A multi-valve or multivalve four-stroke internal combustion engine is one where each cylinder has more than two valves – more than the minimum required of one of each, for the purposes of air and fuel
A cylinder head of a four-valve Nissan VQ engine
Cutaway model of Subaru's i-AVLS variable valve timing system on SOHC 4-valve-per-cylinder EJ25 boxer engine at Tokyo Motor Show 2007.
Combustion chamber of a 2009 Ford Ecoboost 3.5-liter turbocharged V6 petrol engine (77.8 kW/liter) showing two intake valves (right), two exhaust valves (left), centrally placed spark plug, and direct fuel injector (right).
A cylinder head from a 1987 Honda CRX Si showing SOHC, rocker arms, valve springs, and other components. This is a multi-valve configuration with two intake valves and one exhaust valve for each cylinder.
The Audi Quattro is a road and rally car, produced by the German automobile manufacturer Audi, part of the Volkswagen Group. It was first shown at the 1980 Geneva Motor Show on 3 March. Production con
Multi-valve
…For their YZ250F and YZ450F motocross bikes, Yamaha developed five-valve engines. Bugatti (EB 110), Ferrari (F355, 360 and F50), Volkswagen - Audi (Audi Quattro) - Skoda (Octavia vRS) and Toyota (4A-GE 20V) have all produced five-valve-engined vehicles. In 1985, Maserati made an experimental 2.0-liter turbo V6…
Audi Quattro's Group 4. Earlier car in front, later variant with wheel arch extensions in the back