Chevron U.s.a. Inc.

Chevron Research Company

Richard J Peyla

Curtis Bay Campbell

William James Cannella

A fuel composition having a boiling range of between 95 to 440 degrees Fahrenheit containing (a) a saturates content below 55 vol %; (b) a RON of from about 88 to about 91; (c) an olefins content of from about 0 to about 5 vol %; (d) an aromatics content of from about 32 to about 40 vol %; (e) an ethanol content of from about 8 to about 16 vol %; (f) an octane sensitivity of from about 8 to about 11; and the fuel composition is used in an HCCI engine.

Fuel composition

A fuel composition for gasoline engines which keeps combustion chambers clean, does not contribute to octane requirement increase and even serves to decrease the octane requirements of an engine which has undergone octane requirement increase while operating on other fuel compositions. The fuel composition comprises a major amount of gasoline and at least 0.4 weight percent of a hydrocarbyl poly(oxyalkylene) aminocarbamate.

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Orinda, CA, United States of America

Richard J Peyla