August 9, 2017
Doosan Construction Equipment says its new DL420-5 CVT (continuously variable transmission) is its wheel loader to combine the benefits of a traditional automatic transmission and a hydrostatic transmission in one machine.
Continuously Variable Transmission (CVT)
The CVT transmission design automatically transitions from a hydrostatic transmission to an automatic transmission to operate at higher speeds. Unlike torque converter transmissions, the DL420-5 CVT wheel loader’s automatic transmission is a one-to-one ratio with the engine. Automatic transmission is said to improve powertrain efficiency in load-and-carry operations.
With this new transmission offering, operators should see an increase in machine performance and productivity for operators working in digging, loading, and lifting applications.
For most tasks, operators will use the hydrostatic part of the transmission, which is more efficient than an automatic transmission in low-speed applications. The hydrostatic part of the transmission provides good overall performance at lower engine rpms. An on-board color and text indicator on the dash panel informs operators when the machine is operating in the hydrostatic mode.
Hydrostatic wheel loader transmissions have several benefits, including the following:
Selectable power modes
Operators can select between three power modes that adjust the maximum engine rpm based on the operator’s preference and the application.
An auto-shutdown system is available on the new DL420-5 CVT wheel loader to help operators save fuel during non-working conditions. Operators can configure the idle time before auto shutdown, from 3 to 60 minutes. When enabled, the feature will shut down the wheel loader’s engine when the preset idle time is met.
The DL420-5 CVT comes in a high-lift iteration for extra reach and dump height. Added dump height is particularly useful for operators who regularly load trucks and need additional lift height to efficiently unload material into a truck or hopper. The high-lift iteration provides an additional 18 inches of dump height.
Quick Look: DL420-5 CVT wheel loader