Is it good or bad for a car to frequently drive on highways?
1 Answers
Driving on highways for extended periods is beneficial for the engine. The engine consistently operates at a relatively high RPM with optimal fuel efficiency, high combustion efficiency, and an ideal air-fuel ratio, which helps reduce carbon deposit formation. This is advantageous for emissions and lubrication, as well as prolonging the lifespan of the engine and transmission. When a car cruises at 120 km/h on the highway: Typically, the engine RPM ranges between 1600 and 3500. Smaller displacement engines tend to run at higher RPMs, while larger displacement engines operate at lower RPMs. Within this RPM range, the engine achieves the highest fuel efficiency ratio. The engine operates under closed-loop control, using an oxygen sensor to monitor the oxygen content in the exhaust. The engine's ECU adjusts the fuel injection based on the oxygen level to maintain the air-fuel ratio around 14.7:1, achieving optimal combustion and minimizing carbon deposits. During high-speed driving: Since the car is moving at high speed, sufficient air intake through the front ensures effective cooling. The engine can continuously operate under ideal conditions with good cooling, optimal lubrication, and the best air-fuel ratio, which is beneficial for extending the engine's service life.
