Which V-type engine valve train design may use four camshafts?

Which V-type engine valve train design may use four camshafts?

• A. DOHC
• B. SOHC
• C. OHV
• D. CVVT

Answer: (A)

In a V-type engine, the total number of camshafts depends on how many camshafts are used per cylinder head. Four camshafts appear when each cylinder head has two camshafts—one set for the intake valves and one set for the exhaust valves. This dual overhead camshaft arrangement per bank adds up to four cams in a typical two-bank V engine. This is why the four-cam setup is associated with a DOHC design: two camshafts per head, bank by bank, allowing independent control of intake and exhaust valves on each side. The other options don’t fit because SOHC uses one camshaft per bank (two total), OHV uses a camshaft in the engine block driving pushrods (generally just one camshaft), and CVVT is a timing technology that can be used with overhead cam designs but doesn’t by itself specify having four camshafts.

In a V-type engine, the total number of camshafts depends on how many camshafts are used per cylinder head. Four camshafts appear when each cylinder head has two camshafts—one set for the intake valves and one set for the exhaust valves. This dual overhead camshaft arrangement per bank adds up to four cams in a typical two-bank V engine.

This is why the four-cam setup is associated with a DOHC design: two camshafts per head, bank by bank, allowing independent control of intake and exhaust valves on each side. The other options don’t fit because SOHC uses one camshaft per bank (two total), OHV uses a camshaft in the engine block driving pushrods (generally just one camshaft), and CVVT is a timing technology that can be used with overhead cam designs but doesn’t by itself specify having four camshafts.