstrate fuel savings in the drivetrain of more than 20% when compared with the same vehicle outfitted with a conventional torque converter transmission, says the company.

The HVT improves productivity by enabling sensitive, precise vehicle positioning and stepless drive with no interrupted acceleration. It occupies the same space within the design envelope as conventional torque converter transmissions while allowing for engine downsizing. The HVT optimizes the operating point of the diesel engine by decoupling engine speed from drive speed, and maintenance costs are reduced by utilizing hydrostatic braking and wear-free directional reversals.

The Spicer 318 HCVT is targeted for front-end loaders with 6- to 9-t (6.6- to 9.9-ton) operating weights and telescopic boom handlers with 6000 to 10,000 kg (13,300 to 22,050 lb) lifting capacities. By capitalizing on the proven design of the Spicer 319 HCVT, the Spicer 318 HCVT allows Dana to offer a range of drivetrain solutions that meet the growing market demand for compact front-end loaders and medium-sized telescopic boom handlers.

Spicer's new HCVT combines high controllability with increased efficiency at high speeds by using two hydrostatic motors capable of working together to accommodate various displacement combinations. Typically configured with a large motor ranging from 80 to 115 cc and a smaller motor from 45 to 80 cc, the HCVT offers full CVT functionality without torque interruption as well as an increase in efficiency at high travel speeds of more than 20% over standard hydrostatic transmissions.

Dana will present the 318 as part of a telescopic boom handler system with up to 8000 kg (17,600 lb) lifting capacity that also includes Spicer Model 212 planetary steer axles and Spicer 10 Series driveshafts.

Also at the show will be the Spicer TZL16 powershift transmission, which is engineered to supply 17-t (18.7-ton) front-end loaders with higher horsepower capability, reduced maintenance, and smoother, quieter operation, says Dana. An enhanced TZL18 version designed for 21-t (23-ton) front-end loaders is planned shortly after the launch of the TZL16.

With an expected rating of 150 to 180 kW (200 to 245 hp) and a 555-mm (22-in) drop, the TZL Series is a new four-speed transmission platform that uses proven internal components from the extensive line of Spicer powershift transmissions already available for the off-highway market. It includes high-energy-capacity forward and reverse clutches, adaptive clutch modulation, and helical gears to deliver a robust transmission with improved shift quality.

The TZL16 also features two 400-N·m (295 ft·lb) SAE C pump drives with a variable pump ratio and wider 240-mm (9.4-in) pump spacing, which enables OEMs to take advantage of optimum displacement system pumps and hydraulic plumbing.

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