F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/42
F02M 25/14 (2006.01) F02D 19/12 (2006.01) F02D 35/02 (2006.01)
Patent
CA 1174921
ABSTRACT OF THE DISCLOSURE METHOD AND APPARATUS FOR MINIMUM KNOCK OPERATION OF AN INTERNAL COMBUSTION ENGINE ON LOW KNOCK-RATED FUEL The invention relates to method of, and apparatus for, operating an internal combustion engine on low knock-rated fuels as the primary fuel system in which engine knock is anticipated and suppressed by simul- taneously detecting actual engine load conditions that may induce such knock and knock condition that actually are occurring in at least one combustion chamber of the engine. In response to such simultaneous conditions, a small but effective amount of anti-knock fluid is supplied to the engine combustion chambers in an amount and for a time sufficient only to suppress knock to a satisfactory level. Such a system permits the use of more economic fuels, such as gasoline, having a substantially lower knock rating than those normally used in automotive equip- ment and only small but sufficient anti-knock fluid is added solely when the engine is knocking. Such conditions occur over approximately 5-10 percent of road conditions and can readily be supplied by a 1-2 quart container of anti-knock fluid, such as higher knock-rated gasolines, alcohol or the like for each filling of the fuel tank with 10-20 gallons of less expensive low knock-rated gasoline to improve both economic and energy efficiency.
395900
Chevron Research And Technology Company
Smart & Biggar
LandOfFree
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