Koenigsegg Jesko engine deep dive: The world’s most-powerful manufacturing engine

The Koenigsegg Jesko burst onto the scene at this yr’s Geneva Worldwide Motor Present with as much as 1,600 horsepower and another unbelievable specs, however let’s take a better look into its superb powerplant.

Jason Fenske is our host on this journey into the Jesko’s 5.Zero-liter twin-turbo V-Eight in an Engineering Defined video. First issues first: the 1,600-hp score comes with E85 within the tank. A sensor tells the engine what sort of gasoline the engine is utilizing, both 91-octane gasoline or E85. On 91 octane, Koenigsegg says the engine will make 1,280 hp. E85, nonetheless, permits the engine to advance its timing (no want to fret about knock points), crank up the enhance, and regulate the air-to-fuel ratio’s flexibility.

Koenigsegg Jesko, 2019 New York Worldwide Auto Present

If an engine goes to make quite a lot of energy, it’s going to want quite a lot of gasoline. Thus, the Jesko is the primary manufacturing automobile with three gasoline injectors per cylinder. The injector placement can also be fairly intelligent. By injecting gasoline earlier, there’s extra time for it to combine with the air round it. That is good for chilly begin and low rpm and low load conditions.

Koenigsegg Jesko, photograph by Keno Zache

Emissions needed to be thought-about as nicely. For this, Koenigsegg modified the design of the consumption ports to create a tumble movement that brings in higher-velocity air. Once more, this helps for low rpm and cargo conditions when the automobile must be extra environment friendly.

One other attention-grabbing tweak Koenigsegg made to the engine was a swap from a cross-plane to a flat-plane crankshaft for larger revving (and decrease weight). That enables this engine to spin to eight,500 rpm (from Eight,250). The corporate offers with a flat-plane crank’s inherent vibration subject by utilizing lively engine mounts. 

The Jesko derives a lot of its energy from a pair of huge turbos, and everyone knows the bigger the turbos the longer they take to spool up. The cope with this subject, the automobile has devoted tanks, every pressurized to 290 psi of enhance by an electrical air compressor. Hit the throttle at decrease rpm, and a shot of air comes from these tanks to supply speedy enhance with out turbo lag. This technique weighs lower than going with quad turbos. The tanks additionally inject air into the exhaust upon startup to heat up the catalytic converter, and that reduces emissions.

Lastly, the Jesko has a stress sensor to measure the stress contained in the cylinders, an business first although Mazda is not far behind. It measures the time between when the spark is ignited and most stress is reached within the cylinder. The ECU can then regulate the system to fireplace the spark so max stress is achieved when the piston reaches prime useless heart. That improves each energy and effectivity.

For a extra detailed rationalization of the ideas described right here, geek out on the world’s strongest homologated manufacturing engine by clicking on the video above.

—Senior Editor Kirk Bell contributed to this report.