| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cooling system for a hybrid vehicle, which can sufficiently cool EGR gas circulating in an EGR cooler and thereby can sufficiently achieve effects such as a reduction in NOx or an improvement in fuel consumption due to EGR reflux. <P>SOLUTION: An EGR passage 10, which connects the exhaust passage 6 of an engine 1 with an air intake passage 3, is provided with a first EGR cooler 12, and also a second EGR cooler 13 downstream side of the first EGR cooler 12. Without connecting these EGR coolers 12 and 13 serially to other coolers, first cooling water for an engine cooling system is directly circulated to the first EGR cooler 12, and second cooling water for a hybrid equipment cooling system, which is lower in temperature than the first cooling water, is circulated directly to the second EGR cooler 13, thereby cooling EGR gas in two stages. <P>COPYRIGHT: (C)2013,JPO&INPIT |
