Manual Transmission of Car

Introduction

A manual transmission is a type of transmission used in motor vehicle applications. It uses a driver-operated clutch engaged and disengaged by a foot pedal (automobile) or hand lever (motorcycle), for regulating torque transfer from the engine to the transmission; and a gear selector operated by hand (automobile) or by foot (motorcycle).

Key Components of a manual transmission are given below

ü  Gear Selector fork

ü  Input Shaft

ü  Output shaft

ü  Counter Shaft

ü  Synchronizer Assembly

ü  Reverse Idle Shaft

                                                                     Figure 1: Working of Manual Transmission

Working

In the ETL, I understand how manual transmission works and what are the basics ideas behind it. The input shaft comes from the engine through the clutch. On this shaft, a gear is mounted and both of them act as a single unit. Counter Shaft is also connected as a single unit. So all, the gears on counter shaft spin as one unit. The input shaft and countershaft are directly connected to each other through their meshed gears. In this way, the countershaft extracts its power directly from the engine through input shaft. The output shaft is the splined shaft that is connected to the countershaft. Power is transmitted to the wheels from the output shaft. If the wheels are rotating then output shaft must be rotating.

Contemporary automobile manual transmissions typically use four to six forward gear ratios and one reverse gear, although consumer automobile manual transmissions have been built with as few as two and as many as seven gears. Transmissions for heavy trucks and other heavy vehicles more often than not have 8 to 25 outfits so the transmission can offer both an extensive variety of riggings and close apparatus proportions to keep the motor running in the power band. Working previously mentioned transmissions regularly utilize a similar example of shifter development with a solitary or numerous changes to connect with the following grouping of rigging determination.

Synchronizer

A synchronizer purpose is to eliminate the need for double clutching and allow the collar and the gear to make frictional contact before the dog contact makes contact. This lets the collar and gear synchronizer their speed before the teeth engage.

The cone-like shape of the gear fits into the cone-shaped area in collar and friction between the cone and the collar synchronize the collar and the gear.

Reverse Gear

Reverse gear is controlled by a small idle gear which is mounted on the reverse idle shaft. The countershaft rotates idle gear, then this idle gear rotates one gear at output shaft which rotates reverse than all other gears.