Here we take a closer look at some of the technologies in the new 2.0-litre 122ps Skyactiv-G petrol engine, which makes its debut in the All-New Mazda3.
- Mazda M Hybrid
The All-New Mazda3 sees the debut of Mazda’s Mazda M Hybrid system. Both the Skyactiv-G, and the soon to be launched Skyactic-X, petrol engines feature this 24v mild hybrid technology. A belt-driven integrated starter generator (ISG) converts the kinetic energy recovered during deceleration into energy and stores it in a 600KJ lithium-ion battery. A DC-DC converter alters the power to the appropriate voltage to supply the cars electrical system. In addition to improved economy, Mazda M Hybrid also helps drivability by substituting engine torque for motor torque when the car is starting, accelerating or coming to a stop. Even better, engine speed is adjusted by motor torque during upshifts to deliver a smoother gear change and subconsciously smoother clutch operation by the driver.
- Cylinder deactivation
Cylinder deactivation has been added to the evolved 2.0-litre Skyactiv-G in the All-New Mazda3. Delivering improved economy and enhanced efficiency, the system automatically switches between two-cylinder and four-cylinder operation depending on driving conditions, shutting down cylinders one and four in light load situations, such as when cruising at a constant speed. Intake volume, fuel injection and injection timing are all precisely controlled so that the cylinder deactivation isn’t perceptible to the driver.