Active Cylinder Deactivation & Dual-Clutch Transmissions in Modern Indian Commuters

Fuel efficiency remains the top purchase consideration for the vast majority of Indian car buyers. To meet stringent Corporate Average Fuel Economy (CAFE III) emission standards without sacrificing performance, automotive engineers are bringing advanced cylinder deactivation and intelligent dual-clutch transmission technologies into mainstream commuter segments.

Active Cylinder Technology (ACT) utilizes electromagnetic actuator pins on the camshaft to slide cam lobes and shut down the intake and exhaust valves of cylinders 2 and 3 during low-load conditions—such as steady cruising at 70 to 90 km/h on an expressway. The transition between 2-cylinder and 4-cylinder operation takes less than 13 milliseconds, completely imperceptible to the driver, while improving highway fuel efficiency by up to 12%.

Simultaneously, dual-clutch automatic transmissions (DCT / DSG) have evolved with localized wet-clutch packs and optimized transmission cooling lines designed specifically to handle heavy Indian city traffic. By pre-selecting the next gear on an alternating secondary shaft, dual-clutch systems execute lightning-quick gearshifts in under 200 milliseconds, maximizing engine power delivery while avoiding hydraulic torque converter slippage.