Photo: Volkswagen
Volkswagen has unveiled a new turbocharged gasoline engine, which will feature the first variable-geometry turbocharger found in a volume car with a spark-ignited unit.
The new power plant is called the TSI Evo and it is a 1.5-liter turbocharged unit. Since we are talking about a TSI, the engine is spark-ignited and is fueled with gasoline.
In spite of the impressively high compression ratio of 12.5:1, the unit runs on 95-octane gasoline (commonly found in Europe), and it even has the ACT cylinder deactivation feature. Furthermore, the unit is ready for E10 gasoline, a type of fuel that contains bio-ethanol.
The carmaker uses the Miller combustion cycle on the new powertrain. Volkswagen has announced the unit will provide two power levels, and we expect to see it in a multitude of models from the company’s portfolio. The low-power version comes with 130 HP, while the high-power version provides 150 HP.
According to a Volkswagen spec-sheet, the 130 HP variant of the new 1.5-liter TSI Evo engine provides a maximum torque of 200 Nm (147 lb-ft). The coolest part about this engine is that peak torque is reached at a mere 1,300 rpm, and that the unit maintains a flat torque line at the value mentioned above up to 4,500 rpm. Peak output comes just 250 rpm higher, at 4,750 rpm, and is maintained up to 5,500 rpm.
Along with a variable geometry turbocharger, the first of its kind in a mass-market gasoline engine, Volkswagen fitted the 1.5-liter TSI Evo engine with 350-bar injectors, while the cooling module is electronically operated. The latter works this way to ensure optimal thermal management.
The high-power version of the 1.5-liter TSI Evo engine comes with atmospheric plasma spray coating of the cylinder walls of its aluminum block. Other mechanical improvements include charge-air cooling and integration of an exhaust manifold with thermodynamic benefits for better fuel economy. Volkswagen claims that the efficiency gains are at 10% when compared to the previous 1.4-liter TSI unit and consumption is reduced by about one liter per 100 kilometers.
In spite of the impressively high compression ratio of 12.5:1, the unit runs on 95-octane gasoline (commonly found in Europe), and it even has the ACT cylinder deactivation feature. Furthermore, the unit is ready for E10 gasoline, a type of fuel that contains bio-ethanol.
The carmaker uses the Miller combustion cycle on the new powertrain. Volkswagen has announced the unit will provide two power levels, and we expect to see it in a multitude of models from the company’s portfolio. The low-power version comes with 130 HP, while the high-power version provides 150 HP.
According to a Volkswagen spec-sheet, the 130 HP variant of the new 1.5-liter TSI Evo engine provides a maximum torque of 200 Nm (147 lb-ft). The coolest part about this engine is that peak torque is reached at a mere 1,300 rpm, and that the unit maintains a flat torque line at the value mentioned above up to 4,500 rpm. Peak output comes just 250 rpm higher, at 4,750 rpm, and is maintained up to 5,500 rpm.
Along with a variable geometry turbocharger, the first of its kind in a mass-market gasoline engine, Volkswagen fitted the 1.5-liter TSI Evo engine with 350-bar injectors, while the cooling module is electronically operated. The latter works this way to ensure optimal thermal management.
The high-power version of the 1.5-liter TSI Evo engine comes with atmospheric plasma spray coating of the cylinder walls of its aluminum block. Other mechanical improvements include charge-air cooling and integration of an exhaust manifold with thermodynamic benefits for better fuel economy. Volkswagen claims that the efficiency gains are at 10% when compared to the previous 1.4-liter TSI unit and consumption is reduced by about one liter per 100 kilometers.
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