Question

Explain the Ackerman principle of steering with neat sketch. (b)

Briefly explain about various types combustion chamber designed for
SI engines?

Answer 1

The Ackerman principle of steering involves using different angles for the front wheels to ensure all four wheels follow the same turning radius. Various types of combustion chambers designed for SI engines include prechamber, direct injection, and swirl chamber designs.

Step-by-step explanation:

The Ackerman principle of steering is a concept used in automotive engineering to ensure that all four wheels of a vehicle follow the same turning radius while turning. It involves the use of different angles for the front wheels to achieve this. In a neat sketch, the front wheels are angled inwards at different angles to create a geometric relationship between the turning circle centers of the front and rear wheels. This principle allows for better control and stability when steering.

Various types of combustion chambers are designed for spark-ignition (SI) engines. Some common types include:

1. Prechamber Combustion Chamber: It consists of a small chamber connected to the main combustion chamber where the fuel-air mixture is ignited. This design improves combustion efficiency and reduces emissions.
2. Direct Injection Combustion Chamber: Fuel is injected directly into the combustion chamber, resulting in better fuel atomization and mixing. This design improves power output and fuel efficiency.
3. Swirl Chamber Combustion Chamber: It features a specially shaped chamber that creates a swirling motion in the air-fuel mixture. This improves combustion efficiency and reduces emissions.