Двигатель Ferrari Colombo: История и эволюция легендарного V12

The Ferrari Colombo Engine was a petrol fueled, water cooled, carburetted 60° V12 engine designed by Gioacchino Colombo and produced in numerous iterations by Italian automaker Ferrari between 1947 and 1988. The maker's first homegrown engine, its linear successor is the Lampredi V12, which it far outlived, the last Lampredi being made in 1959. Colombo, who had previously designed Alfa Romeos for Enzo Ferrari, placed bore centres at 90 mm apart, allowing for significant expansion. Displacements ranged from the diminutive debut that powered the 125S racer to the unit in the 1986 412i grand tourer. Significant updates were made in 1963 for the 330 series, featuring a redesigned block with wider, 94 mm, bore spacing. Enzo Ferrari had long admired the V12 engines of Packard, Auto Union, and Alfa Romeo (where he was long employed), but his first car, the 1940 Auto Avio Costruzioni 815, used a Fiat derived straight 8. Development of the V12 Colombo engine continued long after Colombo had been replaced by Aurelio Lampredi as the company's marquee engine designer. Although the Lampredi V12 was a real force for the company, it was Colombo's engine which powered Ferrari to the forefront of high performance automobiles through the 1950s and 1960s. TOC

The early 166, 195, and 212 cars used Colombo V12s of varying sizes. All shared the same stroke, with 60, 65, and bores giving displacements of in the 166, in the 195 and in the 212, respectively. Output ranged from to .

One of the most common Colombo engines is the 250, which debuted in 1952 in the 250S and lasted through the 1963 330 America. It used a bore with the common Colombo stroke of for a total of
Beginning with the famous 250 TR, "Testa Rossa" racing car, Ferrari began a new series of modifications to the Colombo 250 engine. The spark plugs were moved to the outside of the cylinder head, near the exhausts. This enabled Ferrari to introduce separate individual intake ports to use with the six two barrel Weber carburetors. Four cylinder head bolts per cylinder were introduced (instead of three) to cope with the added power. These changes eventually were incorporated into the Ferrari road cars, beginning with the 250 GT SWB and the 250 GT Series II Pininfarina cars.

The final Colombo Ferrari was the 275. It used a variant of the V12 with a wide bore for up to .

The 1960 400 Superamerica replaced the previous model's Lampredi engine with a Colombo. It diverged from the standard stroke with a stroke and bore. Output was with triple Weber carburetors. Although the 1963 330 series also used a engine with the same bore and stroke as the 400 Superamerica, this engine was quite different. It used a wider bore spacing, paving the way for future displacement increases. The spark plugs were moved and a new water pump was used. The dynamo on the prior versions was replaced by an alternator.

The Colombo V12 was substantially reworked for 1967's 275 GTB/4. It still used two valves per cylinder, but dual overhead cams were now used as well. In a departure from previous Ferrari designs, the valve angle was reduced three degrees to 54° for a more compact head. The dual camshafts also allowed the valves to be aligned "correctly" (perpendicular to the camshaft) instead of offset as in SOHC Ferraris. It was a dry sump design with a huge capacity. The engine retained the bore and stroke dimensions of the 275 model for of displacement. Output was at 8000 rpm and of torque at 6000 rpm with six 40 DCN 9 Weber carburetors.