Title:
【発明の名称】ピストン付着物を減じる方法
Document Type and Number:
Japanese Patent JP2812515
Kind Code:
B2
Abstract:
Piston deposits resulting from neutralizing combustion acids present in the lubricating oil circulating 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 heterogeneous strong base immobilized within the lubrication system but outside 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, trioctadecyl 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, preferably a cement binder.
Inventors:
Darrell William Braunwell
Warren Allen Sailor
Eric Banister
Paul Kevin Ludwig
Warren Allen Sailor
Eric Banister
Paul Kevin Ludwig
Application Number:
JP29212789A
Publication Date:
October 22, 1998
Filing Date:
November 09, 1989
Export Citation:
Assignee:
Exxon Research and Engineering Company
International Classes:
C10M133/06; C10M137/12; C10M141/06; C10M141/10; C10M175/00; F01M9/02; C10M177/00; F02B77/04; F16N39/00; C10N30/04; C10N40/25; (IPC1-7): F01M9/02; C10M133/06; F02B77/04
Attorney, Agent or Firm:
Minoru Nakamura (8 outside)