# What is torque ratio?

## What is torque ratio?

A gear train can be analyzed using the principle of virtual work to show that its torque ratio, which is the ratio of its output torque to its input torque, is equal to the gear ratio, or speed ratio, of the gear train.

What is the best gear ratio for torque?

A 4.30 ratio will give you better low end acceleration but also lower gas mileage. A 3.73 ratio will still provide decent acceleration but will also provide a tad better mileage plus give you a higher top end speed.

### Is torque proportional to gear ratio?

The rotary machine’s output torque is increased by multiplying the torque by the gear ratio, less some efficiency losses. While in many applications gear reduction reduces speed and increases torque, in other applications gear reduction is used to increase speed and reduce torque.

Do larger gears produce more torque?

The associated torque is quantified by multiplying the circumferential component by the radius; larger gears experience a greater amount of torque, whereas smaller gears experience less torque. Similarly, the torque ratio is equal to the ratio of the gears’ radii.

#### Do lower gears have more torque?

Within the capability limits of the engine, shifting into a lower gear allows the engine to turn faster, allowing it to produce more power which the transmission converts into greater output torque for a given wheel speed.

How to calculate the torque of a transmission?

The output torque from a transmission with input torque 500 Nm, gear transmission ratio 3.8 and gear efficiency 0.9 – can be calculated as Mo = (500 Nm) (3.8) (0.9) The output speed of a transmission with input speed 2000 rpm and transmission ratio 3.8 can be calculated as So = (2000 rpm) / (3.8)

## Why is the ratio of gears to torque important?

Gears are useful for multiplying or dividing torque, whether the gears mesh directly or through a belt or chain; the ratio of the size of the gears determines whether they increase or decrease torque.

How to calculate transmission ratio for 2000 rpm?

The output speed of a transmission with input speed 2000 rpm and transmission ratio 3.8 can be calculated as So = (2000 rpm) / (3.8) = 526 rpm

### How to calculate the gear efficiency of a transmission?

The output torque from a transmission with input torque 500 Nm, gear transmission ratio 3.8 and gear efficiency 0.9 – can be calculated as Mo = (500 Nm) (3.8) (0.9) The output speed of a transmission with input speed 2000 rpm and transmission ratio 3.8 can be calculated as