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Showing posts with label Mazda. Show all posts
Showing posts with label Mazda. Show all posts

Monday, 28 November 2011

Mazda announces world first capacitor-based regenerative braking system

Engineerblogger
Nov 28, 2011


Mazda's 'i-ELOOP' regenerative braking system

Mazda Motor Corporation has developed the world's first passenger vehicle regenerative braking system that uses a capacitor. The groundbreaking system, which Mazda calls 'i-ELOOP', will begin to appear in Mazda's vehicles in 2012. In real-world driving conditions with frequent acceleration and braking, 'i-ELOOP' improves fuel economy by approximately 10 percent.

Mazda's regenerative braking system is unique because it uses a capacitor, which is an electrical component that temporarily stores large volumes of electricity. Compared to batteries, capacitors can be charged and discharged rapidly and are resistant to deterioration through prolonged use. 'i-ELOOP' efficiently converts the vehicle's kinetic energy into electricity as it decelerates, and uses the electricity to power the climate control, audio system and numerous other electrical components.

Regenerative braking systems are growing in popularity as a fuel saving technology. They use an electric motor or alternator to generate electricity as the vehicle decelerates, thereby recovering a portion of the vehicle's kinetic energy. Regenerative braking systems in hybrid vehicles generally use a large electric motor and dedicated battery.

Mazda examined automobile accelerating and decelerating mechanisms, and developed a highly efficient regenerative braking system that rapidly recovers a large amount of electricity every time the vehicle decelerates. Unlike hybrids, Mazda's system also avoids the need for a dedicated electric motor and battery.

'i-ELOOP' features a new 12-25V variable voltage alternator, a low-resistance electric double layer capacitor and a DC/DC converter. 'i-ELOOP' starts to recover kinetic energy the moment the driver lifts off the accelerator pedal and the vehicle begins to decelerate. The variable voltage alternator generates electricity at up to 25V for maximum efficiency before sending it to the Electric Double Layer Capacitor (EDLC) for storage. The capacitor, which has been specially developed for use in a vehicle, can be fully charged in seconds. The DC/DC converter steps down the electricity from 25V to 12V before it is distributed directly to the vehicle's electrical components. The system also charges the vehicle battery as necessary. 'i-ELOOP' operates whenever the vehicle decelerates, reducing the need for the engine to burn extra fuel to generate electricity. As a result, in "stop-and-go" driving conditions, fuel economy improves by approximately 10 percent.

The name 'i-ELOOP' is an adaptation of "Intelligent Energy Loop" and represents Mazda's intention to efficiently cycle energy in an intelligent way.

'i-ELOOP' also works in conjunction with Mazda's unique 'i-stop' idling stop technology to extend the period that the engine can be shut off.

Mazda is working to maximize the efficiency of internal combustion engine vehicles with its groundbreaking SKYACTIV TECHNOLOGY. By combining this with i-stop, i-ELOOP and other electric devices that enhance fuel economy by eliminating unnecessary fuel consumption, Mazda is striving to deliver vehicles with excellent environmental performance as well as a Zoom-Zoom ride to all its customers.


Source: Mazda  

Thursday, 30 June 2011

Mazda sees growth with lean gas engines, not EVs

AP
June 30, 2011

Mazda's president believes gasoline engines will still power 80 to 90 percent of the world's autos even in 20 years time, and remains confident it can grow without electric vehicles.

The comments Thursday from Mazda Motor Corp. President Takashi Yamanouchi contrast with the strategy at Japanese rivalNissan Motor Co., which is banking heavily on its Leaf electric car, one of the first mass-produced EVs on the market.

Yamanouchi said Mazda's efficient gas engine called "Skyactiv" will be a pillar of its growth strategy as the Hiroshima-based manufacturer seeks to boost sales in emerging markets, where electric vehicles and hybrids aren't expected to be as popular as in developed nations.

"Skyactiv will be one of the drivers of our growth," Yamanouchi told reporters at a Tokyo hotel, where Mazda showed a new subcompact.

Mazda currently has no hybrid vehicle in its lineup. It plans to start selling a hybrid by 2013.

Hybrids still require gas engines, and Yamanouchi said they can be counted as part of what will be the 80 or 90 percent of cars that aren't electric.

Nissan has sold about 8,000 of its Leaf electric vehicles around the world, more than half in Japan, since its gradual global rollout started in December.

That's a tiny fraction of the world auto market. But Yokohama-based Nissan is targeting production of 250,000 electric vehicles a year globally by 2015, stressing that concerns about global warming and pollution are growing.

Mazda began selling the Demio, known as Mazda2 overseas, in Japan on Thursday, offering a version packed with Skyactiv technology. It is targeting 6,000 overall Demio sales a month.

The automaker said it was not planning to sell the Skyactiv Demio overseas, but was planning the green technology for bigger models.

The Skyactiv Demio gets as much as 30 kilometers a liter (71 miles per gallon), according to Mazda. Other features, such as "idling stop," in which the engine turns off automatically while at a traffic light and other temporary stops, helps boost mileage.

Mazda is building engine and vehicle assembly plants in Mexico for small cars, such as Mazda2 and Mazda3, for markets in Central America and South America.

It has said it will stop building the midsize Mazda6 sedan at its 50-50 joint venture with Ford Motor Co. in Flat Rock, Michigan, but did not specify exactly when that would be, leaving the fate of the plant unclear. Mazda's output there has been at about 40,000 vehicles a year.

Mazda, which has lost money for the last three fiscal years, is struggling to assert its brand without counting on its longtime partnership with Ford.

No replacement partnership has been announced, and Mazda has repeatedly said Ford remains a key partner.

Dearborn-based Ford bought 25 percent of the Japanese carmaker in 1979, raising it to 33.4 percent in 1996. But Ford began cutting ties in 2008, and last year lowered its ownership to 3.5 percent.

Like other Japanese automakers, Mazda has been hurt by supplier disruptions from the March 11 earthquake and tsunami in northeastern Japan. It is also hurt more than others by the surging yen because it sells vehicles made at overseas plants in Japan.

Yamanouchi reiterated the company's target for annual global sales of 1.7 million vehicles by the fiscal year ending March 2016. Mazda sold 1.1 million vehicles for the fiscal year ended March 2011.