The paper presents the verification of the hardware implementation of the gasoline injection generation algorithm in a GDI engine using cycle-by-cycle control. The results of verification tests conducted on a Mitsubishi Carisma car engine are also presented.Combustion of an air-fuel mixture with a stoichiometric composition or one slightly different from it (excess air ratio λ = 0.997÷1.003) guarantees high efficiency of exhaust gas purification using a catalytic converter [3,7]. Supplying the engine with a mixture of the correct composition for a given operating point also allows for optimal engine performance. In a GDI direct injection engine, the correct mixture composition can be ensured in every operating cycle, as fuel injection directly into the combustion chamber is also possible after the intake valve has closed.
In order to deliver fuel to the combustion chamber in proportion to the amount of intake air, the mass of intake air is measured in each engine operating cycle, based on which the fuel dose ensuring the desired mixture composition is calculated [2]. (…)
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Source: Logistyka Magazine