丰田将为2017款致炫搭载新引擎，这台1.5升四缸汽油引擎将替代现行版搭载的1.33升引擎，它将提供更强劲动力和更优异燃油经济性。其功率82千瓦/110马力，比现行版搭载的引擎功率提升9千瓦/12马力，扭矩138牛米。搭载该引擎的致炫能提供“更优异性能和更具乐趣驾驶感受”，在新欧洲驾驶循环（NEDC）测试中油耗降低12%。致炫1.5百公里加速时间11秒，比致炫1.33快0.8秒。新引擎可以从奥托循环转成阿特金森循环，“以便在不同驾驶条件下进一步优化燃油经济性”，其热效率提升38.5%，“达到同级车最佳水平”。毋庸置疑，这台1.5升引擎得益于丰田的VVT-iE技术——可变进气阀正时系统。其最新版本应用了电控进气门和排气凸轮轴液压控制相位移动。

 

Toyota Yaris upgraded with new more powerful 1.5-liter petrol engine

For the 2017 Yaris, the automaker decided that a new engine would be fitting. The 1.5-liter petrol engine is effectively replacing the 1.33-liter unit from the current lineup, offering more power and higher efficiency. With 110 hp (82 Kw), it is has 12 hp (9 kW) more and also a higher torque peak at 101 pound-feet (138 Newton meters). The motor will deliver “better performance and a more enjoyable drive,” while at the same time achieving a reduction of up to 12 percent in fuel consumption, under the current NEDC official test criteria.

 

The Yaris 1.5 will need 11.0 seconds to cover the 0-62 miles per hour (0-100 kilometers per hour) sprint – 0.8 seconds faster than the Yaris 1.33 it replaces. The new engine can switch from the Otto to the Atkinson cycle to “gain optimum efficiency in different driving conditions,” which results in 38.5 percent thermal efficiency value, “among the best on the market.”

 

Needless to say, the 1.5-liter unit also benefits from Toyota’s VVT-iE technology, a variable inlet valve timing system. In its newest version, it uses electronically controlled intake valve and hydraulically controlled phase shift of the exhaust camshaft.