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An interference engine is a type of 4-stroke internal combustion piston engine in which one or more valves in the fully open position extends into any area through which the piston may travel. By contrast, in a non-interference engine, the piston does not travel into any area into which the valves open. Interference engines rely on timing gears, chains, or belts to prevent the piston from striking the valves by ensuring that the valves are closed when the piston is near top dead center. Interference engines are prevalent among modern production automobiles and many other four-stroke engine applications; the main advantage is that it allows engine designers to maximize the engine's compression ratio. However, such engines risk major internal damage if a piston strikes a valve due to failure of camshaft drive belts, drive chains, or drive gears.[1]
^Explanation of the results of timing belt failure in an interference engine
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An interferenceengine is a type of 4-stroke internal combustion piston engine in which one or more valves in the fully open position extends into any...
DOHC. Valve adjustment is by shim over bucket. The 2RZ-FE is an interferenceengine with a timing chain. A 2.2 L (2,185 cc) version called the 4RB3 is...
OHC non-interferenceengines (except the VVT-i version which is an interferenceengine), multivalve DOHC (except the 1G-EU SOHC 12 valve engine) and variable...
non-turbo, non-VVT-i 1JZ-GE is a non-interferenceengine. Applications: Mark II Chaser Cresta Crown Like all JZ-series engines, the early 1JZ-GE is designed...
formulation Viral interference, one viral infection inhibiting another InterferenceengineInterference fit, in engineering Interference lithography, in...
The DOHC and SOHC 16-valve 4G64 are interferenceengines, while the SOHC 8-valve 4G64 is a non interferenceengine. From March 1996 an LPG version with...
000 km). In a non-interferenceengine, timing belt failure does not cause further damage to the engine. However, in an interferenceengine, failure of the...
timing belt is not replaced in time and fails and the engine is an interferenceengine, major engine damage is possible. The first known automotive application...
stands for Breakthrough Engine with Advanced Mechanism System - motors). This is commonly referred to as a "non-interference" engine. Piston pins holding...
system with three coils. Camshafts are belt-driven. It is a non-interferenceengine. Applications: 1993–2004 Toyota Land Cruiser Prado 1995–1998 Toyota...
cams (both sides of the engine) and the water pump. Because they are non-interferenceengines, if the timing belt fails, the engine of the models up to 1995...
series (B200K, B230K) are of 'non-interference' design, meaning that failure of the toothed belt will not result in engine damage. In 1981 the B21FT (a B21F...
break entirely, which almost always results in major damage to an interferenceengine. Third, the stretched chain can slap against the side of the timing...
cast aluminum pistons included valve clearance. Northstar is an interferenceengine: the valves will strike the pistons if they lose timing. It has bronze...
base engines were almost identical. However, crucially, the US management insisted that the US engines had to be "freewheeling", or a non-interference engine...
Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by...
[citation needed] All Forester 2.5 L engines are of the interferenceengine type.[citation needed] The flat engine can be mounted lower in the car and...
straight-three engine, the G10 tends not to idle as smoothly as other engines such as a straight-six engine. This engine has a non-interference valvetrain...
Chrysler-built 3.3 L V6 were available. The 3.0 engine is a non-interferenceengine. The 3.3 L V6 was not available until 1990. The four-cylinder came...
assemblies that caused severe damage when not maintained properly in this interferenceengine design. One other notable change was the air intake and intake manifold...
compression; thus, the diesel engine is called a compression-ignition engine (CI engine). This contrasts with engines using spark plug-ignition of the...
design with an interference fit with the piston. List of auto parts Nunney, Malcolm James (2007) "The Reciprocating Piston Petrol Engine: Gudgeon pins...
the engine without the need for human interference. The most useful instrument for analyzing the performance of steam engines is the steam engine indicator...
1998–2010 3.5 L, and the 2007–2011 4.0 L engines are interference designs. The 3.5 L; 214.7 cu in (3,518 cc) engine was a version of the 3.3 with a larger...
changes from Nissan before it would use the engine. Along with making the VG30E a non-interferenceengine, Ford requested the addition of an oil level...
against the search engine Google. SearchKing's claim was that Google's tactics to prevent spamdexing constituted a tortious interference with contractual...
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