F - Mech Eng,Light,Heat,Weapons – 01 – M
Patent
F - Mech Eng,Light,Heat,Weapons
01
M
253/100
F01M 9/02 (2006.01) C10M 125/10 (2006.01) C10M 133/04 (2006.01) C10M 137/12 (2006.01) C10M 141/06 (2006.01) C10M 141/10 (2006.01) C10M 175/00 (2006.01)
Patent
CA 2002268
Piston deposits resulting from neutralizing combustion acids present in the lubricating oil circu- lating within the lubrication system of an internal combustion engine are reduced or eliminated by first contacting the acids with a soluble weak base in the piston ring zone of the engine to form soluble neutral salts containing the weak base and the combustion acids. Thereafter, the neutral salts are contacted with a heterogenous strong base immobilized within the lubrication system but outside of the piston ring zone. The strong base displaces the weak base from the neutral salts, returning the weak base to the oil for recirculation to the piston ring zone for further use. The remaining strong base/combustion acid salts are immobilized as deposits with the strong base rather than on the piston. In a preferred embodiment, tri- octadecyl amine is the weak base and zinc oxide is the strong base. In a particularly preferred embodiment, the weak base is incorporated on a substrate, prefer- ably a cement binder.
Bannister Eric
Brownawell Darrell W.
Ladwig Paul K.
Thaler Warren A.
Bannister Eric
Borden Ladner Gervais Llp
Brownawell Darrell W.
Exxon Research And Engineering Company
Ladwig Paul K.
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