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`
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`Ignition
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`/7
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`SOl
`
`K
`
`EOI
`
`Start of Injection
`
`End of Injection
`
`Normal Fuelling Rate (FR) = 50 mg/cyl/cycle
`
`Condition 1A
`SOI is 80° BTDC
`
`Conition 1B
`SOI is 80° BTDC
`EOI is 60° BTDC
`
`EOI is 25° ATDC
`
`FR = 30 mg/cyl/cy -
`
`/ ndition ZB
`sol is 5° ATDC
`EOl,is’.7_ ° ATDC
`
`» ni ion 3A
`SOI is 5° BTDC
`EOI is 15° ATDC
`
`Condition 3B
`$01 is 5° BTDC
`EOI is 15° ATDC
`
`R = 70 mg/cyl/c
`
`I-..................................................--W.
`
`
`
`.............................................................--
`
`iiiiiiiiiiiiiiiiiI...........,............,IWW0
`
`......................................I.3
`
`ix.....itiiiiiiiiiiiiiiiiiiiii--*iiiii-w
`
`
`
`.............................................................--Mb
`
`..............................................................I-.%
`
`TDC
`
`ATDC —%
`
`Crankangle -
`
`1. A method of operating an internal combustion engine comprising retarding the ignition of
`a gas/fuel mixture within at least one cylinder of the engine to after top dead centre (ATDC)
`in respect ofthe combustion cycle of said at least one cylinder ofthe engine. (0; -(H6 0[zlé_)N;§L
`Sumrss/av 0F a/l-/M_1
`
`Ex. 2010(21)
`
`AlI1'
`
`Ex. 2010(21) 1/1