The 2.5L naturally aspirated engine on the Asian Dragon twin is the latest generation of Toyota's Dynamic Force series under the TNGA architecture. Asia Dragon 2.5L 8AT fuel version of the model, 100 km fuel consumption is only 6.2L, A B-class flagship model fuel consumption almost reached the level of the mainstream A-class family sedan, the strength can be seen.
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The 2.5L engine on the Asian Dragon twin is more advanced than the fuel version. The two key indicators of thermal efficiency and compression ratio, Toyota is now the world's top, the Asian Dragon fuel version 2.5L thermal efficiency 40%, compression ratio 13:1, while the dual engine version thermal efficiency 41%, compression ratio 14:1.
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Do not underestimate this 1% difference, internal combustion engine technology is very mature, every step of progress needs to be improved in all aspects of materials, design, process.
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The two-engine 2.5L engine of Asia Dragon adopts the dual injection system composed of direct injection in manifold injection cylinder, which can realize stratified combustion under low load. The intake end adopts VT-IE (electronically controlled variable valve timing) system to achieve more accurate and rapid intake control; The Angle of the engine inlet and exhaust valves is increased from about 31° to about 41°, and the valve base adopts laser cladding technology to make the engine inlet and exhaust more smooth; The piston, piston connecting rod and other moving parts are treated with light weight to reduce the motion inertia and improve the response of the engine.
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It is these seemingly invisible \"micro-innovations\" that come together to achieve the efficient power of the engine. In actual driving, the Asian Dragon dual-engine version to achieve the maximum power and maximum torque of the engine speed, are much lower than the fuel version, such as to achieve the maximum power, the fuel version to 6600rpm, while the dual-engine version as long as 5700rpm, so that the driving experience is better.