GB653912A - Improvements in or relating to electrical apparatus for indicating cyclically varying phenomena in an internal combustion power plant - Google Patents
Improvements in or relating to electrical apparatus for indicating cyclically varying phenomena in an internal combustion power plantInfo
- Publication number
- GB653912A GB653912A GB13038/48A GB1303848A GB653912A GB 653912 A GB653912 A GB 653912A GB 13038/48 A GB13038/48 A GB 13038/48A GB 1303848 A GB1303848 A GB 1303848A GB 653912 A GB653912 A GB 653912A
- Authority
- GB
- United Kingdom
- Prior art keywords
- engine
- switch
- sweep
- oscillograph
- power plant
- 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
Links
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
- F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
- F02P17/02—Checking or adjusting ignition timing
- F02P17/04—Checking or adjusting ignition timing dynamically
- F02P17/08—Checking or adjusting ignition timing dynamically using a cathode-ray oscilloscope
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/12—Testing internal-combustion engines by monitoring vibrations
Abstract
653,912. Testing ignition and working conditions. SPERRY CORPORATION. May 12, 1948, No. 13038. Convention date, May 15, 1947. [Classes 7(ii) and 7(iv)] [Also in Groups XXXVI and XXXVIII] For indicating cyclically varying phenomena in an internal combustion power plant by means of a cathode ray oscillograph switching devices are provided, one for each engine of the power plant, that have as many switching positions as there are engine cylinders, and each of which serves to select for display, or for display in a particular portion of the sweep path of the electron beam, the phenomena associated with the firing period of one or another of the engine cylinders. As shown the oscillograph 39 indicates the primary magneto voltage or the vibration pick-up voltage of one or more aircraft engines as ordinates and timing' degrees as abscissa, the abscissa being synchronised' with the actual rotational position of the engine crankshaft by means of a trip action sweep generator circuit controlled by means of individual engine driven switches. Connections are shown to one of the magnetos 20 of a dual magneto power plant, the voltage across the primary 23 of which is applied through switches 40, 34 to the vertical deflection plates 48, 49 of the oscillograph 39. Vibration pick-ups 50, 51 are mounted on each cylinder and the voltage output is also applied to the plates 48, 49 through the switches 40, 34. A multiple selector point engine driven switch 32 is individually provided for each engine and has as many selector points as there are cylinders for the engine. This switch is used to trigger a time-base circuit 38 which initiates a time-base sweep only when effective contact is made with a predetermined selector point. The switch 32 is connected to a section 33 of the switch 34 which selects the point in the engine timing diagram at which the sweep is initiated and thus determines the initial point of the timing diagram to appear on the screen. The other section 35 of the switch 34 selects any chosen cylinder vibration pick-up for observation, and the section 33 thus determines the portion of the engine diagram to appear on the oscillograph screen. The speed of the sweeping beam may be varied so that it traverses a sweep across the screen once per whole cycle or per fraction of a cycle as desired, by varying the time constants of the sweep circuit 38, e.g. by switching a capacitance in or out by a push-button 37 actuating a switch 37<SP>1</SP>. The sections 33, 35 of the switch 34 may be locked together by means of a friction coupling or a pin coupling so that both sections may be rotated simultaneously to observe a particular function (e.g. combustion), of each cylinder in turn. The switch 40 is used to select for observation the desired engine of the aircraft and the condition for which the performance of the engine is to be tested and analysed. By means of leads 41 the switch 40 is connected to any desired magneto primary through a protective resistance 42 to earth. Any departure from normal operation of the ignition system alters the shape of the voltage-time curve on the oscillograph. By observing these characteristic patterns it is possible to detect and locate faults such as fouled spark plug, open or short circuit in ignition system or magneto condensers, improper breaker adjustment, setting of spark plug gaps, or low output magnetos. Specification 598,360, [Group XXXIX], is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US748286A US2518427A (en) | 1947-05-15 | 1947-05-15 | Engine power analyzer |
