| US 7,493,891 B2 | ||
| Internal combustion engine | ||
| Takeo Shirabe, Nishikamo-gun (Japan); and Tsunero Hamada, Iwata (Japan) | ||
| Assigned to Toyota Jidosha Kabushiki Kaisha, Toyota (Japan); and Yamaha Hatsudoki Kabushiki Kaisha, Iwata-shi (Japan) | ||
| Filed on May 14, 2007, as Appl. No. 11/798,428. | ||
| Claims priority of application No. 2006-136895 (JP), filed on May 16, 2006. | ||
| Prior Publication US 2007/0266967 A1, Nov. 22, 2007 | ||
| Int. Cl. F02B 15/00 (2006.01); F02B 15/02 (2006.01) | ||
| U.S. Cl. 123—432 [123/193.3] | 18 Claims |
| 1. An internal combustion engine comprising:
a combustion chamber;
a secondary air passage located above the combustion chamber;
an exhaust passage that communicates with the combustion chamber;
a first water jacket that is located between the exhaust passage and the secondary air passage; and
an intake passage that communicates with the combustion chamber to conduct intake air into the combustion chamber,
wherein the secondary air passage is located between the intake passage and the exhaust passage.
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