BorgWarner R2S two-stage turbo boosts performance of new top-end Ford 2.0L diesel
22 June 2015
BorgWarner’s regulated two-stage (R2S) turbocharging technology is improving the performance and fuel economy of Ford’s new 2.0-liter TDCi diesel engine, the first Ford engine for passenger cars equipped with a two-stage turbocharging system. The high-performance engine, being offered in Mondeo, S-MAX and Galaxy models in Europe, achieves an output of 155 kW (210 PS) and a maximum torque of 450 N·m from 2000 rpm and will replace the 2.2-liter TDCi diesel engine.
BorgWarner’s R2S turbocharging technology consists of two turbochargers arranged in series to deliver improved torque and smooth power over the entire engine speed range. One compact KP35 high-pressure turbocharger generates boost pressure at low exhaust gas flow rates for rapid acceleration at low engine speeds without delay or turbo lag. As engine speed increases, the exhaust gas stream is split, and the larger K04 low-pressure turbocharger works in series with the KP35 high-pressure turbocharger.
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The larger K04 charger pre-compresses the intake air, and the smaller KP35 turbo compresses it even more. At higher rpm rates, nearly all gases flow directly through a bypass valve to the K04 low-pressure turbocharger, which takes over the workload to maintain fluid power delivery at higher speeds.
The R2S turbocharging technology fulfills the requirements of state-of-the-art engine concepts, providing maximum exhaust gas recirculation rates even under full load conditions while significantly reducing emissions.
The new high-powered TDCi diesel engine follows the downsizing trend we’ve led with our EcoBoost petrol technology. Smaller engines deliver better fuel efficiency and emissions, and we claim the power back with advanced technology. Sequential bi-turbo technology delivers the seamless performance consumers want every day in all conditions, and makes turbo-lag a distant memory.
—Andrew Brumley, chief engineer, Ford Engine Programs, on the launch of the new Galaxy
Ford is also offering an enhanced 2.0-liter TDCi diesel engine variant with single variable geometry turbocharger technology is offered in 120 PS, 150 PS and 180 PS ratings, featuring a revised engine block, new cylinder-head and fuel injection designs, and lean NOx trap exhaust after-treatment system for cleaner emissions.
Impressive power density for a diesel with over 100 hp/liter. The GM 2.0 liter SIDI gasoline engine gets just over 135 hp/liter and is one of the most power dense non-race engines.
Posted by: sd | 22 June 2015 at 02:28 PM
The new VW 2-liter diesel has 240 hp.
A lean NOx trap is interesting aftertreatmen at this engine size/power level.
Posted by: Peter_XX | 22 June 2015 at 11:22 PM