Current generating system for a vehicle having an internal combustion engine

• US 6,210,822 B1
• Filed: 01/13/2000
• Issued: 04/03/2001
• Est. Priority Date: 06/26/1995
• Status: Expired due to Fees

• Current Assignee: Daimler AG (Mercedes-Benz Group AG)
• Original Assignee: Daimler Chrysler Company LLC (Stellantis NV)
• Inventors: Abersfelder, Gunter, Buchner, Helmut
• Primary Examiner(s): Maples, John S.
• Application Number:
  US09/482,055
• Time in Patent Office: 446 Days
• Field of Search: 429/19, 429/17, 429/12
• US Class Current: 429/411
• CPC Class Codes: B60R 16/03 for supply of electrical power to vehicle subsystems or for circuit arrangements for charging batteries H02J7/00
• CPC Class Codes: H02J 1/00 Circuit arrangements for dc mains or dc distribution networks
• CPC Class Codes: H02J 2300/30 The power source being a fuel cell
• CPC Class Codes: H02J 2310/46 for ICE-powered road vehicles

Abstract

In an electric generating arrangement for a motor vehicle driven by an internal combustion engine, a fuel cell is provided to generate electric energy for operating electric consuming devices. For supplying the fuel cell with fuel, hydrogen gas is cracked from the liquid fuel for the internal combustion engine, and the remaining fuel constituents are either burnt directly in the internal combustion engine, or returned as a liquid condensate into the fuel tank.

Claims

1. Electric generating arrangement for a motor vehicle driven by an internal combustion engine, said electric generating system comprising a fuel cell system fueled by fuel from a fuel tank used for the internal combustion engine and coupled to supply electric power to electric consuming devices of said vehicle.

2. Arrangement according to claim 1, further comprising:

apparatus for separating hydrogen from fuel used for the internal combustion engine;

a supply pipe for feeding the separated hydrogen to the fuel cell system; and

a disposal pipe for supplying remaining fuel constituents to one of the internal combustion engine and the fuel tank.

3. Arrangement according to claim 2, wherein the apparatus for separating hydrogen comprises a cracking system and an H₂-separating system, said cracking system chemically decomposing the fuel into hydrogen and a cracking gas residue of remaining fuel constituents, and said H₂-separating system, physically separating the hydrogen from the remaining fuel constituents.

4. Arrangement according to claim 3, wherein an intermediate H₂-storage device is provided in the supply pipe.

5. Arrangement according to claim 2, wherein an intermediate storage device for the remaining fuel constituents is provided in the disposal pipe.

6. Arrangement according to claim 2, further comprising:

a device for at least partially condensing remaining fuel constituents connected to the disposal pipe; and

at least one of a first pipe arranged between the fuel cell system and the fuel tank, for discharge of liquid constituents from said device; and

a second pipe arranged between the fuel cell system and the internal combustion engine, for discharge of gaseous constituents directly to the internal combustion engine.

7. Arrangement according to claim 1, further comprising a battery for starting the fuel cell system and/or a cracking system.

8. Electric generating arrangement for a motor vehicle having an internal combustion engine and a fuel tank which supplies fuel to the engine, said electric generating arrangement comprising:

a fuel cell coupled to supply electric current to electrical components of said vehicle;

reaction means for chemically decomposing said fuel into hydrogen and residual fuel constituents;

a hydrogen separating device coupled to receive said hydrogen and said residual fuel constituents from said reaction means, said hydrogen separating device being coupled to provide hydrogen to said fuel cell both by way of a direct connection, and indirectly by way of a first intermediate hydrogen storage vessel; and

a disposal line coupled to supply residual fuel constituents from said reaction means to at least one of said fuel tank and said internal combustion engine.

9. Arrangement according to claim 8, further comprising a second intermediate storage vessel coupled to receive said residual fuel constituents from said disposal line.

10. Arrangement according to claim 9, further comprising:

a first output line coupled to supply a liquid portion of said residual fuel constituents from said second intermediate storage vessel to said fuel tank; and

a second output line coupled to supply a gaseous portion of said residual fuel constituents from said second intermediate storage vessel to said internal combustion engine.

11. Arrangement according to claim 10, further comprising means for mixing said gaseous portion with fuel from said fuel tank.