Title:
HEAT EXCHANGE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/194012
Kind Code:
A1
Abstract:
This heat exchange system is provided with, in an exhaust air passage: a heat exchange passage provided with a heat exchanger which exchanges heat between exhaust air and a liquid; a bypass passage which bypasses the heat exchanger; and a first flow rate adjustment mechanism which adjusts an exhaust air flow rate in the heat exchange passage and the bypass passage. The heat exchange system is further provided with: an exhaust air reflux passage in which the exhaust air is returned from the outlet side of the heat exchanger in the heat exchange passage to an intake passage of an engine; a second flow rate adjustment mechanism which adjusts the amount of the exhaust air to be returned; and a control unit which controls the first flow rate adjustment mechanism and the second flow rate adjustment mechanism. The control unit closes the bypass passage and causes the exhaust air to flow to an underfloor catalyst through the heat exchange passage during a warm-up operation of the engine, and causes the exhaust air having passed through the heat exchanger to flow to the exhaust air reflux passage upon completion of the warm-up operation. The heat exchange system is still further provided with: a first liquid circulation passage including an engine cooling flow channel as a part of the passage; and a second liquid circulation passage which is independent of the engine cooling flow channel and through which the liquid is circulated in the heat exchanger.
Inventors:
NAGAI HIROYUKI (JP)
MIZOGUCHI SHINICHIROU (JP)
KOSHIJIMA MASASHI (JP)
MIZOGUCHI SHINICHIROU (JP)
KOSHIJIMA MASASHI (JP)
Application Number:
PCT/IB2019/000336
Publication Date:
October 01, 2020
Filing Date:
March 22, 2019
Export Citation:
Assignee:
NISSAN MOTOR (JP)
RENAULT SAS (FR)
RENAULT SAS (FR)
International Classes:
F01N5/02; F02M26/28
Foreign References:
| JP2009138615A | 2009-06-25 | |||
| JP2018127915A | 2018-08-16 | |||
| FR2948421A1 | 2011-01-28 |
Attorney, Agent or Firm:
GOTOH & PARTNERS et al. (JP)
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