Intercooler condensate to sump or positive crankcase ventilation flow
First Claim
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1. An engine method for removing condensate from a charge air cooler, comprising:
- automatically draining water condensate from the charge air cooler to a liquid storage reservoir;
adjusting a drain valve in the liquid storage reservoir in response to conditions of the liquid storage reservoir and an engine oil sump to introduce drained condensate to the engine oil sump; and
evaporating at least a portion of the drained condensate in the liquid storage reservoir and directing the evaporated portion to a PCV flow.
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Abstract
Methods and systems are provided for removing condensate from a charge air cooler. Condensate may be drained from the charge air cooler and introduced into a positive crankcase ventilation flow or an engine oil sump. Introducing condensate into the engine oil sump may be controlled based on conditions of the engine oil sump and stored condensate.
28 Citations
16 Claims
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1. An engine method for removing condensate from a charge air cooler, comprising:
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automatically draining water condensate from the charge air cooler to a liquid storage reservoir; adjusting a drain valve in the liquid storage reservoir in response to conditions of the liquid storage reservoir and an engine oil sump to introduce drained condensate to the engine oil sump; and evaporating at least a portion of the drained condensate in the liquid storage reservoir and directing the evaporated portion to a PCV flow. - View Dependent Claims (2, 3, 4, 5)
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6. An engine method for removing condensate from a charge air cooler, comprising:
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automatically draining water condensate from the charge air cooler to a liquid storage reservoir; and adjusting a drain valve in the liquid storage reservoir in response to conditions of the liquid storage reservoir and an engine oil sump, where the conditions include a fluid level in the engine oil sump, a liquid condensate level in the liquid storage reservoir, an oil temperature in the engine oil sump, and a pressure difference between the liquid storage reservoir and the engine oil sump. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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15. An engine system for removing condensate from a charge air cooler, comprising:
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an engine including a cylinder head, an engine block, and an engine oil sump; a positive crankcase ventilation system, with a positive crankcase ventilation flow path leading into an engine intake manifold; the charge air cooler with an automatic drain tube to drain water condensate from the charge air cooler to a liquid storage reservoir, the liquid storage reservoir positioned adjacent to the engine block for storing liquid condensate in the liquid storage reservoir and evaporating a portion of the drained liquid water condensate into water vapor directed to the positive crankcase ventilation flow path;
a drain valve, connected between the liquid storage reservoir and engine oil sump; anda controller with non-transitory computer readable executable instructions to adjust a position of the drain valve to control flow of liquid from the liquid storage reservoir into the engine oil sump responsive to a fluid level in the engine oil sump. - View Dependent Claims (16)
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Specification