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American Motors Corporation (AMC) produced a series of widely used V8 engines from the mid-1950s before being absorbed into Chrysler in 1987. Chrysler kept the AMC V8 in production until 1991 for the Jeep Grand Wagoneer. == Gen-1 Nash/Hudson/Rambler V8s (1956–1966) == This engine is also known as the Rambler V8 and the Nash V-8. It is the first generation AMC V-8 design, AMC having been formed in 1954 with development on this engine starting shortly after. The term "Gen-1" is a Chevrolet "hash tag" used in recent times to differentiate AMC's first '56-'57 V8 from the second '66-up V8 engines. American Motors' president, George W. Mason, negotiated a verbal agreement with Packard that the two companies would supply parts for each other when practical. This was a prelude to a possible merger of the two companies at a later date, but that never occurred. With the industry-wide acceptance of V8 engine designs after World War II, AMC started buying Packard V8s in 1954 for the 1955 Nash Ambassador and Hudson Hornet. These were supplied with Packard "Ultramatic" automatic transmissions - exclusively. Packard sent AMC some parts bids, but these were rejected as too expensive. George W. Romney, AMC's new head, decided against further relationships with Packard shortly after entering the position of CEO in October 1954 after Mason's sudden death. Romney ordered his engineering department to develop an in-house V8 as soon as possible. The engineering department hired David Potter, a former Kaiser Motors engineer, to help develop the engine. Potter had previously worked on a V8 design for Kaiser, and with the experience and expertise of AMC chief engineers John Adamson and Carl Burke, they were able to get the all new V8 into production in less than 18 months, an extraordinary engineering feat at the time. American Motors' 1956 Rambler V8 engine design shows a near identical architecture to the '49-'53 Cadillac V-8. It incorporates a few significant Nash and Hudson design characteristics such as the 'Hudson X' style crankshaft gallery (the main bearing webbing forms an ''X'' shape bracing the crankshaft for added strength and durability) and Nash design rocker arms which they claimed offered the best "cold start oil delivery" to the valves. All these engines share common external dimensions, light weight - about - forged crankshaft and rods, as well as most other parts. The stroke for all Gen-1 V8s is . Engine displacement was a factor of the bore: the has a bore, , and the a bore. The bore size is cast on the top of the block near the back of the right bank cylinder head. Like most V8 engine designs of the 1950s, the block features a deep skirt where the casting extends below the crankshaft centerline, forming a very rigid crankcase gallery. The oil system feeds a central gallery to the cam and crankshaft first from front to rear, and then dividing at the front to feed the two lifter galleries from front to rear. From the rear of the two lifter galleries oil is then supplied up to the two rocker arm shafts which serve as galleries to lubricate the valve train. The fore and aft direction changes are designed to eliminate stale oil areas which tend to form sludge deposits. Juxtaposed with the Rambler V8, the Chevrolet small-block engine feeds both lifter galleries and the central cam and crankshaft galleries simultaneously through a three way split from the rear, having oil proceed to the front of the engine, the lifter galleries feeding oil to the valve train through hollow pushrods. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「AMC V8 engine」の詳細全文を読む スポンサード リンク
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