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yamaha_fz1:gen_2_fuel_snatch_problem [2016/07/18 17:01] ko4bb created |
yamaha_fz1:gen_2_fuel_snatch_problem [2016/07/20 16:13] (current) ko4bb [So what’s the cause? (Part II)] |
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| There are various ways of minimising transport time, but if we assume the manufacturers have already explored the hardware solutions – optimum injector-nozzle angle, rate of delivery, number of nozzles, number of nozzle holes etc – the next step is to make further improvements through a) the resolution of the injection mapping software (how quickly and accurately the ECU monitors, selects and deploys the best fuel map for a given situation); and b) old-fashioned bench testing – going backwards and forwards over the motor, adjusting injection rates and times until it’s as right as it can be. | There are various ways of minimising transport time, but if we assume the manufacturers have already explored the hardware solutions – optimum injector-nozzle angle, rate of delivery, number of nozzles, number of nozzle holes etc – the next step is to make further improvements through a) the resolution of the injection mapping software (how quickly and accurately the ECU monitors, selects and deploys the best fuel map for a given situation); and b) old-fashioned bench testing – going backwards and forwards over the motor, adjusting injection rates and times until it’s as right as it can be. | ||
| - | Of course, the best way of avoiding the problem of fuel-injection snatch altogether > would be to add fuel on a closed throttle, like carbs do and like early bike efi systems used to (before the emissions bods had their misguided way). That way there’d be no fuel transport time, and no snatch. | + | Of course, the best way of avoiding the problem of fuel-injection snatch altogether would be to add fuel on a closed throttle, like carbs do and like early bike efi systems used to (before the emissions bods had their misguided way). That way there’d be no fuel transport time, and no snatch. |
| ====== The cure: Ivan’s Fuel Cutoff Eliminator ====== | ====== The cure: Ivan’s Fuel Cutoff Eliminator ====== | ||