How is the matching between car gears and speed?
2 Answers
Car gear and speed matching involves starting in first gear, shifting to second gear at around 10 km/h, third gear at 20 km/h, fourth gear at 45 km/h, and fifth gear at 60 km/h. When the speed corresponds to the gear, the car's operating performance is at its best, and the thermal efficiency of the fuel is highest. If the speed does not match the gear, such as high speed with low gear or low speed with high gear, it not only increases fuel consumption but also causes damage to the engine and transmission, leading to irreversible harm to the vehicle. Therefore, it is essential to maintain the appropriate gear and speed matching while driving. Notes on gear shifting: For beginners, in addition to mastering the timing of gear shifting as quickly as possible, it is also necessary to learn the hand gestures for shifting. When shifting gears, keep the five fingers together, lightly grip the gear knob, and use the forearm to guide the hand in shifting. Be gentle and slow when shifting, avoiding excessive force to prevent shifting into the wrong gear. Always pause in neutral before shifting, and if you shift into the wrong gear, don’t panic—simply return to the original gear and shift again. Introduction to automatic transmission gears: Automatic transmission gears include P (Park), R (Reverse), N (Neutral), D (Drive), and B (Brake). P is for parking and is used for long-term parking, R is for reversing, N is neutral and used for short stops like at traffic lights, D is the automatic driving gear where the computer shifts gears automatically, and B is the braking gear.
I've been driving to and from work for several years, and gear matching mainly depends on feel and speed. When starting, the car is very slow, so I stay in first gear, then shift to second gear for acceleration when the speed reaches around 10 to 20 km/h. When the speed increases to 20 to 40 km/h, I shift to third gear, which makes the drive smoother and prevents the engine from being too loud or roaring, while also avoiding high RPMs that waste fuel. On highways, when the speed exceeds 60 km/h, I usually cruise in fourth or fifth gear, keeping the RPM around 2000—this is both fuel-efficient and smooth. Remember not to use a high gear at low speeds, as the car may shake and stall easily; also, avoid low gears at high speeds, as the engine will roar and consume more fuel. Adjust gears according to road conditions, such as downshifting for extra power when going uphill or upshifting slightly to control speed when going downhill. Over time, you’ll develop a natural feel for it and won’t need to constantly check the dashboard.
