30-04-2015 дата публикации
Номер: US20150113978A1
Embodiments of systems and methods for bypassing an aftercooler are disclosed. According to one embodiment, the bypass valve system may include a turbocharger, an air temperature sensor, an aftercooler, a three-way bypass valve, an aftercooler conduit, a bypass conduit, a pipe fitting, an engine, a radiator, an expansion tank, a pump, a bypass control system and a locomotive control system. The temperature of the charge air is measured and sent to the bypass control system. The locomotive control system sends engine throttle conditions, such as engine notch position, to bypass control system. Bypass control system determines whether to circulate coolant through the aftercooler or bypass the aftercooler based on the temperature measurements and the engine throttle conditions. Bypass control system then sends a signal to the bypass valve to either to circulate coolant through the aftercooler or bypass the aftercooler through the conduit. 1. A cooling system for an internal combustion engine comprising:a turbocharger; and a radiator,', 'an engine coolant expansion tank,', 'an aftercooler for receiving combustion air from the turbocharger, the aftercooler comprising an air-to-liquid heat exchanger for exchanging heat between the combustion air and a liquid coolant,', 'an engine,', 'a liquid coolant pump for continuously circulating liquid coolant throughout the single coolant loop,', 'a liquid coolant bypass conduit that bypasses the aftercooler,', 'a temperature sensor for measuring an ambient air temperature, and', 'a three-way bypass valve for controlling a flow of the liquid coolant to the aftercooler and the liquid coolant bypass conduit, the three-way bypass valve comprising:', 'an outlet for supplying the liquid coolant to the aftercooler, and', 'an inlet for receiving the liquid coolant from the expansion tank,'}, 'an outlet for supplying the liquid coolant to the liquid coolant bypass conduit., 'a single coolant loop comprising2. The cooling system of claim 1 , ...
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