Engine exhaust gas reflux apparatus

• US 4,345,572 A
• Filed: 12/18/1980
• Issued: 08/24/1982
• Est. Priority Date: 08/07/1980
• Status: Expired due to Term

• Current Assignee: Nagatoshi Suzuki, Sadaakira Araki, Soichi Kawazoe
• Original Assignee: Nagatoshi Suzuki, Sadaakira Araki, Soichi Kawazoe
• Inventors: Suzuki, Nagatoshi, Araki, Sadaakira, Kawazoe, Soichi
• Primary Examiner(s): Burns, Wendell E.
• Application Number:
  US06/217,749
• Time in Patent Office: 614 Days
• Field of Search: 123/568, 123/570, 123/571, 123/569, 60/279, 60/311, 60/275
• US Class Current: 123/568.11
• CPC Class Codes: F02B 1/04 with fuel-air mixture admission into cylinder
• CPC Class Codes: F02M 26/21 with EGR valves located at or near the connection to the intake system
• CPC Class Codes: F02M 26/35 with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
• CPC Class Codes: F02M 26/55 using vacuum actuators
• CPC Class Codes: Y10S 55/30 Exhaust treatment

Abstract

This patent specification discloses an engine exhaust gas reflux apparatus constructed so as to purify exhaust gas coming out of various engines mounted on vehicles or ships for preferably preventing NO_x from being discharged in the atmosphere.

The engine exhaust gas reflux apparatus has a technical construction which removes dust particles and impurities contained in exhaust gas by means of a dust collector installed at the discharge port of the exhaust manifold, draws purified exhaust gas into the intake manifold and lowers combustion temperature produced when the engine fuel burns to eliminate NO_x out of exhaust gas coming out of the exhaust manifold.

Claims

1. An engine exhaust gas reflux apparatus provided with an exhaust manifold, a dust collector linked to said exhaust manifold and a control valve and substantially comprising an electrostatic filter type discharge pipe connected to said dust collector and an intake manifold available for drawing exhaust gas from said electrostatic filter type discharge pipe thereby to preferably reduce NO_x contained in exhaust gas.

5. An engine exhaust gas reflux apparatus according to claim 1, 2 or 3 wherein a control valve fitted to said electrostatic filter type discharge pipe is substantially so constructed that the opening of the valve can be adjusted by means of a valve controller.

6. An engine exhaust gas reflux apparatus according to claim 1, 2 or 3 wherein a throttle for intake adjustment is substantially installed inside the intake inlet port of aforesaid intake manifold.

2. An engine exhaust gas reflux apparatus provided with an exhaust manifold, a cyclone type dust collecting device linked to said exhaust manifold, a high voltage generating circuit for the dust collecting action of said cyclone type dust collecting device and a control valve and substantially comprising an electrostatic filter type discharge pipe connected to said cyclone type dust collecting device and an intake manifold working to induce exhaust gas from said electrostatic filter type discharge pipe thereby to preferably reduce NO_x contained in exhaust gas.

3. An engine exhaust gas reflux apparatus provided with an exhaust manifold including two passages branched from a discharge port, a dust collector connected to one branched passage from the discharge port of said exhaust manifold, a exhaust gas leading pipe connected to the other branched passage from the discharge port of the exhaust manifold and a control valve and substantially comprising an electrostatic filter type discharge pipe linked to said dust collector and an intake manifold available for introducing exhaust gas from said electrostatic filter type discharge pipe thereby to preferably reduce NO_x contained in exhaust gas.

4. An engine exhaust gas reflux apparatus according to claim 3 wherein a dust collector is substantially installed in the other branched passage of discharge port of aforesaid exhaust manifold.