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| transmission = | engine = | weight = | related = }} The Chevrolet Corvette (C4) is a sports car that was produced by Chevrolet for the 1984 through 1996 model years. The convertible returned, as did higher performing engines, exemplified by the LT5 found in the ZR-1. In early March 1990, the ZR-1 would set a new record for the highest 24 hour-5,000 mile land-speed by going over .〔(【引用サイトリンク】title=ZR-1 Net webpage (with copy of FiA record document) )〕 Though prices rose even as sales declined, the fourth generation Corvette won its own loyal following as one of the United States' most desirable sports cars. The last C4 was produced on June 20, 1996. ==Overview== The C4 Corvette was known for its evolved, sleek and modern look. In a departure from the fiberglass panels of its forebearers, the C4's rear bumpers and panels were made from molding plastics, a sheet molding compound. The C4 coupe was the first general production Corvette to have a glass hatchback (the limited edition 1982 Collectors Edition being the first Corvette equipped with this feature) for better storage access. The Corvette C4 came standard with an electronic dashboard with a digital liquid crystal display dash, with graphics for speed and RPM and digital displays for other important engine functions. The C4 represented a clean break from the previous generation of Corvette with a completely new chassis and modern, sleeker styling. Since emissions regulations were still changing and electronic engine management was in its infancy, horsepower was, compared to earlier generations, low. Therefore, the primary design emphasis, at least for the launch, was on handling and braking, with all-independent suspension with light-weight suspension and wheels, and all new brakes with aluminum calipers. The front suspension saw the C3's coil springs replaced by a transverse fiberglass mono-leaf spring, which was only 1/3 of the weight of the coil springs whilst also introducing an anti-roll bar-like effect on the front.〔(2014 Chevrolet Corvette Stingray Z51 Suspension Walkaround )〕 The price of this no-holds-barred emphasis on handling was ride comfort, especially with the Z51 performance and handling package. The C4 did not use separate body-on-frame construction like its predecessors. Instead, it used what GM termed a "uniframe", which consisted of a traditional perimeter frame, with the door posts, windshield frame, halo, and the rear portion of the floor pan integrated into one welded assembly. This was not a unibody assembly, as none of the exterior body panels were structural members. Due to a styling decision to use a targa top instead of T-tops, there was no structural member tying the windshield frame to the halo as on the C3. This required extremely tall side rails on the frame to maintain chassis rigidity, and as a result, the door sills were quite deep, with entry and exit likened by contemporary auto journals to a "fall in and climb out" experience. The targa top bolted into place, becoming a structural component, rather than simply latching on like T-tops. Despite the tall frame rails, the C4 was prone to rattles and squeaks, especially with the targa top removed. The emergency brake, located between the door sill and the drivers seat, was moved lower and toward the rear of the car in 1988 for easier entry and exit. From 1984 through 1988, the Corvette was available with a Doug Nash "4+3" transmission - a 4-speed manual coupled to an automatic overdrive on the top three gears. This unusual transmission was a synergy that allowed Corvette to keep a stout 4 speed, but add an overdrive. As technology progressed, it was replaced by a modern ZF 6-speed manual. However, the C4 performance was hampered by its L98 engine until 1992, when the second-generation Chevy small block, LT1, was introduced, markedly improving the C4s performance. 1996 was a high point of small block Chevrolet development and the LT4 was introduced in all manual transmission cars. The 1986 Corvette saw the reintroduction of the convertible and was named as the Pace Car for the Indianapolis 500. 1986 also saw the introduction of the Pass Key I passive anti-theft system, wherein each key contained a special pellet that could be detected and identified by the car's computer system by detecting electrical resistance. Being early in the rollout of this new technology, there were only 15 different resistance values available, which, once thieves discovered this weakness, markedly reduced the value of this early system. 44 Corvettes were manufactured with a 1983 Vehicle Identification Number (VIN), but none were released to the public as official production vehicles. All were destroyed except one, VIN 1G1AY0783D5100023 (white with medium blue interior), L83 , V8, 4-speed automatic transmission and was retired to the National Corvette Museum in Bowling Green, Kentucky. (MY1984 Corvettes were produced for 17 months.) 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「Chevrolet Corvette (C4)」の詳細全文を読む スポンサード リンク
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