|The pro Hybrid EECVT concept. The battery sits in the module at the nose of the tractor, replacing the front weight.|
Case IH displayed a diesel-hybrid concept tractor at the recent Agritechnica show in Germany.
The ProHyrbid EECVT is based on a Case MXM tractor and combines a 120 kW (160 hp) diesel engine offering 800 Nm torque with two 50kW (67 hp) electric motor/generators. The prototype draws on technology from the Steyr continuously variable transmission (CVT) now used in Case’s CVX tractors.
One of the motors acts as a generator providing electrical power to the other which serves as a traction motor. Excess energy is stored in a large 456V, 11.5 kWh battery that sits on the tractor’s nose in place of a front weight.
Regenerative braking recharges the battery. In addition to an all-electric mode operation, the system can channel drive from both electric motors and the diesel engine through the transmission as required.
Case is exploring the use of electrical power to drive implements. The project has been under development since 1999 and several units have been working out in the field but as yet Case says it has no plans to introduce the concept.