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This engine started as a straight-five-cylinder Audi diesel in 1989 (itself derived from the EA827 series), but got reduced to an inline-four-cylinder for Volkswagens use. It is related (through several evolutions of engine families) to the EA827 series, indirect-injection diesels, 16 valves, and five-cylinder gasoline engines.
The following articles list Volkswagen Group engines which are available worldwide. These include motor vehicle engines, marine engines sold by Volkswagen Marine [1] and industrial engines sold by Volkswagen Industrial Motor.
Its inline six cylinder block is constructed from grey cast iron, and has seven main bearings to support the die-forged steel crankshaft. The cast aluminium alloy cylinder head contains two valves per cylinder each with two concentric valve springs, and shim-adjustable bucket tappets.
When this was updated the AQN/AZX engine had 20 valves in total, with 4 unequal sized valves per cylinder. Due to the use of a single cylinder head, a key design principle of the VR engines, exhaust and intake ports were of unequal length between the two cylinder banks. To mitigate this, Volkswagen used unequally sized valves to ensure even ...
However, a new cylinder head is fitted to this "PD" engine, to accommodate "Pumpe Düse" Unit Injectors. identification parts code prefix: 038, 03G (VAG group indicate higher output models by a red 'I' on their TDI badge, e.g. 96 kW model Audi B6 A4. Because of this, the term 'red I' has entered into automotive technicians parlance)
For aircraft use, a number of experimenters, who were seeking a small, two-cylinder, four-stroke engine, began cutting Type 1 VW engine blocks in half, creating a two-cylinder, horizontally opposed engine. The resulting engine produces 30 to 38 hp (22 to 28 kW). Plans and kits have been made available for these conversions. [20] [21]
Of their eight-cylinder petrol engines, all Volkswagen Group V8 engines are primarily constructed from a lightweight cast aluminium alloy cylinder block (crankcase) and cylinder heads. They all use multi-valve technology, with the valves being operated by two overhead camshafts per cylinder bank (sometimes referred to as 'quad cam').
The wasserboxer features a cast aluminium alloy cylinder block, cylinder heads, and pistons; and a die-forged steel flat plane crankshaft with four main bearings. [1]As in Volkswagen's earlier air-cooled luftboxer engines, the wasserboxer's three-bearing camshaft is driven directly from the crankshaft by means of a small steel gear on the crankshaft and a larger aluminium gear on the camshaft ...