Torque-multiplication: A Euro 7-ready diesel supercar?

At Trident Sports Cars Ltd., the signature feature of the Iceni sports car drivetrain is the team’s unique torque-multiplication technology, for which the company holds 64 patents. When it’s harnessed with a modified 6.6L turbo-charged direct-injected V8 Duramax diesel engine from General Motors Co. (GM, Detroit, MI, US), and Trident’s own six-speed automatic or manual transmissions, the Iceni models powered by the combination are fully compliant with Euro 6 diesel emissions legislation that phases in this year. In fact, Trident’s powerplant surpassed Euro 6 requirements in 2008, and in 2012 it surpassed Euro 7 emissions mandates, which won’t become law until 2020. 

Duramax engines typically power GM full-size pickups and commercial vans — vehicles known for power/torque, not speed. Nevertheless, the above combination enables the base Iceni to accelerate 0-97 kmh in 3.7 seconds and top out at 306 kmh, putting it in supercar territory. The base vehicle produces 397 hp and 700 lb/ft of torque, but engine upgrades can boost that to 430 and 660 hp, producing 950 and 1,050 lb/ft — more than three times the torque of a typical high-end sports car or supercar — and accelerating 0-97 kmh in 3.2 and 2.9 seconds, respectively.

“Just as everyone thinks there’s no substitute for cubic inches in the engine,” explains Trident’s Phil Bevan, “they also obsess over crankshaft horsepower. What they fail to realize is that if you’re running a car at 8,000-9,000 rpm, you’re going through fuel at a rapid clip. We’ve taken a different approach and change gears at 3,000 rpm. By cutting engine revs by more than 50%, we also halve fuel use and emissions. People overlook the value of torque.” But Bevan observes that the low horsepower/high torque that defines Trident vehicles can be both blessing and curse because it yields a … different driving experience. No potential customer of a Trident Iceni can buy a car without a test drive or two.  

Another unique aspect of all Trident’s vehicles is that they feature multi-fuel engines that will run on any oil-based fuel, from conventional diesels or bio-diesel to mineral oil, paraffin, kerosene and central-heating oil. When fueled by annually renewable, carbon-fixing, plant-based bio-diesel (e.g., from new or used cooking oil), the vehicles offer another unique benefit: Plants from which cooking oils are derived absorb carbon and nitrogen (greenhouse gases) during their growing cycle. When they are harvested, and ultimately used to make a bio-fuel, they represent a credit — a net carbon offset. When bio-diesel is burned in the Trident vehicle, the owner, in theory, cashes in on the carbon credit from the plant’s work during its lifecycle, especially if the fuel is made from used cooking oil. Then the vehicle technically operates at a zero (net) carbon footprint.

Onboard diagnostics and computer-controlled systems will sense fuel changes from tank to tank and automatically adjust various combustion conditions and other ratios to maximize efficiency. To reduce emissions further, a new feature, hydrogen injection, will kick in and burn any unburned fuel and particulates when the engine isn’t operating at maximum efficiency.

This short article is a sidebar to a feature article titled "Bespoke sports cars' body speaks volumes" and a companion sidebar titled "Chassis: Unique achitecture and materials" To read either article, click on its title under "Editor's Picks," at top right.