Spark-ignition engine
Patent 4742804 Issued on May 10, 1988. Estimated Expiration Date: 
February 5, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 5, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1658463 1894667 2001913 2191638 3924582 InventorsAssigneeApplicationNo. 07/010991 filed on 02/05/1987US Classes:123/256, Plural precombustion chambers123/279, Piston carried precombustion chamber123/310, COMBUSTION CHAMBER HAVING MULTIPLE SPARK GAPS123/661Having squish areaExaminersPrimary: Wolfe, Willis R.Attorney, Agent or FirmInternational ClassesF02P 15/00 (20060101)F02P 15/02 (20060101) F02B 23/08 (20060101) F02B 19/00 (20060101) F02F 1/24 (20060101) F02B 19/12 (20060101) F02F 1/42 (20060101) F02B 1/04 (20060101) F02B 1/00 (20060101) Foreign Application Priority Data1986-02-05 JPAbstractThere is disclosed a spark-ignition engine having a combustion chamber in which cavities are formed. The cavities are in communication with each other via a communication passage. Air-fuel mixture is appropriately held in the cavities. Spark plugs are disposed near the centers of the cavities to ignite the mixture at plural positions. At the top dead center, the clearance between the top surface of the piston and the lower surface of the cylinder head is made small to minimize useless space. A large squish area is provided to effectively collect the mixture in the cavities. Since the combustible mixture is always held in the vicinities of the spark plugs, stable and rapid combustion can be realized.Field of SearchPlural precombustion chambersWith ignition means particularly positioned relative to precombustion and main combustion chambers Having fluid whirling means Whirling in precombustion chamber only Piston carried precombustion chamber COMBUSTION CHAMBER HAVING MULTIPLE SPARK GAPS Having squish area | |
