Search results
Results from the WOW.Com Content Network
A flat-four engine, also known as a horizontally opposed-four engine or boxer engine, [1] is a four-cylinder piston engine with two banks of cylinders lying on opposite sides of a common crankshaft. The most common type of flat-four engine is the boxer-four engine , each pair of opposed pistons moves inwards and outwards at the same time.
However the larger width of flat engines (compared with the more common inline and V layouts) is a drawback, particularly when the engine is located between the steered wheels. [citation needed] Flat engines were used by various automobile manufacturers – mostly with a boxer-four design – up until the late 1990s.
The Volkswagen air-cooled engine is an air-cooled, gasoline-fuelled, boxer engine with four horizontally opposed cast-iron cylinders, cast aluminum alloy cylinder heads and pistons, magnesium-alloy crankcase, and forged steel crankshaft and connecting rods.
Similar to U engines, H engines consist of two separate flat engines joined by gears or chains. H engines have been produced with between 4 and 24 cylinders. An opposed-piston engine is similar to a flat engine in that pairs of pistons are co-axial but rather than sharing a crankshaft, instead share a single combustion chamber per pair of ...
A crossflow T-head sidevalve engine The usual L-head arrangement Pop-up pistons may be used to increase compression ratio Flathead with Ricardo's turbulent head. A flathead engine, also known as a sidevalve engine [1] [2] or valve-in-block engine, is an internal combustion engine with its poppet valves contained within the engine block, instead of in the cylinder head, as in an overhead valve ...
The Subaru EJ engine is a series of four-stroke automotive engines manufactured by Subaru. They were introduced in 1989, intended to succeed the previous Subaru EA engine . The EJ series was the mainstay of Subaru's engine line, with all engines of this series being 16-valve horizontal flat-fours , with configurations available for single, or ...
The Alfa Romeo Boxer engine was a water-cooled flat-4 piston engine, developed by Alfa Romeo for front-wheel drive, and longitudinal applications. It debuted on the Alfasud , which was introduced in 1971 at the Turin Motor Show . [ 1 ]
A straight-four engine (also referred to as an inline-four engine) is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft. The majority of automotive four-cylinder engines use a straight-four layout [ 1 ] : pp. 13–16 (with the exceptions of the flat-four engines produced by Subaru and Porsche) [ 2 ...