Method and system for improving engine starting
An engine and cylinder technology, applied in the field of improving engine starting, to achieve the effect of stable engine starting and reducing emissions
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[0026] The present invention relates to control figure 1 The engine's cylinder intake port throttles are shown. exist figure 2 An example map of cylinder pressure is shown in and provides insight as to the location of maximum vacuum within the cylinder during lower engine speed conditions. In one example, multiple cylinder port throttles are independently adjusted during engine start to provide improved fuel evaporation. image 3 and Figure 4 The relevant signals during engine start are shown. Figure 5 and Figure 6 Provides a detailed view of different fuel timings during engine start. can be based on Figure 7 method of controlling cylinder port throttles to provide as Figure 3-6 sequence of descriptions. Figure 8 An alternate engine start sequence is shown for a system in which the engine port throttles can operate in unison. Figure 9 is a flowchart of an alternative method for controlling cylinder port throttles.
[0027] now refer to figure 1 , including ...
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