EGR COOLING APPARATUS
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United States of America Patent
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Issued Date -
Oct 18, 2018
app pub date -
Mar 28, 2018
filing date -
Mar 28, 2018
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Abstract
An EGR cooling apparatus includes a first EGR cooling-water passage (passage parts) to cause cooling water flowing out of an engine to an engine cooling water passage to return to the engine cooling water passage via an EGR cooler; a second EGR cooling-water passage (passage parts) to cause cooling water flowing out of a radiator to the engine cooling water passage to return to the second EGR cooling-water passage via the EGR cooler; a three-way valve for switching a flow of cooling water for the EGR cooler between a first EGR cooling-water passage and a second EGR cooling-water passage; and an electronic control unit (ECU) to control the three-way valve to switch a flow of cooling water to the EGR cooler between the first EGR cooling-water passage during warm-up of the engine and a second EGR cooling-water passage after warm-up.
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