วันจันทร์ที่ 7 พฤษภาคม พ.ศ. 2550



Lexus is the luxury vehicle division of Japanese car maker Toyota Motor Corporation. Lexus brand name vehicles are sold in North America, the Middle East, Europe, Africa, Latin America, Asia and Oceania; in the United States, Lexus is the highest-selling brand of luxury cars. In 2005, the Lexus marque launched in Japan, marking the continued global expansion of the luxury division.
Since its debut in 1989, Lexus has developed a reputation for the reliability of its vehicles and the quality of its customer service. In 2006, consumer ratings firm J.D. Power and Associates named Lexus the most reliable brand in the U.S. based on its Vehicle Dependability Survey, a measure of over 47,000 vehicle owners and the problems they experienced in the first three years of vehicle ownership. It was the twelfth consecutive year that Lexus achieved this top rating.

The McLaren F1 was engineered and produced by McLaren Automotive, a subsidiary of the British McLaren Group that, among others, owns the McLaren Mercedes Formula One team. The car features a 6.1-litre 60° BMW S70 V12 engine and it was conceived as an exercise in creating what its designers hoped would be considered the ultimate road car. Only 100 cars were manufactured, 64 of those were street versions, 5 were LMs, 3 were GTs and the rest were GTR racing models. Production began in 1993 and ended in 1998.
The McLaren F1 was the fastest production car ever built (having achieved a top speed of 240.14 mph, 386.5 km/h) until surpassed in 2005 by the Koenigsegg CCR, and then the Bugatti Veyron a few months later

Engine

Gordon Murray insisted that the engine for this car be normally-aspirated to increase reliability and driver control. Turbochargers and superchargers increase power but they increase complexity and can decrease reliability as well as the ability of the driver to maintain maximum control of the engine. Murray initially approached Honda for an NA powerplant with 550BHP. BMW's motorsport division BMW M ended up building Murray a custom-built 6.1 L (6064 cc) 60-degree V12 based on BMW's M70/S2 engine with aluminum alloy block and head, 86 mm x 87 mm bore/stroke, quad overhead camshafts for maximum flexibility of control over the four valves/cylinder and chain drive for the camshafts for maximum reliability. At 266 kg, the resulting engine was slightly heavier than Murray's original maximum specification weight of 250 kg but also considerably more powerful than he had specified, which effectively canceled out the weight gain in a straight line; however, extra weight can cause handling problems around corners.

The carbon fiber body panels and monocoque required significant heat insulation in the engine compartment, so Murray's solution was to line the engine bay with the high efficient heat-reflector: gold foil. Approximately 25 g (0.8 ounce) of gold was used in each car.
The road version used a compression ratio of 11:1 to produce 620 horsepower at 7400 rpm—considerably more than Murray's specification of 450 horsepower. Torque output 480 ft·lb (651 N·m) at 5600 rpm.[1] Other, more highly tuned, incarnations of the F1 produced up to 680 hp. The engine has a redline and rev limiter at 7500 rpm.
From 1998 to 2000, the Le Mans–winning BMW V12 LMR sports car used a similar S70/2 engine



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