The firing order is the sequence of sparking of the spark plugs in a reciprocating engine, or the sequence of fuel injection in each cylinder in a Diesel engine. Choosing an appropriate firing order is critical to minimizing vibration and achieving smooth running, for long engine fatigue life and user comfort. This article or section should include material from Spark gap A spark plug is an electrical device that fits into the cylinder head of some internal combustion engines and ignites compressed aerosol gasoline by means of an electric spark. ... Components of a typical, four stroke cycle, DOHC piston engine. ... A Diesel engine built by MAN AG in 1906 Rudolf Diesels 1893 patent on his engine design The diesel engine is a type of internal combustion engine. ... Oscillation is the variation, typically in time, of some measure as seen, for example, in a swinging pendulum. ... Metal Fatigue is a 1999 real-time strategy and mecha computer game developed by Zono, Inc and released by Psygnosis. ...

V4 firing order: 1-3-4-2

In a conventional engine, the correct firing order is obtained by the correct placement of the spark plug wires on the distributor. In a modern engine with an engine management system and direct ignition, the Electronic Control Unit (ECU) takes care of the correct firing sequence. Image File history File links Firingorder. ... Image File history File links Firingorder. ... Distributor cap. ... An electronic control unit (ECU) (also known as an engine management system) is an electronic device, basically a computer, in an internal combustion engine that reads several sensors in the engine and uses the information to control the fuel injection and ignition systems of the engine. ... The ignition system of an internal-combustion engine is an important part of the overall engine system that provides for the timely burning of the fuel mixture within the engine. ... ECU may refer to: European Currency Unit Electronic Control Unit or Engine Control Unit East Carolina University Edith Cowan University Extreme Close-up This page concerning a three-letter acronym or abbreviation is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...

These are some usual firing orders:

The three cylinder two-stroke engine. ... The straight-4 or inline-4 is an internal combustion engine with four cylinders aligned in one row. ... 1. ... The Volvo 850 was a mid-size luxury car, that would also be considered a compact executive car, produced by the Swedish automaker Volvo Cars between 1992 and 1997. ... Audi 100 Avant 1994 (C4) The Audi 100 was a mid-sized automobile from Audi that was made between 1968 and 1994. ... The Jeep CJ (or Civilian Jeep) was a commercial version of the famous Military Jeep from World War II. The first CJ (the CJ-2) was introduced in 1944 by Willys, and the same basic vehicle stayed in production through 7 variants and 3 corporate parents until 1986. ... 1949 (MCMXLIX) was a common year starting on Saturday (the link is to a full 1949 calendar). ... 1986 (MCMLXXXVI) was a common year starting on Wednesday of the Gregorian calendar. ... The 3800 family is a large V6 engine used by General Motors. ... 1988 (MCMLXXXVIII) was a leap year starting on Friday of the Gregorian calendar. ... Fifth Avenue was a name used by Chrysler Corporation on its largest models from 1979 to 1993. ... For other uses of the term, see Small block (disambiguation). ... The LS is Generation III and Generation IV, the latest evolution of General Motors line of small-block V8 engines. ... Wikipedia does not have an article with this exact name. ... This article is about the year 2001. ... The Ferrari 456 and 456M are high-performance Ferrari front-engined grand tourer cars. ... Cadillac produced two of only three production V16 engine models in history. ...

Cylinder numbering

In a straight engine the spark plugs (and cylinders) are numbered, starting with #1, from the front of the engine to the rear. In most cars the front of the engine also points to the front of the car, but some manufacturers (Saab, Citroën) in some models place the engine 'backwards', with #1 towards the firewall. Usually found in 4 and 6 cylinder configurations, the straight engine (often designed as inline engine) is an internal-combustion engine with all cylinders aligned in one row, with no or only minimal offset. ... A piston and cylinder from a steam engine A cylinder in an internal combustion engine is the space within which a piston travels. ... Karl Benzs Velo model (1894) - entered into the first automobile race An automobile (or motor car) is a wheeled passenger vehicle that carries its own motor. ... Saab Automobile AB is a subsidiary of General Motors. ... Citroën is a French automobile manufacturer, founded in 1919 by André Citroën. ... This article is about firewalls used in construction. ...

In a radial engine the cylinders are numbered around the circle, with the #1 cylinder at the top. There are almost always an odd number of cylinders, as this allows for a constant every-other-piston firing order: for example, with a single bank of 7 cylinders, the order would be ...2-4-6-1-3-5-7-2.... Radial engine in a cut-away view. ...

The numbers are usually cast on the cylinder head or the intake manifold or the valve cover(s). To meet Wikipedias quality standards, this article or section may require cleanup. ... The cylinder head from a GMC van. ... Left side of a Ford Cologne V6 engine, clearly showing a (rusty) cast iron exhaust manifold - three exhaust ports into one pipe. ... A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. ...

In a V engine, cylinder numbering varies among manufacturers. Generally speaking, the most forward cylinder is numbered 1, but some manufacturers will then continue numbering along that bank first (so that side of the engine would be 1-2-3-4, and the opposite bank would be 5-6-7-8) while others will number the cylinders from front to back along the crankshaft, so one bank would be 1-3-5-7 and the other bank would be 2-4-6-8. (In this example, a V8 is assumed). To further complicate matters, manufacturers may not have used the same system for all of their engines. It is important to check the numbering system used before comparing firing orders, because the order will vary significantly with crankshaft design (see crossplane).
As an example, the well-known Chevrolet Small-Block engine has cylinders 1-3-5-7 on the left hand side of the car (right hand when looking from the front), and 2-4-6-8 on the other side, and uses a firing order of 1-8-4-3-6-5-7-2. Note that the order alternates irregularly between the left and right banks; this is what causes the famous 'burbling' sound of this type of engine. [1] A V engine is a common configuration for an internal combustion engine in which the pistons are aligned so that, if viewed along the line of the crankshaft, they appear to be in a V. Usually, two opposing pistons share one crank on the crankshaft. ... The crossplane or cross-plane is a crankshaft design for V8 engines with a 90° angle between the cylinder banks. ... // Chevrolets small-block V8 is a famous automobile engine. ...

• V8 engine numbering conventions (from the front of the car):

Trivia

• The neon lights on Flo's V8 Cafe in the movie Cars flash in the proper firing order for a Ford flathead V8.

A neon lamp is a gas discharge lamp containing neon gas at low pressure. ... ‹ The template below has been proposed for deletion. ... Supercharged Flathead V8 Engine block of a Flathead V8 showing the location of the valves (the small holes above the cylinder bores) Ford flathead V8 engine, modified for power, on cover of Hot Rod magazine. ...

See also

• two stroke cycle
• four stroke cycle

The two-stroke cycle of an internal combustion engine differs from the more common four-stroke cycle by having only two strokes (linear movements of the piston) instead of four, although the same four operations (intake, compression, power, exhaust) still occur. ... The four-stroke cycle of an internal combustion engine is the cycle most commonly used for automotive and industrial purposes today (cars and trucks, generators, etc). ...

External links

• Cylinder numbering and firing orders for American V8 engines