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What is the inlet valve face angle that is generally kept?(a) 25°(b) 30°(c) 45°(d) 45° or 30°I got this question during an online interview.Question is from Poppet Valves in portion Valve Timing Technologies of Automotive Engine Design

Answer»

The CORRECT answer is (d) 45° or 30°

The explanation: The inlet valve face angle is generally kept 45° or 30°. A smaller angle provides greater valve opening for a given LIFT, but poor sealing because of the reduced sealing PRESSURE for a given SPRING load.



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