Publications (1)
Publication Number | Publication Date |
---|---|
GB653912A true GB653912A (en) | 1951-05-30 |
Family
ID=25008801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13038/48A Expired GB653912A (en) | 1947-05-15 | 1948-05-12 | Improvements in or relating to electrical apparatus for indicating cyclically varying phenomena in an internal combustion power plant |
Country Status (5)
Country | Link |
---|---|
US (1) | US2518427A (en) |
DE (1) | DE945796C (en) |
FR (1) | FR966225A (en) |
GB (1) | GB653912A (en) |
NL (1) | NL76862C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2122350A (en) * | 1982-05-12 | 1984-01-11 | Avl Verbrennungskraft Messtech | Checking valve clearances on a piston engine |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2736192A (en) * | 1956-02-28 | ryerson etal | ||
NL76862C (en) * | 1947-05-15 | 1954-08-16 | ||
US2679746A (en) * | 1949-10-31 | 1954-06-01 | Phillips Petroleum Co | Detonation analyzer |
US2651195A (en) * | 1950-02-21 | 1953-09-08 | Ibm | Apparatus for indicating variable conditions in machines |
US2787760A (en) * | 1952-12-19 | 1957-04-02 | Sperry Rand Corp | Automotive engine analyzer |
US2842956A (en) * | 1953-12-28 | 1958-07-15 | Pure Oil Co | Apparatus for detecting uncontrolled combustion within internal combustion engines |
US2959732A (en) * | 1954-10-05 | 1960-11-08 | Jr John E Lindberg | Engine analyzer employing radiofrequency oscillations |
US2867766A (en) * | 1955-05-25 | 1959-01-06 | Sperry Rand Corp | Engine analyzer system |
US3056918A (en) * | 1955-10-14 | 1962-10-02 | Lindberg | Engine analyzer employing cathoderay tube |
US2974274A (en) * | 1955-12-13 | 1961-03-07 | Lindberg | Secondary-emission cathode-ray tube and engine analyzer employing the same |
US2985011A (en) * | 1956-07-16 | 1961-05-23 | Walker Brooks | Micro-timer |
US2875402A (en) * | 1956-11-09 | 1959-02-24 | Heyer Ind Inc | Trace brightening circuit |
US3289461A (en) * | 1963-12-05 | 1966-12-06 | Phillips Petroleum Co | Detonation meter |
US3572103A (en) * | 1967-01-06 | 1971-03-23 | Marquette Corp | Analyzer for multi-cylinder internal combustion engine having means for identifying individual cylinders |
US3540262A (en) * | 1967-07-10 | 1970-11-17 | Sinclair Research Inc | Knock and rumble detector for internal combustion engines |
US4091656A (en) * | 1977-05-12 | 1978-05-30 | Avco Corporation | Detonation analyzer for piston engine |
US20100127894A1 (en) * | 2008-11-24 | 2010-05-27 | Honeywell International Inc. | Magneto sensor for an aircraft ignition system |
CN108051217B (en) * | 2017-11-30 | 2019-09-17 | 四川泛华航空仪表电器有限公司 | The online fault detection method of aero-engine ignition driver |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2133437A (en) * | 1933-03-30 | 1938-10-18 | Dodds Edwin Mathieson | Apparatus for indicating the variation of one quantity relatively to another quantity |
US2085203A (en) * | 1935-08-21 | 1937-06-29 | Socony Vacuum Oil Co Inc | Engine indicator |
US2082030A (en) * | 1936-05-26 | 1937-06-01 | Rca Corp | Phase indicator |
US2355363A (en) * | 1942-09-29 | 1944-08-08 | Allen B Dumont Lab Inc | Cathode-ray ignition analyzer |
US2366355A (en) * | 1942-12-22 | 1945-01-02 | Rca Corp | Indicating device |
US2430154A (en) * | 1943-06-26 | 1947-11-04 | Rca Corp | Oscillograph timing circuit |
GB598360A (en) * | 1944-01-10 | 1948-02-17 | Sperry Gyroscope Co Inc | Improvements in and relating to vibration pick-up devices and to systems and apparatus utilising them |
NL76862C (en) * | 1947-05-15 | 1954-08-16 |
-
0
- NL NL76862D patent/NL76862C/xx active
-
1947
- 1947-05-15 US US748286A patent/US2518427A/en not_active Expired - Lifetime
-
1948
- 1948-05-12 GB GB13038/48A patent/GB653912A/en not_active Expired
- 1948-05-14 FR FR966225D patent/FR966225A/en not_active Expired
-
1950
- 1950-10-03 DE DES20346A patent/DE945796C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2122350A (en) * | 1982-05-12 | 1984-01-11 | Avl Verbrennungskraft Messtech | Checking valve clearances on a piston engine |
Also Published As
Publication number | Publication date |
---|---|
FR966225A (en) | 1950-10-04 |
DE945796C (en) | 1956-07-19 |
US2518427A (en) | 1950-08-08 |
NL76862C (en) | 1954-08-16 |
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