Internal combustion engine
AssigneeHonda Motor Co., Ltd.
InventorShinji Shimoyama
Life of this patent
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Abstract
An internal combustion engine includes a deactivatable cylinder group, a constantly operating cylinder group, a first water passage, a second water passage, an upstream integrated water passage, a downstream integrated water passage, a connecting passage, a third water passage, and a device. The downstream integrated water passage includes a junction and an upstream end. The upstream end is closer to the second water passage than to the first water passage in the downstream integrated water passage. The third water passage connects the connecting passage and a portion provided between the junction and the upstream end in the downstream integrated water passage. The device is provided adjacent to at least a part of the third water passage to exchange heat with water flowing in the third water passage.
Claims10
An internal combustion engine comprising:
- a deactivatable cylinder group including at least one deactivatable cylinder to be selectively operated and deactivated according to a state of the internal combustion engine during operation of the internal combustion engine;
- a constantly operating cylinder group including a constantly operating cylinder to constantly operate during operation of the internal combustion engine;
- a first water passage provided around the deactivatable cylinder group;
- a second water passage provided around the constantly operating cylinder group;
- an upstream integrated water passage that communicates on an upstream side with a pump and communicates on a downstream side with upstream sides of the first water passage and the second water passage;
- a downstream integrated water passage that is connected on an upstream side to downstream sides of the first water passage and the second water passage, the downstream integrated water passage includes a junction at which passages respectively connected to the downstream sides of the first water passage and the second water passage join together, the downstream integrated water passage communicating on a downstream side thereof with a radiator;
- a connecting passage that connects the radiator and the pump;
- a third water passage that connects to the downstream integrated water passage at a location upstream of the junction;
- and
- a device provided adjacent to at least a part of the third water passage to exchange heat with water flowing in the third water passage.
Dependencies are inferred from the claim text.