How do you prevent crankcase explosion?

Preventive measure of crankcase explosion

1. There should be adequate cooling of the engine.
2. Proper purification and analysis of lube oil.
3. Lube oil filter to be changed over & cleaned as per schedule.
4. Ensure proper cylinder lubrication by checking the condition of piston, piston rings and liner through scavenge ports.

1. What causes a crankcase explosion?
2. What do you do after a crankcase explosion?
3. What are the crankcase safety devices?
4. What safety equipment is installed in the crankshaft to prevent explosion?
5. In which of the following engines crankcase explosion occurs?
6. Is the crankcase where you add oil?
7. What is crankcase relief valve?
8. What stroke in which the explosion takes place and the piston is pushed downwards?
9. What is crankcase door explosion release valve?
10. What is primary and secondary crankcase explosion?
11. What is a crankcase and what does it do?
12. What causes oil mist in crankcase?
13. What is crankcase pressure sensor?
14. How does an engine trap the explosion of air and fuel?

What causes a crankcase explosion?

A crankcase explosion is caused by ignition of oil mist, itself created by the presence of a hot spot, which led to the evaporation of lubricating oil and its condensation into an oil mist. Its consequences can be severe, including death and serious injury to personnel and extensive damage to the engine.

What do you do after a crankcase explosion?

What will be your action after detecting a hot spot ? Keep clear off crankcase relief door to prevent personnel injury, keep fire extinguisher ready and open skylight. Inform bridge, stop engine, open indicator cocks, engage turning gear and turn engine with lube oil circulation continuing to prevent engine seizure.

What are the crankcase safety devices?

Crankcase Safety Devices. There are various safety devices such as the crankcase exhaust fan, relief valve, bearing temperature sensor, breather pipe, oil mist detector, lube oil temperature sensor, and alarm. Together they play an active role in the safety and protection of the main engine from the crankcase explosion ...

What safety equipment is installed in the crankshaft to prevent explosion?

1 .

Each stroke is accomplished in half a revolution of the crankshaft. As a practical safeguard against explosions which occur in a crankcase, explosion relief valves or doors are fitted. These valves serve to relieve excessive crankcase pressures and stop flames being emitted from the crankcase.

In which of the following engines crankcase explosion occurs?

Crankcase explosion in I.C. engines usually occurs as First a mild explosion followed by a bi explosion. Crankcase explosions are also the result of high operating temperatures of the engine. The main cause of crankcase explosions are the development of hot spots at various places in the crankcase.

Is the crankcase where you add oil?

You, or your mechanic, add oil to an engine to the crankcase via the cap labeled “Oil” under the hood. The oil settles in the oil pan when the engine is not running. ... The result is a foamy, frothy substance that cannot properly lubricate the engine. Think of this as your engine's way of turning cream into whipped cream.

What is crankcase relief valve?

The crankcase relief valves have two crucial functions: they relieve crankcase pressure and prevent flames from escaping the crankcase.

What stroke in which the explosion takes place and the piston is pushed downwards?

3. Power stroke: when the piston ascends and reaches top dead center, an electric current ignites the spark plug and as the mixed gas burns, it expands and builds pressure in the combustion chamber. The resulting pressure pushes the piston down with several tons of force.

What is crankcase door explosion release valve?

marine. A relief valve fitted to the engine crankcase doors as a safeguard against explosions. It relieves excess pressure, stop flames being emitted and prevent from the entry of air into the crankcase.

What is primary and secondary crankcase explosion?

The primary explosion produces a shock wave which propagates inside the crankcase with increasing speed and distance traveled. ... This explosion is known as secondary explosion and it causes very severe damage to engine plating. Crankcase explosions have been a result for the loss of several lives of people in the past.

What is a crankcase and what does it do?

The crankcase is the "body" that holds all of the other engine parts together. It's the largest part of the engine, but must be designed to be both strong and light. To keep the weight low, the brothers used aluminum to make the crankcase. The crankcase was cast at a foundry in Dayton.

What causes oil mist in crankcase?

Formation of Oil Mist

Oil mist may form when high pressure fuel oil, lubricating oil, hydraulic oil, or other oil is sprayed through a narrow crack, or when leaked oil connects with a high temperature surface, vaporizes, and comes in contact with low air temperature.

What is crankcase pressure sensor?

The Crank Case Pressure Sensor is used to monitor the pressure of the engine oil in the Crankcase, a nd signal a warning if there are any large fluctuations, or if the pressure falls below the minimum or above the maximum indicated pressure.

How does an engine trap the explosion of air and fuel?

The inlet or suction stroke begins when the piston draws air into the cylinder through an the inlet valve. When the piston reaches the bottom of the cylinder, the inlet valve closes, trapping the air inside the cylinder.