Patent ID: 6807955
Filing Date: 2004-10-26
Classification: F02M,F28D

Abstract:
An exhaust gas cooler comprising:an exhaust gas inlet chamber communicating with an exhaust gas inlet, an exhaust gas outlet chamber communicating with an exhaust gas outlet, a coolant chamber arranged between said exhaust gas inlet chamber and said exhaust gas outlet chamber and having a coolant inlet and a coolant outlet communicating with the coolant chamber, a plurality of exhaust gas passages inside the coolant chamber and communicating with the exhaust gas inlet chamber and exhaust gas outlet chamber, a mechanism to attach an exhaust gas bypass passage outside the coolant chamber to communicate with the exhaust gas inlet chamber and exhaust gas outlet chamber wherein the mechanism avoids contact between a wall of the bypass passage proximate to an exhaust gas outlet of the bypass passage and a wall of the coolant chamber proximate to the exhaust gas outlet chamber and wherein the exhaust gas bypass passage or the mechanism allows for expansion and contraction of the exhaust bypass passage; and a valve operable between the exhaust gas passages and exhaust gas outlet to adjust flow of exhaust gas to the exhaust gas outlet from the exhaust gas passages and the exhaust gas bypass passage.