# US 10,865,674 B2 · Exhaust gas heat exchanger capable of controlling cooling performance

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- Number: US 10,865,674 B2
- Document ID: US10865674B2
- Status: Granted
- Kind: B2
- Application number: 16/466,744
- Filed: 2017-09-26
- Published: 2020-03-05
- Granted: 2020-12-15
- Earliest claimed: 2016-12-19
- Assignees: Korens Co., Ltd.; Bmw AG
- Applicants: Korens Co., Ltd.; Bmw AG
- Inventors: Hyung Geun Cho
- Web page: https://patentgrep.com/patent/US10865674B2

## CPC

- F01N 3/0205: {using heat exchangers}
- F02M 26/24: with two or more coolers
- F01N 3/043: {without contact between liquid and exhaust gases}
- F01N 13/08: Other arrangements or adaptations of exhaust conduits {(pipes, joints or supports therefor in general F16L; collecting or removing exhaust gases of vehicle engines in workshops B08B15/00, on highways E01C1/005)}
- F01P 3/12: Arrangements for cooling other engine or machine parts
- F02D 9/04: concerning exhaust conduits (throttle valves, or arrangements thereof in conduits F02D9/08)
- F02M 26/25: with coolers having bypasses
- F02M 26/26: characterised by details of the bypass valve
- F02M 26/28: with liquid-cooled heat exchangers
- F28D 1/05333: {with multiple rows of conduits or with multi-channel conduits (F28D1/05341 takes precedence)}
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F01P: COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; {cooling of gas-turbine engines F02C7/12}; heat exchange in general, radiators F28)
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)

## Abstract

The present invention relates to an exhaust gas heat exchanger capable of controlling the cooling performance. The exhaust gas heat exchanger includes: a cooler through which cooling water flows and in which a plurality of gas tubes is provided to allow exhaust gas to flow; an intake and exhaust block including an intake part, a supply line, a discharge line, a bypass line, and a first flap; a U-turn block including an inflow part, a re-cooling line, a release line, and a second flap; and an air duct.

## Claims

### Claim 1

An exhaust gas heat exchanger comprising:
a cooler through which cooling water flows and in which a plurality of gas tubes is provided to allow exhaust gas to flow;
an intake and exhaust block including an intake part to which an exhaust gas pipe for supplying exhaust gas is connected, a supply line for communicating first ends of some of the plurality of gas tubes with the intake part, a discharge line for communicating first ends of the remaining tubes of the plurality of gas tubes with outside, a bypass line for bypassing exhaust gas entering from the intake part to the outside, and a first flap for blocking selectively any one line of the supply line and the bypass line;
a U-turn block including an inflow part into which exhaust gas discharged through second ends of some of the plurality of gas tubes flows, a re-cooling line for communicating second ends of the remaining tubes of the plurality of gas tubes with the inflow part, a release line for discharging exhaust gas entering from the inflow part to the outside, and a second flap for blocking selectively any one line of the re-cooling line and the release line; and
an air duct for guiding exhaust gas to the discharge line, the exhaust gas being discharged through the release line,
wherein, a supply partition having a supply hole is provided in the supply line, a bypass partition having a bypass hole is provided in the bypass line, the first flap is rotatably mounted on the intake and exhaust block and is operated to cover the supply hole or the bypass hole depending on a rotational angle thereof, a re-cooling partition having a re-cooling hole is provided in the re-cooling line, a release partition having a release hole is provided in the release line, the second flap is rotatably mounted on the U-turn block and is operated to cover the re-cooling hole or the release hole depending on a rotational angle thereof, and outlets of the discharge line and the bypass line are integrally formed into a single pipe that is divided by a discharge partition.

### Claim 2 (depends on 1)

The exhaust gas heat exchanger of claim 1, wherein number of the gas tubes connected to an outlet of the re-cooling line is larger than number of the gas tubes connected to an outlet of the supply line.