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Two-hole Injector Improves Transient Performance and Exhaust, Emissions of 4-valve Engines
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Abstract
One of the main causes of the inadequate transient response of a 4-valve engine was established as being partition wall-wetting. The possibility of resolving this problem by improving fuel atomization was investigated. An air-mix type injector, although producing finer droplets with more uniform distribution, was not found effective in improving transient response.
The development of a two-hole injector is described. This new injector produces twin sprays which are directed into the siamese intake ports without wetting the partition wall. As a consequence, the lean A/F ratio excursion is reduced, torque stumble is eliminated and the conversion efficiency of a three-way catalyst is increased.
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Iwata, M., Furuhashi, M., and Ujihashi, M., "Two-hole Injector Improves Transient Performance and Exhaust, Emissions of 4-valve Engines," SAE Technical Paper 870125, 1987, https://doi.org/10.4271/870125.Also In
References
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