The little-known hydraulic hybrid powertrain is alive and well, and slowly making in-roads in heavy-duty vehicles.
The technology, which uses hydraulics instead of electrical components to aid an internal combustion engine, is said to offer big efficiency benefits.
To be sure, though, it’s taken the hydraulic hybrid many years to find its place in the world of transportation. Within the past decade, manufacturers have placed it in pickups, buses, garbage trucks, excavators, full-sized vans, and even cars. In general, the technology fared better in heavy-duty vehicles and commercial applications.
In the following slides, we offer photos and schematics of hydraulic hybrid powertrains. From cars and vans to excavators and garbage trucks, here’s a peek at some of the most notable hydraulic hybrid efforts from the past few years.