What is the gauge on the left side of the car dashboard?
2 Answers
Generally, the left gauge on a car dashboard is the tachometer. The positions of the gauges vary among different cars, but the two main gauges on a car dashboard are the tachometer and the speedometer/odometer. Tachometer: Typically displayed symmetrically with the odometer, it serves as a window for understanding the engine's working condition. The indicated number multiplied by 1000 or 100 represents the engine's revolutions per minute (RPM). The tachometer is usually divided into several zones marked in white, red, or green, representing safe RPM, dangerous RPM, or the most economical RPM range, respectively. Drivers only need to ensure the RPM does not enter the red danger zone. Of course, it's important to match the RPM with the current gear to avoid damaging the vehicle. Speedometer/Odometer: This gauge consists of two parts: the 'speedometer,' which indicates the vehicle's speed, and the 'odometer,' which records the distance traveled. The former informs the driver of the vehicle's speed, aiding in speed control and ensuring driving safety; the latter displays the vehicle's mileage, reminding the driver of maintenance and service needs. Traditional mechanical speedometers were common in the past, but they are increasingly being replaced by electronic ones. The odometer also follows this trend, though its readings are preserved even when the vehicle is powered off. In addition to these, the dashboard may also display a coolant temperature gauge and a fuel gauge: Coolant Temperature Gauge: It actually shows the temperature of the antifreeze, typically ranging between 0-130 degrees. After starting the car, the coolant temperature rises and stabilizes at the middle range, indicating the vehicle is ready to move. Fuel Gauge: This is a crucial indicator for drivers to determine when to refuel. When the needle points to 'E,' it means the vehicle needs fuel, and when it points to 'F,' the tank is full.
I've been driving for almost thirty years, and the gauge on the left side of the dashboard is usually the tachometer, specifically showing how many revolutions the engine makes per minute, with the unit called RPM. This gauge is most useful in manual transmission cars, helping you master the timing of gear shifts—for example, keeping the RPM between 2000 and 3000 when going uphill to avoid engine idling or stalling, protecting the car's heart from excessive wear. It's equally important in automatic transmission models, allowing you to monitor the engine's condition. If the RPM consistently runs high, it might indicate incomplete brake release or heavy air conditioning load, reminding you to save fuel and schedule maintenance sooner. When I was younger, I once experienced a sudden RPM surge on the highway, which turned out to be clutch slippage—luckily, the gauge alerted me in time for repairs, preventing an accident. I’ve developed a habit of glancing at it while driving, along with the speedometer on the right and the fuel gauge in the middle, ensuring comprehensive driving safety.
