EGR cooling structure
AssigneeHonda Motor Co., Ltd.
InventorsNobuyuki Yoshida, Hiroshi Takemoto, Taichi Yoshikawa
Life of this patent
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Abstract
The EGR cooling structure includes a cylinder block having cylinders, and a cylinder head into which exhaust gas exhausted from the cylinders is collected. An exhaust emission control device is provided for purifying the exhaust gas exhausted from the cylinder head, and an EGR pipe is provided through which EGR gas of a part of the purified exhaust gas is introduced into an intake system. An EGR cooler is provided in the EGR pipe and cools the EGR gas with the cooling liquid. An exhaust gas passage leading from the cylinders to the exhaust gas purification device is curved when seen from a side, and the EGR cooler is disposed in the space surrounded by the cylinder block, the cylinder head, and the exhaust gas purification device.
Claims6
An EGR cooling structure comprising;
- a cylinder block having a plurality of cylinders;
- an exhaust manifold portion in which exhaust gas exhausted from each of the plurality of cylinders is collected;
- an exhaust emission control device for purifying the exhaust gas flowing from the exhaust manifold port;
- an EGR pipe through which EGR gas of a part of the purified exhaust gas is introduced into an intake system, and
- an EGR cooler attached between parts of the EGR pipe for cooling the EGR gas with a cooling liquid,
- wherein an exhaust gas passage from each of the plurality of cylinders to the exhaust emission control device is curved downward toward the exhaust emission control device when the exhaust gas passage is viewed from a side of the exhaust gas passage and the EGR cooler is disposed in a space surrounded by the cylinder block, and the exhaust gas manifold portion and the exhaust emission control device and between the exhaust emission control device and the cylinder block so that the cylinder block, the EGR cooler and the exhaust emission control device are seen overlapped with one another when viewed from a side of the cylinder block on which the exhaust emission control device is disposed.
Dependencies are inferred from the claim text.