There is a certain question mark over the future of diesel engines globally, and with rumours of higher taxation in markets like India, the future of oil burners looks bleak. The gulf between the internal combustion engines (ICE) and cleaner battery-powered sources has been bridged by hybrid powertrains in the last few years.
Most of these powertrains feature a petrol engine but in Toyota’s case they have a mild-hybrid system featuring a diesel engine. Let us get into the details of the working of the new diesel mild-hybrid engine from Toyota and how it can breathe life into the dying breed of diesel engines.
Toyota 48V mild-hybrid diesel: How does it work?
Recently, the Japanese carmaker shared details about the working of its new mild-hybrid diesel engine through an official video on YouTube. It consists of three main components, including a belt-driven electric motor-generator that replaces the conventional alternator, a 48-volt battery as well as a DC-DC converter.
Toyota points out the difference between this mild-hybrid powertrain and the brand’s Hybrid System II (THS II), with the latter comprising two motor-generators and a power split device. The benefit of the mild hybrid setup is that it can be fitted to existing powertrains.
The company claims that the belt-driven electric motor-generator is capable of providing more torque than conventional gear-driven starters, with Toyota claiming the mild hybrid system allows for quiet engine restarts with smooth response and minimal vibration when using the stop/start function.
Watch Video: Toyota 48V mild-hybrid diesel working
Further, the electric motor provides torque assistance when needed, and regenerative braking restores energy to the battery, which helps power auxiliary systems such as steering, pumps, and fans. More importantly, Toyota claims an improved fuel economy of 10% over the existing 2.8-litre diesel engine.
The system is reportedly developed keeping the off-roading prowess of Toyota’s utility vehicles in mind. Power output will remain unchanged at 201 bhp and 500 Nm of peak torque. The strategic placement of the mild-hybrid system results in a water wading depth of up to 700 mm for models like Hilux and Land Cruiser Prado.
Toyota 48V mild-hybrid diesel: Expected India launch?
This new mild-hybrid tech recently made its debut in the new-gen Land Cruiser Prado slated to go on sale in North American markets in the next couple of months. It will make its debut in South Africa and Australia next year with the new generation Hilux. While Toyota hasn’t mentioned anything about the Indian market, this new 2.8-litre mild-hybrid is likely to make its debut with the new-gen Fortuner sometime in 2024.
