Method and apparatus for introduction of a fluid medium into working space of an internal combustion engine

• US 4,563,982 A
• Filed: 03/12/1984
• Issued: 01/14/1986
• Est. Priority Date: 03/12/1983
• Status: Expired due to Fees

• Current Assignee: FEV Forschungsgesellschaft Fur Energietechnik und Verbrennungsmotoren mbH
• Original Assignee: FEV Forschungsgesellschaft Fur Energietechnik und Verbrennungsmotoren mbH
• Inventors: Pischinger, Franz, Sollner, Robert
• Primary Examiner(s): Cross, E. Rollins
• Application Number:
  US06/588,522
• Time in Patent Office: 673 Days
• Field of Search: 123/1 A, 123/25 E, 123/527, 123/25 R, 123/25 A, 123/DIG. 12, 123/525
• US Class Current: 123/1.00A
• CPC Class Codes: F02B 1/04 with fuel-air mixture admission into cylinder
• CPC Class Codes: F02M 25/00 Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding secondary air to fuel-air mixture F02M23/00; adding exhaust gases F02M26/00; fuel-injection apparatus operating simultaneously on two or more fuels or on a liquid fuel and another liquid F02M43/00

Abstract

A method and apparatus for introduction of a fluid or liquid medium into working or operating chamber of an internal combustion engine is disclosed. For the purpose and object of reduction of nitric oxide emission as well as for an improvement of the efficiency there is proposed with a method and apparatus for introduction of the fluid or liquid medium into the working or operating chamber of an internal combustion engine operated with gaseous fuels to admix the fluid continuously or intermittently as to the gaseous fuel and subsequently to blow-in the fuel or power gas/fluid or liquid mixture into the working or operating chamber of the internal combustion engine under the pressure of the fuel or power gas. Hereby there can be utilized or employed advantageously besides the water also alcohol and alcohol/water mixtures, which means media with bound OH-groups.

Claims

1. A method for introduction of the fluid medium into a working combustion chamber of an internal combustion engine operated with gaseous fuels including a power gas rather than liquid fuel, comprising the steps of admixing the fluid medium to the gaseous fuel alone before combustion procedure at least intermittently whereby feeding of air supply occurs separately in the combustion chamber, then thereafter blowing-in a power-gas/fluid medium mixture combined therewith specifically during inner mixture formation in the working combustion chamber, said flowing-in occurring under the pressure of the power gas for reduction of NO_x -emission;

and

providing bound OH-groups in the fluid medium being admixed to the gaseous fuel, the fluid medium being selected from a group including water, alcohol and also employing alcohol/water mixtures as the fluid medium.

2. A method according to claim 1 wherein the said employing of alcohol/water mixture includes a water proportion of 30 to 70 volume percentage.

3. A method according to claim 1 wherein there is provided an alcohol/water mixture specifically in a range of 45 to 55 volume percentage water proportion.

4. A method according to claim 1 including the step of employing water refined as fluid medium being taken from the community water supply network.

5. A method according to claim 1 which includes employing fluid medium used in the form of alcohol having impurities determined by production thereof.

6. A method according to claim 5 in which the providing of fluid medium in the form of alcohol includes using crude methanol.

7. A method according to claim 1 comprising the step of regulating the fluid volume being admixed to the gaseous fuel by regulation of said fluid volume at least dependent upon momentary gas consumption, dependent upon a characteristic structural member temperature, particularly dependent upon a signal for detecting of knock intensity therewith.

8. A method according to claim 1 comprising the steps of undertaking the regulating of fluid through-passage obtained from magnitudes of at least one from a group of operating conditions including the opening duration of the fluid supply with cycled regulation, by the pressure difference between the fluid- and gas system, by throttling of the fluid supply.

9. A method according to claim 1 including the step of interrupting fluid supply with standing, running-out as well as non-operationally warm internal combustion engines, whereby there is first a shutting-off of the fluid supply upon turning-off in a sequence regulation and subsequently after a predetermined defined time there is turning-off of the engine itself.

10. A method according to claim 1 including a step of maintaining fluid supply pressure above the supply pressure of gas supply.

12. An apparatus according to claim 1 which further includes a supply line to the dosing tube in flow direction having in sequence one after another therewith an adjustable pressure reducing valve, a magnetic shut off valve for interruption of the fluid supply dependent upon a safety regulation unit, a regulator valve for regulation of the fluid quantity to be added dependent upon said regulation unit and a check valve therewith.

13. An apparatus according to claim 12 wherein said regulation unit is regulated by a signal of a measuring chain calibrated-phase-changer receiving and detecting at least one of conditions including pressure and acceleration as well as being installed for detection of knock intensity.

14. An apparatus according to claim 12 in which said regulator valve is constructed as an adjustable throttle with continuous fluid supply.

15. An apparatus according to claim 12 with which said regulator valve is constructed as a cycled valve with intermittent fluid supply.

16. An apparatus according to claim 12 in which said pressure reducing valve is a differential pressure regulator.

11. An apparatus to introduce fluid medium into a working combustion chamber of an internal combustion engine operated with gaseous fuel including a power gas rather than liquid fuel subject to admixing of fluid medium to the gaseous fuel alone before combustion procedure at least intermittently whereby feeding of air supply occurs separately in the combustion chamber and then thereafter the power gas/fluid medium mixture combined is blown therewith specifically during inner mixture formation in the working combustion chamber under the pressure of the power gas for reduction of NO_x -emission via an arrangement comprising an inlet valve including a cylindrical configuration in a seat region of said inlet valve as well as a gas supply pipe having a flow direction therein, and a dosing tube arranged for feeding and supplying of the fluid medium into the gas supply tube in flow direction shortly before said inlet valve.