Engine device
Number of patents in Portfolio can not be more than 2000
United States of America
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Jan 4, 2022
Grant Date -
Nov 25, 2021
app pub date -
Apr 20, 2021
filing date -
Apr 20, 2021
priority date (Note) -
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Abstract
When an execution condition for a purge of supplying evaporated fuel gas to an intake pipe is met, a required purge ratio is set within a range equal to or higher than a lower-limit purge ratio, and a purge control valve is controlled using a driving duty based on the required purge ratio. In this case, when the execution condition is continuously met, an ejector pressure is estimated based on a pressure difference between a supercharging pressure and a pre-compressor pressure, and on the driving duty, and the lower-limit purge ratio is set based on a post-throttle-valve pressure and on the ejector pressure. The value of the lower-limit purge ratio is set to zero immediately after the execution condition switches from being not met to being met.
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