Mazda has adopted a long-term vision for technology development called "Sustainable Zoom-Zoom" and is working to help achieve a sustainable future.
Mazda announced its long-term vision for technology development "Sustainable Zoom-Zoom" in March 2007. The basic policy of the vision is to "provide all customers who purchase Mazda vehicles with driving pleasure as well as outstanding environmental and safety performance." This vision commits Mazda to making vehicles that always excite and that embody a "Zoom-Zoom" feeling, meaning they look inviting to drive, are fun to drive and make you want to drive them again, helping to achieve an exciting, sustainable future for vehicles, people, and the Earth.
"The Zoom-Zoom tree" embodies the Zoom-Zoom concept and its spread throughout society. The tree absorbs the "ONE MAZDA" corporate culture as nutrients through firmly planted roots. As it continues to grow, the left branch represents the environment, the right branch represents safety, and the treetop embodies the Zoom-Zoom concept.
As vehicle ownership continues to expand around the world, automobile manufacturers must redouble their efforts to achieve cleaner exhaust emissions, and improve fuel economy in order to cut CO2 emissions and help reduce the world's dependence on increasingly scarce fossil fuels. Mazda considers it necessary to develop a multi-solution approach to automobile-related environmental issues that takes into account various factors such as regional characteristics, vehicle characteristics and types of fuel.
Mazda has set a goal of raising the average fuel economy of Mazda vehicles sold worldwide by 2015 by 30% compared with 2008 levels. Based on the Sustainable Zoom-Zoom long-term vision for technology, Mazda cuts CO2 emissions through improved fuel economy and provides all customers who purchase Mazda vehicles with driving pleasure and outstanding environmental and safety performance.
Mazda adopts the Building-Block Strategy to realize its goal of raising the average fuel economy of Mazda vehicles sold worldwide by 2015 by 30% compared with 2008 levels. Even in 2020, Mazda expects that the world's key energy sources will continue to be mainly petroleum-based and that the majority of vehicles will still be powered by internal combustion engines. Consequently, Mazda's Building-Block Strategy prioritizes improvements in base technologies such as improving the engine's thermal efficiency and reducing the weight of the vehicle body. The next step of the Building-Block Strategy is the gradual introduction of electric devices such as idle-stop, brake energy regeneration, and hybrid powertrains. This approach to reducing total CO2 emissions does not rely heavily on a small proportion of specific eco-friendly models. Rather, Mazda aims to deliver vehicles with excellent environmental and safety performance at an affordable price to customers worldwide, including emerging countries, which may lack special infrastructure.
Graphic representation of global market share of powertrain technologies
Based on the Building-Block Strategy, base technologies and electric device technologies are combined in the following three steps.
The i-stop system automatically shuts the engine off temporarily when the vehicle comes to a standstill. The use of i-stop alone can improve fuel economy by 7% to 10% (as measured in Japanese models). Mazda installed i-stop in the upgraded Axela/Mazda3 in 2009 and has been expanding it to other models. In February 2012, i-stop was installed in the CX-5 equipped with the SKYACTIV-D 2.2 clean diesel engine, marking the first use of an idling stop system in a diesel engine passenger car in Japan.
Mazda has developed the world's first brake energy regeneration system for a passenger vehicle that uses a capacitor as an electricity storage device*4. It is the groundbreaking system, which Mazda calls 'i-ELOOP'. As the vehicle decelerates, the system converts kinetic energy into electricity, which can be used later as needed. i-ELOOP is particularly effective in improving fuel economy in real-world driving situations with frequent acceleration and braking.This system has been introduced with the Atenza/Mazda6, launched in 2012, and the new Axela/Mazda3, launched around the globe from autumn 2013.
Brake Energy Regeneration System "i-ELOOP"
Vehicles require electricity to power variety of electrical components such as headlamps, air-conditioner and audio equipment. Electricity is generated by using engine power to turn a power generator called an alternator.
Approximately 10% of engine output is said to be used not for driving, but to generate electricity to power the electrical components.
The goal in developing i-ELOOP was to eliminate the need for the engine to generate electricity.
- *4Energy storage device that charges and discharges electricity on the electric double-layer principle without involving a chemical reaction.
This type of system improves overall energy efficiency using an electric motor to assist gasoline engines at times when energy efficiency is low, such as when a vehicle is running at low engine speeds or during low-load operation. This system ensures an outstanding fuel economy performance by mainly using an electric motor when the vehicle is started, by efficiently combining the use of a gasoline engine and an electric motor during driving at a regular speed and during acceleration, and by using the electric motor as a power generator during deceleration to convert brake energy to electricity, which can be used later as needed. The new Axela/Mazda3 (overseas) was the first model to incorporate this SKYACTIVE-HYBRID system.