US3529588A - Ignition arrangement - Google Patents

Ignition arrangement Download PDF

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Publication number
US3529588A
US3529588A US766180A US3529588DA US3529588A US 3529588 A US3529588 A US 3529588A US 766180 A US766180 A US 766180A US 3529588D A US3529588D A US 3529588DA US 3529588 A US3529588 A US 3529588A
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US
United States
Prior art keywords
ignition
spark plug
engine
rotary piston
glow plug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US766180A
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English (en)
Inventor
Otto Beesch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19671551998 external-priority patent/DE1551998A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3529588A publication Critical patent/US3529588A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F02P15/001—Ignition installations adapted to specific engine types
    • F02P15/005—Layout of ignition circuits for rotary- or oscillating piston engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs

Definitions

  • the present invention relates to Ignition arrangements, and more particularly to ignition arrangments for igniting the fuelair mixture in rotary piston engines.
  • Rotary piston engines present a particular problem with respect to the ignition of the fuel-air mixture because as a result of condensate formation, or carbon deposition or accumulations of fuel and/or oil in the trochoidal bore the development of shorts or shunts at the spark plugs is a frequent occurrence in such engines.
  • this has necessitated the use of complicated and accordingly expensive ignition arrangements in such engines, includinghigh-voltage condensor ignition arrangements or the use of special dual-coil ignition arrangements with two spark plugs. Aside from the fact that these arrangements are complicated, as pointed out before. and are accordingly expensive, it is a fact that at extremely low temperatures they do not operate satisfactorily.
  • a more specific object of the invention is to provide such an ignition arrangement for use with rotary piston engines and which is simple in its construction and accordingly inexpensive to manufacture and sell.
  • An additional object of the invention is to provide such an ignition arrangement which improves the cold-starting behavior of rotary piston engines.
  • an ignition arrangement especially for igniting the fuel-air mixture in rotary piston engines.
  • which comprises spark plug means arranged to ignite the fuel-air mixture and electric preheating means proximal to the spark plug means and operable for preheating the latter and the circumambient region thereof.
  • a source of electrical energy is provided and connecting means is operative for connecting the source with either or both the spark plug means and the preheating means at the will of a user.
  • Spark plug means for the purposes at hand are of course well known, and the source of electrical energy may be the conventional battery employed for energizing such spark plug means.
  • the preheating means may be of any known suitable construction, for instance a glow plug or another heating element which preheats the spark plug and the circumambient region of the spark plug so that ignition will take place after only a few seconds even at extremely low temperatures.
  • a glow plug or another heating element which preheats the spark plug and the circumambient region of the spark plug so that ignition will take place after only a few seconds even at extremely low temperatures.
  • my novel ignition arrangement eliminates shunting or shorting of the spark plug and the objectionable oil carbon or oil depositlOnS.
  • the single figure is a diagram illustrating one example of an ignition system according to the present invention.
  • a conventional rotary piston engine of known construction is identified with reference numeral l.
  • Therotary piston is not shown because it is not essential for an understanding of the invention.
  • a spark plug 2 is associated with the rotarypiston engine 1.
  • a preheating means here illustrated diagrammatically as a conventional glow plug 3 although another suitable heating element may be substituted.
  • the glow plug 3 or analogous heating means is located close enough to the spark plug 2 so that the latter and the circumambient region of the spark plug 2 ill be subjected to heating when the glow plug is energized.
  • the position of the glow plug 3 with respect to the spark plug 2 is determined only by the consideration of effective heating of the latter and the circumambient region thereof; as far as the direction of rotation of the rotary piston of the rotary piston engine I is concerned, the location of the glow plug 3 is immaterial. In other words, it is immaterial whether the glow plug 3 is located upstream of or downstream of the spark plug 2 as seen with respect to the direction of rotation of the rotary piston.
  • a conventional starter battery is identified with reference numeral 6, a conventional starter with reference numeral 7 and the interrupter 8 and ignition coil 9 are conventional and are know from ignition coil systems used in conjunction with automobile engines.
  • Electrical conductors l0 connect the spark plug 2 with the ignition coil 9, the interrupter'8 and. ignition switch 4, the glow plug 3 with the ignition switch 4, and the starter 7 with the ignition switch 4.
  • a further conductor 10 connects the ignition switch 4 with the starter battery 6.
  • the ignition switch 4 is of the multi-position type and comprises in the illustrated embodiment a rotary contact 5 which can be moved between positions identified in the drawing with reference designations O. R. H and S.
  • the designation 0 stands for off.”
  • the designation R stands for running.”
  • the designation H stands for heating and S stands for start”.
  • the rotary contact-5 of the ignition switch 4 is of the multi-position type and comprises in ready well known-is turned from position 0 to the position H. This establishes a circuit connection between the starting battery 6 and the glow plug 3, energizing the same.
  • the rotary contact 5 is maintained in the position .H for a requisite period of time, for example approximately one minute, during which the glow plug 3 or analogous heating element is heatedand in turn heats the spark plug 2 and the circumambient region thereof. Subsequently, the contact 5 is turned to position 5 in which the glow plug 3 remains energized while additionally the spark plug 2 is electrically connected with the starter battery 6. In this position the rotary piston engine 1 will start reliably and rapidly even at extremely low ambient temperatures, owing to the preheating of the spark plug 2 and the fuel air mixture in the circumambient region of the spark plug 2.
  • ignition of the fuel-air mixture by the spark plug 2 may be temporarily facilitated by leaving the glow plug 3 energized until such time as the engine will run smoothly. This is accomplished by leaving the contact 5 of the ignition switch 4 in the position H until the engine runs smoothly, at which time the contact 5 is then turned in conventional manner to the position R.
  • An ignition arrangement for igniting the fuel-air mixture in rotary piston engines comprising a first electric ignition circuit including a glow plug for preheating and igniting said fuelair mixture when the rotary piston engine is cold; a second further comprising a source of electrical energy connectable with said first and second electric ignition circuit, respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US766180A 1967-10-11 1968-10-09 Ignition arrangement Expired - Lifetime US3529588A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671551998 DE1551998A1 (de) 1967-10-11 1967-10-11 Zuendanlage fuer Kreiskolbenmotoren

Publications (1)

Publication Number Publication Date
US3529588A true US3529588A (en) 1970-09-22

Family

ID=5676868

Family Applications (1)

Application Number Title Priority Date Filing Date
US766180A Expired - Lifetime US3529588A (en) 1967-10-11 1968-10-09 Ignition arrangement

Country Status (3)

Country Link
US (1) US3529588A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1578300A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1248779A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136657A (en) * 1976-10-21 1979-01-30 Nippondenso Co., Ltd. Electric control system for diesel engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5381836A (en) * 1976-12-26 1978-07-19 Nippon Soken Inc Rotary engine ignition system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136657A (en) * 1976-10-21 1979-01-30 Nippondenso Co., Ltd. Electric control system for diesel engine

Also Published As

Publication number Publication date
GB1248779A (en) 1971-10-06
FR1578300A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1969-08-14

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