08
2016
12

New Camry the world's highest thermal efficiency engine what?


  [car03 engine]  Although there are 19 days away from Christmas yesterday, but Toyota has suddenly brought a gift for the world. Has always been to product cost-effective and stability of the top-ranking them released the new 2.5L inline four-cylinder engine, shocking is its maximum thermal efficiency reached 41%, which once again refresh the Toyota in the fourth generation Prius on the use of combustion Efficiency 40% of the 2ZR-FXE engine, it once again stand on the world's production car thermal efficiency peak.

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  Similar to Honda's Earth Dreams Technology and Mazda's SKYACTIV series of engines, this engine, which creates the highest thermal efficiency, is part of Toyota's new engine portfolio, powered by Toyota's new chassis development architecture, the TNGA (Toyota New Global Architecture) Dynamic Force Engine. According to overseas media news, the United States will soon replace the Camry and European-related models will be equipped with this engine.

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  Previously, the attempt to use high-fuel-efficient engine production cars mixed vehicle occupies most of the country, in order to pursue high fuel efficiency, most of them using the Atkinson cycle, for internal combustion engine low-torque problem, many models choose to use the motor To make up. The Toyota engine in the future will be equipped with gasoline and mixed two models, this is undoubtedly a huge challenge.

Thermal efficiency is what? Why worthy of Toyota pride?

    The term thermal efficiency may sound boring, and the rigorous explanation in textbooks is the ratio of kinetic energy per unit volume of fuel to energy. For our ordinary consumers, it can be understood that the higher the ratio the more powerful engine, while fuel consumption, lower emissions.

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  For the internal combustion engine, the energy loss is inevitable, the engineer's goal is to try to minimize the loss of energy. Specific to the gasoline engine, said, is to do work in the trip as far as possible within the fuel can be converted into kinetic energy efficiency. Its improvement to reduce fuel consumption, emissions have a positive effect. From the data point of view, although the torque value of this Toyota engine slightly lower than the Mazda SKYACTIV Genesis blue sky series engine, but the power is very clear on the lead. In addition, only from the numerical comparison, Toyota this 2.5L four-cylinder engine has been more than many years ago, BMW, Mercedes-Benz similar displacement engine is more outstanding.

How did Toyota do it?

    So, Toyota engineers in the end by what method will this engine thermal efficiency to 41%? Here we will open the Toyota by the very limited information a clue, but the data display angle and the effect is poor, please forgive me.

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  Inlet near the cylinder head shape to slightly upturned and the purpose of optimizing the valve angle is very simple, is to help the intake air flow in the combustion chamber to form a better rolling to facilitate fuel and air mixing, which is to enhance the combustion efficiency One of the keys.

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  Valve, the 2.5L naturally aspirated engine using the inlet and exhaust valve double variable timing technology, and in the intake side, which uses the VVT-ie, that is, the electronic control variable valve timing technology . Compared to the exhaust side of the hydraulic control, the electronic control system faster response, control accuracy is also higher.

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  In addition to the engine section, Toyota engineers also match the engine with a new gearbox, the future use of this engine will be equipped with 8-speed automatic front-wheel drive automatic transmission, after the drive will be with 10-speed automatic transmission. The official data show that, compared with the original love letter 6-speed automatic transmission, the new gearbox loss reduced by about 50%.

Full text summary:

    In Europe and the United States car prices desperately promoting new energy vehicles, Toyota, Honda, Nissan, Mazda these Japanese brands in the past two years but focused on upgrading the traditional engine thermal efficiency. Calculate the value of carbon emissions, at this stage most of the pure electric and plug-in hybrid models and enhance the thermal efficiency of conventional internal combustion engine after the comparison is not an advantage, so the last two years we saw several Japanese car prices desperately improve fuel efficiency, There will be a fuel-efficient Toyota yesterday announced 41% of the new engine. Of course, other car companies will not let the Toyota a dominance, Mazda hands clutching the use of compression-ignition gasoline engine second-generation blue sky, good technical breakthroughs in the Honda technical research hiding HLSI, they are not good crop , This play has just begun.


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