| 72doug2,2S |
10-15-2010 04:43 AM |
Quote:
Originally Posted by Racerbvd
(Post 5616175)
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Is that Chrysler's turbine engine? I'm reading a book right now about that. Leno has one.
Quote:
The fourth-generation Chrysler turbine engine ran at up to 44,500 Revolutions per minute (rpm), according to the owner's manual[1], and could use diesel fuel, unleaded gasoline, kerosene, JP-4 jet fuel, and even vegetable oil. The engine would run on virtually anything and the president of Mexico tested this theory by running one of the first cars—successfully—on tequila. Air/fuel adjustments were required to switch from one to another, and the only evidence of what fuel was being used was the odor of the exhaust.
The engine[2] had a fifth as many moving parts as a piston unit (60 rather than 300). The turbine was spinning on simple sleeve bearings for vibration-free running. Its simplicity offered the potential for long life, and because no combustion contaminants enter engine oil, no oil changes were considered necessary. The 1963 Turbine's engine generated 130 brake horsepower (97 kW) and an instant 425 pound-feet (576 N·m) of torque at stall speed, making it good for 0-60 mph in 12 seconds at an ambient temperature of 85 °F (29 °C)—it would sprint quicker if the air was cooler and denser.
The absence of a distributor and points, the solitary start-up spark plug and the lack of coolant eased maintenance, while the exhaust did not contain carbon monoxide (CO), unburned carbon, or raw hydrocarbons. Nevertheless, the turbine generated nitrogen oxides (NO) and the challenge of limiting them helped to kill the program.
Its power turbine was connected, without a torque converter, through a gear reduction unit to an otherwise ordinary TorqueFlite automatic transmission. The flow of the combustion gases between the gas generator and free power turbine provided the same functionality as a torque converter but without using a conventional liquid medium. Twin rotating recuperators transferred exhaust heat to the inlet air, greatly improving fuel economy. Varying stator blades prevented excessive top end speeds, and provided engine braking on deceleration. Throttle lag, high fuel consumption—17 miles per US gallon (14 L/100 km; 20 mpg-imp)—and exhaust gas temperatures at idle plagued early models. Chrysler was able to remedy or mitigate most of these drawbacks and deficiencies. The Turbine Car also featured a fully stainless steel exhaust system, the exits of which were flat in cross section. This was intended to spread the exhaust gases thinly and thus cool them further, so that the vehicle could stand in traffic without risking damage to following traffic. The combustor, or burner, was somewhat primitive by the standards of modern turbojet engines. A single reverse-flow canister featuring a more-or-less standard spark plug for ignition was employed. Had the engine been further developed, annular combustion chambers along with a second power turbine might have improved power and economy even more.
The turbine car had some operational drawbacks. The car sounded like a giant vacuum cleaner, which was not satisfying to consumers who were more comfortable with the sound of a large American V8. High altitudes also caused problems for the combined starter-generator. Failing to follow the correct start-up procedure would cause the engine to stall; some consumers thought they could "warm" the engine up similar to the way they did with a gasoline engine. They would press the accelerator pedal to the floor before the engine had reached proper temperature. Instead of warming the engine, the excess fuel slowed the turbine down and resulted in the opposite of the desired effect. Doing this, however, did not do any permanent damage to the engine. In fact, it was possible to apply full throttle immediately after starting the engine without much fear of excessive wear. The engines were remarkably durable considering how fragile turbine engines are when compared to internal combustion piston engines. Troubles were remarkably few for such a bold experiment. More than 1.1 million test miles were accumulated by the 50 cars given to the public, and operational downtime stood at only 4%.
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