Pre-lubrication and skip fire operations during engine cranking
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United States of America
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Dec 21, 2021
Grant Date -
Jan 28, 2021
app pub date -
Jul 13, 2020
filing date -
Jul 13, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A system includes a valve actuation system, a pre-lubrication pump coupled to a lubrication circuit and configured to provide oil to the valve actuation system, a catalyst for receiving and treating exhaust gasses, and a controller. The controller is configured to identify an engine start request and determine whether the catalyst temperature is below a first threshold value. In response to determining that the catalyst temperature is below the first threshold value, the controller actuates the pre-lubrication pump to direct lubricant to the valve actuation system, controls the valve actuation system to deactivate at least one cylinder of an engine, and, subsequent to deactivating the at least one cylinder of the engine, cranks the engine.
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