INTAKE AIR HEATER FOR AN AIR-COMPRESSING INJECTION INTERNAL COMBUSTION ENGINE

• US 3,656,465 A
• Filed: 10/28/1970
• Issued: 04/18/1972
• Est. Priority Date: 10/29/1969
• Status: Expired due to Term

• Current Assignee: Gerhard Frankle
• Original Assignee: Gerhard Frankle
• Inventors: Frankle, Gerhard
• Primary Examiner(s): Smith, Al Lawrence
• Application Number:
  US05/084,633
• Time in Patent Office: 538 Days
• Field of Search: 123/179H,179G,179R,122G,198D,198DB
• US Class Current: 123/179.21
• CPC Class Codes: F02B 1/04 with fuel-air mixture admission into cylinder
• CPC Class Codes: F02B 29/00 Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
• CPC Class Codes: F02N 19/04 by heating of fluids used in engines
• CPC Class Codes: F02N 19/06 by heating of combustion-air by flame generating means, e.g. flame glow-plugs
• CPC Class Codes: F15C 1/002 for controlling engines, turbines, compressors (starting, speed regulation, temperature control or the like) control of internal-combustion piston engines F02D; of turbines F01D, F02C; of fans F04D27/00; speedometers G01P
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A suction air heater for an air-compressing injection-type internal combustion engine which includes a spark plug and fuel injection nozzle arranged in an air suction pipe and an electric motor driving a fuel pump; an oil pressure switch controlling the operation of the heater is provided in the internal combustion engine which assures that energy is supplied to the electric motor when the engine is running; a temperature-dependent switch is series-connected with the oil pressure switch for selectively opening or closing the circuit of the electric motor while a starter switch may be connected in parallel with the oil pressure switch.

Claims

1. An intake air heater system for an air-compressing injection internal combustion engine which includes a fuel injection nozzle arranged in a suction air pipe and a spark plug as well as a feed pump driven by an electric motor, characterized in that an oil pressure switch means operable to control the operation of the suction air heater is arranged at the internal combustion engine and is connected in a control circuit means for the electric motor to ensure a current supply to said electric motor with a running internal combustion engine.

2. An intake air heater according to claim 1, characterized in that said oil pressure switch means operates in dependence of the pressure in the oil circulatory system of the engine.

3. An intake air heater according to claim 2, characterized in that a transmitter means controlled in dependence on temperature is series-connected with the oil pressure switch means, said transmitter means being operable to selectively open or close the control circuit means to the electric motor.

4. An intake air heater according to claim 3, characterized in that the oil pressure switch means is connected in parallel to an electric starter switch means of the internal combustion engine.

5. An intake air heater according to claim 1, characterized in that a transmitter means controlled in dependence on temperature is series-connected with the oil pressure switch means, said transmitter means being operable to selectively open or close the control circuit means to the electric motor.

6. An intake air heater according to claim 1, characterized in that the oil pressure switch means is connected in parallel to an electric starter switch means of the internal combustion engine.

7. An intake air heating system for an air-compressing internal combustion engine with fuel injection, which includes a fuel pump for an Injection nozzle arranged in an air suction pipe of the engine, spark plug means for igniting the injected fuel and a control circuit for an electric motor drivingly connected with the fuel pump, characterized in that the control circuit includes an oil pressure switch means operable to close the circuit and thus provide electrical energy for the electric motor in the presence of a predetermined pressure in the oil circulatory system of the engine.

8. A system according to claim 7, characterized in that said circuit includes, connected in series, a switch operated by an ignition lock, said oil pressure switch means and a further switch means selectively opened or closed in dependence on temperature.

9. A system according to claim 8, characterized in that a switch actuated by a starter means is connected in parallel with the oil pressure switch means.