
Currently, employs the second-generation Skyactiv engine, which utilizes HCCI (Homogeneous Charge Compression Ignition) combustion technology. This technology abandons the traditional spark plug ignition method and instead adopts a compression ignition approach for the air-fuel mixture, achieving a compression ratio of 18:1. Compared to the non-Skyactiv engines of 2008, the current Skyactiv engines have improved fuel efficiency by 30%, while the second-generation Skyactiv engines have enhanced fuel efficiency by 50%. The new generation engines have reduced fuel consumption to 3.3L/100km. Some of the models include: 1. Mazda6: The Mazda6 (known as "Atenza" by FAW Car) is a mid-size sedan product globally launched by Mazda since 2003, replacing the Mazda626 and Millenia models, primarily targeting the sporty mid-size car market. The current third-generation Mazda6 debuted at the Moscow Auto Show in April 2012 and was introduced to China through imports by FAW Car in 2014. In 2015, the third-generation Mazda6 was locally produced by Changchun FAW Car under the name Mazda6 Atenza. 2. CX-5: The CX-5 is a compact sport utility vehicle (SUV) product globally launched by Mazda since 2012. The current second-generation CX-5 debuted at the Los Angeles Auto Show in November 2016, featuring comprehensive improvements over the first generation in terms of exterior and interior design. Its main competitors are the Honda CR-V and Toyota RAV4. In September 2017, Changan Mazda introduced the locally produced second-generation Mazda CX-5.

I've been driving my Mazda3 for several years, which is equipped with the SKYACTIV-G engine. Mine is the 2.0-liter version. This engine is really , with a high compression ratio of 13:1, yet it runs perfectly on regular gasoline. The acceleration is very linear, unlike turbocharged cars that can suddenly surge forward. The fuel consumption is pleasantly surprising too, around 6L/100km in city driving and just about 5L/100km on highways. Once at a repair shop, the mechanic praised this engine for its low internal friction and lightweight components. I heard the new SKYACTIV-X is even more impressive, achieving diesel-like compression ignition with gasoline and reaching 40% thermal efficiency. Mazda really puts thought into their engines, sticking to the naturally aspirated route instead of going for turbocharging.

Those who have studied Mazda's engine technology know that their flagship is the SKYACTIV series. This includes the SKYACTIV-G gasoline engine and SKYACTIV-D diesel engine, with the latest being the SKYACTIV-X compression-ignition engine. This compression-ignition technology is quite impressive – the spark plug controls the compression ignition point, reducing fuel consumption by 20-30%. Mazda's engine design philosophy is unique, increasing the compression ratio without adding a turbocharger, instead using an ultra-high-precision direct injection system. They've also put effort into materials, reducing the crankshaft weight by 15% and applying special coatings to pistons to decrease friction. In the future, they plan to introduce an inline six-cylinder engine mounted on a rear-wheel-drive platform. The SKYACTIV technology is actually a systematic project, with the engine paired with a highly efficient 6AT transmission.

As an environmental advocate, I appreciate Mazda's green innovations in engine technology. Their main focus is the SKYACTIV series, with the core principle of improving thermal efficiency to reduce emissions. Rather than aggressively shifting to electrification, they optimize internal combustion engines. The latest SKYACTIV-X achieves lean combustion, reducing carbon emissions by 30%. It adopts a unique combustion method that's particularly fuel-efficient during idle conditions. considers the entire lifecycle environmental impact, using recycled materials for many engine components. The CX-60 hybrid uses a 2.5L engine as its base, paired with an electric motor. This approach demonstrates there's still untapped potential in traditional engines, making it highly practical for resource-constrained regions.

To discuss Mazda's engines, we must start with history. In the early years, the rotary engine was their signature, used in the RX series sports cars. Today, the focus is on SKYACTIV technology, which has evolved through three generations since its introduction in 2011. The first generation, SKYACTIV-G, addressed the issue of high compression ratio anti-knock; the second generation optimized the combustion chamber shape; and the third generation, SKYACTIV-X, incorporated compression ignition technology. In 2018, revived the rotary engine, but as a range extender for the MX-30 electric vehicle. Mazda's engines embody a unique design philosophy, with their high-compression naturally aspirated approach standing out. Future priorities include inline six-cylinder engines and plans for a hydrogen-powered rotary engine. Mazda insists on longitudinal engine placement to benefit weight distribution and balance.

Those interested in should pay attention to the engine configurations across different models. The Mazda2 comes with a 1.5L Skyactiv engine; the Mazda3 offers options of 1.5L, 2.0L, and 2.5L gasoline engines, with some markets featuring a compression ignition version; the CX-5 provides either a 2.0L or 2.5L engine; the new flagship CX-90 uses a 3.3-liter six-cylinder turbocharged engine with mild hybrid technology. When choosing a car, note: the 2.0L is suitable for daily commuting with low fuel consumption and maintenance costs; the compression ignition version offers significant power improvement but at a higher price; the six-cylinder engine is ideal for frequent long-distance travel. Having driven a friend's car with a Skyactiv engine, the most noticeable feature is its quick response—stepping hard on the accelerator results in crisp downshifts and stable acceleration through corners.


