Question

In __________ scavenging system the inlet and exhaust ports are located on opposite sides of the cylinder.

(a) loop

(b) uniflow

(c) cross

(d) none of the mentioned

This question was posed to me in final exam.

This intriguing question originated from Scavenging Pumps topic in division Two Stroke Engines of IC Engine

Answer 1

Answer: (c) cross

Explanation:

In the cross scavenging system, the inlet and exhaust ports are located on opposite sides of the cylinder. The charge (air-fuel mixture) enters from one side, while the exhaust gases are expelled through the port on the opposite side, creating a cross-flow of gases within the cylinder.

• Loop scavenging involves the intake and exhaust ports located on the same side of the cylinder, with the charge flowing in a loop pattern around the cylinder.
• Uniflow scavenging involves intake and exhaust ports located on the same side, with the charge flowing in a single direction across the cylinder, improving efficiency.

Thus, the correct answer is (c) cross.