AUTOTECH Kerala

WATER / LIQUID COOLING SYSTEM  In water cooling system, water is continuously circulated through passage (water jackets) around the cylinder. The heat removal from the cylinder is effected by transfer of heat to circulating water. This system is more effective than air cooling and is used for the engines having large capacity. It is used in light and heavy vehicles such as bus, lorry, trucks etc...the inlet water should be about 85-90°C and outlet water is about 95°C -105°C. Types of water cooling system According to the method of circulation of water, this system is classified as a. Thermosyphon system (or) Gravity circulation system. b. Pump circulation system (or) Forced circulation system. ♦️  THERMOSYPHON SYSTEM Figure shows the arrangement of thermosyphon cooling system. Generally it consists of radiator, radiator tubes, cylinder water jacket, filler cap, drain tap, fan etc... In this method water circulation is achieved due to difference between the density of hot w

CONSTRUCTION The master cylinder is so-called 'heart' of the hydraulic brake system. It has two chambers, a reservoir and a compression chamber. Other important parts are the piston, return spring, rubber seals, and check valve (one way valve) push rod. WORKING When the brake pedal is pressed, the push rod moves the piston forward. When the piston passes the bypass port, the fluid inside the compression chamber is compressed and the check valve is opened and pumped into the wheel cylinders. When the pedal is released, the piston moves backwards with the help of the return spring. However, since the check valve is closed for a few seconds, the pumped fluid cannot return to the compression chamber. This is due to the inertia of the brake fluid and the pressure of the compression spring. This results in a vacuum in the compression chamber, which deflects the primary seal inwards and transports the fluid from the rear of the piston to the compression chamber through the pis

Construction and working of a constant mesh gear box Constant  gear mesh gearbox employed helical gears for power transmission. The gears are rigidly fixed in the lay shaft. The gears in output shaft rotates freely without engaging with shaft, thus not transmitting power. The gears in both shafts are always meshed together. To engage the gears with output shaft dog clutch is used. the dog clutch is shifted by the seletor fork moved by gear lever. To provide reverse gearing a idler gear is used.  When the gear lever is pushed, the gear selector fork pushes the dog clutch.  The dog clutch engages the gear and the output shaft, thus power from lay shaft now transmitted to output shaft.