Does a Larger or Smaller Gear Ratio Save More Fuel?

1 Answers
DiMicah
07/29/25 4:01pm
Smaller gear ratios save more fuel. Below is an introduction to gear ratios: 1. Definition of Gear Ratio: It refers to the gear transmission ratio of the main reducer in a vehicle's drive axle, which is equal to the rotational angular velocity of the drive shaft divided by the rotational angular velocity of the axle half-shaft, or the ratio of rotational speeds. When other speed control methods are used for the motor, such as variable frequency speed control or slip speed control, the ratio of the motor's maximum speed to its minimum speed is also called the gear ratio, indicating the range of speed control. 2. Dual Gear Ratio: Under no-load conditions, a smaller gear ratio is used to save fuel and extend the vehicle's service life. The development of dual gear ratio heavy-duty trucks will be one of the future directions for heavy-duty truck development.
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