Make fuel-efficient to the extreme! Detailed explanation of Toyota 2.5L self-priming four-cylinder engine

Speaking of it, everyone’s first reaction is durability, followed by fuel economy. Once again, the "big killer" was sacrificed. The brand-new 2.5L has a thermal efficiency of 40%. If it is matched with the hybrid system, the thermal efficiency will reach 41%. Let’s talk about this 5ARFE2.5L self-priming four cylinder!

Technical parameters: The maximum output of the 2.5L four-cylinder reaches 135kW, which is 10% higher than that of the previous generation 2.4L, and it breaks through the practice that the output is always too conservative. Its torque is 180, reaching 6000rpm, the peak torque is 234 Nm, and the maximum torque speed is 4100rpm.

Advanced technology: 1. The difficulty of new casting technology will be much higher than before, and black technology and laser cladding technology have to be introduced. To put it simply, with the help of this technology, the wear resistance and heat resistance of the cylinder block will become stronger.

2. Changed and. 2AR is 90mm×98mm, but it has been slightly lengthened, which is 87.5 mm× 103.4 mm.. /ratio is about 1.2. Various specifications such as valve angle and/or ratio will also be used as a framework for others.

3. This one adopts manifold injection and in-cylinder direct injection dual injection system. Under low load, the dual injection system can realize stratified combustion, improve thermal efficiency, and provide good dynamic response under high load. At the same time, electronic control is adopted, which can realize more accurate and rapid air intake control. In the aspect of timing adjustment, VVT-iE (electronically controlled variable timing) system is adopted at the intake end of 2.5L direct injection. Compared with traditional hydraulic control, electronically controlled control has faster adjustment speed and wider working range.

The article is provided by the author.