Caterpillar debuts D11 XE electric drive dozer
Caterpillar debuts D11 XE electric drive dozerCaterpillar last week unveiled a whole new line-up of mining equipment at the MINExpo 2021 held in Las Vegas, and its D11 XE electric drive dozer was one of the highlights of its new range.
The D11 XE is based on its D11 high capacity dozer, and runs an electric drive system which Caterpillar said delivers power to the ground more effectively, helps operators save fuel and is easier to operate as no gear changing is required.
The result is faster cycle times, improved fuel efficiency and greater pushing power, Caterpillar said.
Due to the reduction in serviceable components compared to a conventional dozer, the Cat D11 XE dozer is easier and cheaper to run as well, the company said. Caterpillar added when the model goes in production, it will be the world’s largest, most powerful and efficient electric drive dozer with high drive.
Running an electric drive does not mean the dozer is fully electric powered. The Cat D11 XE still runs a Cat diesel engine but instead of powering a torque converter, it drives a generator which turns the mechanical engine power into electricity.
Instead of a transmission, an electric motor powers the final drives. A power inverter is connected to both the generator and the motor by heavy-duty power cables and connectors, and this inverter controls the flow of electricity between the two components.
The electric motor can operate at all ground speeds, ensuring the dozer is always operating at the most efficient point possible.
Some of the benefits of the Cat D11 XE compared to a conventional dozer, Caterpillar said, includes:
- 25 per cent less fuel costs per bank cubic-metre (BCM)
- 20 per cent longer engine rebuild cycles
- 60 per cent fewer moving parts than a traditional power train which translates to better machine uptime availability
- Reduced service and maintenance
The D11 XE fully integrates Cat powertrain, Cat electronics, Cat software and Cat controls for optimised performance.
Updated electronics architecture allows operators to use proven Cat technologies such as MineStar™ Command for dozing, which offers both remote control and semi-autonomous dozing.
The new dozer’s modular design means operators and technicians can access all serviceable parts easily for simplified maintenance and less downtime. This electric drive dozer also shares components with mechanical drive models, meaning familiarity for service technicians and fewer parts to stock for owners.
The D11 XE is currently operating at Caterpillar’s dozer proving grounds in Peoria, Illinois, and will then complete an extensive field validation plan before entering full production.
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