What does speed ratio mean?
2 Answers
Automobile speed ratio refers to the transmission ratio of a vehicle. Below are the relevant introductions: Categories: There are two types of transmission ratios in an automobile's drivetrain, namely the speed ratio of the main transmission and the speed ratio of the gearbox. The speed ratio of the main transmission is a fixed value, while the speed ratio of the gearbox varies with the gear used. The speed ratio data for various types of vehicles can be found in the vehicle performance data manual. Extended content: Driving performance refers to acceleration, torque response of the power unit, noise, and vibration. Large-displacement engines provide larger, faster, and smoother torque responses. Front-engine front-wheel drive drivetrains have better torque responses than front-engine rear-wheel drive.
When I first bought a car, I was really curious about what gear ratio meant. After driving more, I finally understood. Simply put, it's the proportional relationship between the rotation of gears. In cars, it mainly refers to the ratio of transmission gears, determining how many times the wheels rotate for each engine revolution. Driving a manual transmission car gave me a deep understanding: a higher gear ratio means the engine works less hard when climbing hills, with strong wheel torque, much like using a lower gear when climbing—steady and powerful. A lower gear ratio is better for high-speed cruising, keeping engine RPM low and saving fuel. But many modern cars have automatic transmissions that adjust the gear ratio on their own, making the ride much smoother. I think understanding this is quite helpful for driving, allowing you to choose the right gear based on road conditions and avoid engine strain and wasted fuel.
