Constant Mesh Gear Box vs. Synchromesh Gear Box

This blog post discusses the two types of gear boxes used in automobiles: constant mesh gear boxes and synchromesh gear boxes.

Constant mesh gear boxes are simpler and less expensive to manufacture, but they require double declutching to change gears smoothly. Synchromesh gear boxes are more complex and expensive, but they do not require double declutching, making them more convenient to use.

Questions

• What is a constant mesh gear box?
• How does a synchromesh gear box work?
• What is double declutching?

Answers

• A constant mesh gear box is a type of gear box in which all of the gears are in constant mesh with each other. This means that the gears are always rotating, even when they are not engaged.
• A synchromesh gear box is a type of gear box that uses synchronizers to match the speeds of the gears before they are engaged. This eliminates the need for double declutching, making it more convenient to use.
• Double declutching is a technique used to change gears smoothly in a constant mesh gear box. It involves disengaging the clutch, placing the gear lever in neutral, reengaging the clutch, and then engaging the desired gear.