# US 10,865,673 B2 · Apparatus for discharging water in exhaust fluid and silencer for fuel cell vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,673 B2 - Document ID: US10865673B2 - Status: Granted - Kind: B2 - Application number: 16/843,167 - Filed: 2020-04-08 - Published: 2020-07-23 - Granted: 2020-12-15 - Earliest claimed: 2016-12-15 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Hyundai Motor Company; Kia Motors Corporation - Inventors: Sung Wook Na; Hun Woo Park; Myung Ju Jung; Hyun Young Park; Ju Chan Jang; Jun Ho Jang - Web page: https://patentgrep.com/patent/US10865673B2 ## CPC - F01N 3/005: {for draining or otherwise eliminating condensates or moisture accumulating in the apparatus (F01N3/02 takes precedence)} - B60L 50/72: Constructional details of fuel cells specially adapted for electric vehicles - B60L 2270/12: of exhaust - B60L 2270/142: acoustic - F01N 2570/22: Water or humidity - Y02E 60/50: Fuel cells - Y02T 10/12: Improving ICE efficiencies - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - Y02T 90/12: Electric charging stations - Y02T 90/16: Information or communication technologies improving the operation of electric vehicles - Y02T 90/40: Application of hydrogen technology to transportation, e.g. using fuel cells - 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) - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An apparatus for discharging water in exhaust fluid is disclosed. The apparatus includes a body having an inlet disposed on an exhaust path for exhausting exhaust fluid exhausted from a fuel cell stack to the outside and through which the exhaust fluid is introduced, an outlet communicating with the outside, an interior space allowing the inlet and the outlet to communicate each other, and a discharge passage communicating with the outside to discharge water in the interior space. The apparatus further includes a first resistance unit disposed on a flow path along which the exhaust fluid flows in the interior space and having first fine holes through which at least a portion of the exhaust fluid passes, and a second resistance unit disposed on a discharge path along which the water in the interior space is discharged through the discharge passage and having second fine holes through which the water passes. ## Claims ### Claim 1 A silencer for a fuel cell vehicle, comprising: a main body having an inlet disposed on an exhaust path for exhausting exhaust fluid exhausted from a fuel cell stack to an outside of the vehicle and through which the exhaust fluid is introduced, an outlet communicating with the outside, and an interior space allowing the inlet and the outlet to communicate each other; a first filter disposed on a flow path along which the exhaust fluid flows in the interior space of the main body, separating the interior space into a first space that is adjacent to the inlet and a second space that is adjacent to the outlet, and having first fine holes through which at least a portion of the exhaust fluid passes from the first space to the second space, wherein the first fine holes are sized to provide a resistance against passage of water in the exhaust fluid such that at least a portion of the water in the exhaust fluid is separated from the exhaust fluid while the exhaust fluid passes through the first fine holes; and a noise absorbing unit provided in the second space to reduce noise by the exhaust fluid. ### Claim 2 (depends on 1) The silencer of claim 1, wherein the main body further includes: a discharge passage communicating with the outside to discharge the water in the interior space. ### Claim 3 (depends on 2) The silencer of claim 2, further comprising: a second filter disposed on a discharge path along which the water in the interior space is discharged through the discharge passage and having second fine holes through which the water passes, wherein the second fine holes are sized to provide a resistance against passage of the water when the water passes through the second fine holes. ### Claim 4 (depends on 3) The silencer of claim 3, wherein the second fine holes are sized to allow passage of water when a pressure which the exhaust fluid applies to the water towards the discharge passage is a reference pressure or higher. ### Claim 5 (depends on 3) The silencer of claim 3, further comprising: an upper support connected to at least one of inner surfaces of the main body to support an upper side of the first filter, and a lower support connected to at least one of the inner surfaces of the main body to support a lower side of the first filter. ### Claim 6 (depends on 5) The silencer of claim 5, wherein the lower support includes an extension extending towards the outlet in a direction away from the inlet, wherein the first space includes: a storage space defined by the extension and at least one of the inner surfaces of the main body which faces the extension, wherein the discharge passage is provided on a side that is close to the storage space, and wherein the water in the interior space is stored in the storage space before being discharged through the discharge passage. ### Claim 7 (depends on 6) The silencer of claim 6, further comprising: a baffle unit extending in a direction crossing a flow of the exhaust fluid in the second space to induce collision with the water in the exhaust fluid, wherein the extension has a connection hole allowing the water dropping to the lower side due to the collision to be introduced into the storage space.