New Technology in Diesel Engines (1)
Cumbersome, noisy, and spraying black smoke, many people have a bad impression of diesel engines. After years of research and application of new technologies, the status quo of modern diesel engines is incomparable to the past. Modern diesel engines generally use technologies such as electronically controlled injection, common rail, and turbocharged intercooling. Significant breakthroughs have been made in terms of weight, noise, and smoke, reaching the level of gasoline engines.
1. Electronically controlled injection technology
The main difference between a diesel engine and a gasoline engine in terms of electronically controlled injection is that the electronically controlled injection system of a gasoline engine only controls the air-fuel ratio (the ratio of gasoline to air), while the electronically controlled injection system of a diesel engine adjusts the load by controlling the injection time. .
The diesel electronically controlled injection system consists of three parts: sensor, ECU (control unit) and actuator. Its task is to electronically control the fuel injection system to realize real-time control of fuel injection quantity and fuel injection timing with operating conditions. Using sensors such as speed, temperature, pressure, etc., the parameters detected in real time are synchronously input into the computer, and compared with the parameter values stored in the ECU. achieve the best.
To make load regulation more precise, common rail technology was created. Diesel turbochargers have already been introduced. As for the supercharged intercooling technology, when the turbocharger compresses the fresh air, it is cooled by the intermediate cooler, and then flows to the cylinder combustion chamber through the intake manifold and intake valve. Effective intercooling technology can reduce the supercharging temperature to below 50 ℃, which helps to reduce exhaust emissions and improve fuel economy.
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