Volkswagen - Neat Ethanol Vehicles

Neat Ethanol Vehicles

Volkswagen do Brasil produced and sold neat ethanol vehicles (E100 only) in Brazil, and production was discontinued only after they were substituted by the more modern technology of flexible-fuel vehicles. As a response to the 1973 oil crisis, the Brazilian government began promoting bioethanol as a fuel, and the National Alcohol Program -Pró-Álcool- (Portuguese: Programa Nacional do Álcool) was launched in 1975. Compelled by the second oil crisis, and after development and testing with government fleets by the Brazilian General Command for Aerospace Technology (CTA) (CTA) at São José dos Campos, and further testing of several prototypes developed by the four local carmakers, including Volkswagen do Brasil, neat ethanol vehicles were launched in the Brazilian market beginning in that year. Gasoline engines were modified to support hydrous ethanol characteristics and changes included compression ratio, amount of fuel injected, replacement of materials that would get corroded by the contact with ethanol, use of colder spark plugs suitable for dissipating heat due to higher flame temperatures, and an auxiliary cold-start system that injects gasoline from a small tank in the engine compartment to help starting when cold. Six years later around three quarters of Brazilian passenger cars were manufactured with ethanol engines.

Production and sales of neat ethanol vehicles tumbled beginning in 1987 owing to several factors, including a sharp decline in gasoline prices as a result of the 1980s oil glut, and high sugar prices in the world market, shifting sugarcane ethanol production from fuel to sugar. By mid 1989 a shortage of ethanol fuel supply in the local market left thousands of vehicles in line at gas stations or out of fuel in their garages, forcing consumers to abandon ethanol vehicles.