Two-Temperature Vapor Lock and High-Temperature Driveability Performance of 1982 Passenger Vehicles.
Rept. for 20 Sep-19 Oct 82.
COORDINATING RESEARCH COUNCIL INC ATLANTA GA
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The 1982 CRC High-Temperature Driveability Program was conducted at the US Army Proving Grounds near Yuma, AZ, from September 20 through October 19, 1982, at nominal ambient temperatures of 70 F and 95 F. CRC has conducted previous programs for the evaluation of vapor lock and hot start and driveability of 1971 and 1975 model passenger cars. Since 1975, vehicle designs have changed rapidly to meet more stringent exhaust emissions and fuel economy standards. These changes may affect vehicle high-temperature performance. THe 1982 CRC High-Temperature Drivability Program investigated the effect of such changes on vapor lock performance of nineteen 1982 passenger vehicles at nominal temperatures of 70 F an 95 F. The two-temperature corrections of volatility over a range of temperature from 70 F to 95 F. Hot-start and driveability performance was evaluated at a nominal 95 F temperature by two test procedures. A new city driveability procedure emphasized conditions that could cause performance problems encountered in heavy stop-and-go traffic after a period of temperature stabilization. Selected vehicles were also evaluated using the CRC Hot-Start and Driveability Procedure.
- Surface Transportation and Equipment