Toyota, globally recognised for its expertise in petrol-electric hybrids, is reportedly still assessing the viability of diesel-electric hybrid technology.
While diesel hybrids have seen limited adoption globally, Toyota has yet to introduce a full diesel-electric hybrid powertrain.
According to CarExpert, Keita Moritsu, Toyota’s chief engineer, acknowledged the ongoing importance of diesel engines in specific markets, particularly for vehicles like the Land Cruiser. He noted, "Worldwide, diesel is a very important engine... but gasoline is the major technology in markets like America and China."
Despite this, he added, "the situation worldwide is changing," suggesting Toyota remains open to alternative powertrain technologies as the automotive landscape evolves.
Russel Tomlinson, Toyota Australia’s manager of research, evaluation and training, highlighted the engineering complexities of diesel-electric hybrid systems.
According to Tomlinson, while petrol-electric hybrids are well-optimised due to complementary torque profiles, integrating hybrid assistance with a diesel engine's inherent low-end torque presents unique challenges.
"The engineering and effort to put it in is the challenge," he remarked.
Toyota's current diesel-hybrid technology, branded as "V-Active," is a 48V mild-hybrid system featured in models like the Hilux Hybrid and Prado Hybrid.
However, this setup primarily reduces fuel consumption and does not support electric-only driving.
In contrast, competitors like Mercedes-Benz offer full diesel-electric hybrids in select markets, albeit not in Australasia.
Hybrid vehicles have gained significant traction in New Zealand, driven by government incentives and increasing consumer awareness of sustainability.
While Toyota's petrol-electric hybrids dominate the local market, diesel-electric hybrids could address the needs of industries reliant on diesel infrastructure, such as agriculture and forestry.
However, Toyota’s cautious approach means that customers in New Zealand may not see such options soon.
As the industry pivots towards electrification, Toyota’s ongoing assessment of diesel-hybrid systems reflects its broader commitment to reducing CO2 emissions through diverse technologies.
Whether this includes full diesel-electric hybrids in New Zealand remains to be seen.