What does the tail "d4t" of Toyota Corolla mean?

1. The tail D4-T of Toyota Corolla refers to 1.2T engine, 20 17 1.2T Corolla D4 refers to in-line 4-cylinder engine, and T refers to turbine.

Second, the engine features:

1. Toyota added a water-cooled intercooler to this engine, which can be cooled politely before compression, improve oxygen content, reduce turbine lag, make the engine work in the best condition and improve service life.

2. The engine warms up the system in advance to reduce the warm-up time of cold start, reduce the wear of the engine caused by cold start and reduce fuel consumption.

3. The piston oil electronic control single system technology can reduce the fuel injection to the piston during cold start, make the engine temperature rise rapidly, reach the working state in the shortest time, and reduce fuel consumption.

4. Double-cycle mode: during low-gear driving, the engine switches to Atkinson cycle mode, reducing fuel injection and piston compression ratio, and automatically switches to Alto cycle mode at high engine speed, resulting in large piston compression ratio and large fuel injection.

Extended data:

As for intercooler, Corolla 1.2T has a relatively rare water-cooled intercooler design. Compared with the traditional air-cooled intercooler, the water-cooled intercooler has high cooling efficiency, good effect and short time, which is beneficial to improve the response sensitivity of the turbine.

In addition, water-cooling intercooling can cool the air compressed by the turbocharger, prevent the reduction of oxygen content in the air, and ensure the durability and reliability of the engine to the greatest extent.

This 1.2T engine can switch between Otto cycle and Atkinson cycle, and adopts Toyota dual VVT-iW variable valve timing technology, in-cylinder direct injection technology and water-cooled intercooler technology.

The low inertia supercharger can improve the thermal efficiency of the engine by optimizing the shapes of turbine blades and shells, and the water-cooled intercooler located above the intake manifold can also cool the charged air more effectively.

References:

Baidu Encyclopedia-Corolla Power Configuration