Internal-combustion engines – Precombustion and main combustion chambers in series – Having specific connecting passage means between...
Patent
1980-12-23
1982-03-23
Cox, Ronald B.
Internal-combustion engines
Precombustion and main combustion chambers in series
Having specific connecting passage means between...
123260, 123261, 123263, 123275, 123283, 123291, F02B 300, F02B 2300
Patent
active
043207278
ABSTRACT:
Stratified charge four-stroke-cycle internal combustion engine with fuel injection and spark-ignition of the type wherein stratification and initial combustion occurs in a combustion chamber auxiliary to the variable volume space in the engine cylinder between the piston and the cylinder head. Unique aspirating passage means communicating between the auxiliary chamber and the variable volume space conducts and causes air entering the chamber at one end, pursuant to the piston's compression stroke, to form a substantially non-turbulent air column rotating about the chamber axis and acretively compressed, by continued entry of air, toward and against the opposite end of the chamber. Fuel is injected into air initially in the chamber and that initially entering through the aspirating passage to mix with such air to form a spark-ignitable air-fuel mixture compressed against said other chamber end. The remaining air forced into the chamber pursuant to the compression stroke comprises a substantially discrete mass creating the desired compression of the chamber contents for spark-ignition and combustion of the fuel. After the combustion and exhaust cycles that sequentially follow ignition, there remains a residue of combustion products in the combustion chamber. These products are swept from this chamber through the aspirating passage into the variable volume space by replacement air, pursuant to the ensuing air intake stroke of the piston, that is allowed to enter the chamber through a valve-controlled inlet passage leading into the chamber adjacent its said other end. Fresh air is thus provided in the chamber for compression into the succeeding air-fuel mixture stratum to promote reliable ignition and operation with a small amount of fuel for engine idle and part load conditions. Additional fuel is injected into the entering discrete air mass in an amount proportional to desired additional power output for the engine.
REFERENCES:
patent: 1919488 (1933-07-01), Thulin
patent: 2223090 (1940-11-01), Boxan
patent: 3304922 (1967-02-01), Hidel
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