GB1328939A - Method and apparatus for checking the compression of internal combustion engines - Google Patents
Method and apparatus for checking the compression of internal combustion enginesInfo
- Publication number
- GB1328939A GB1328939A GB3727272A GB3727272A GB1328939A GB 1328939 A GB1328939 A GB 1328939A GB 3727272 A GB3727272 A GB 3727272A GB 3727272 A GB3727272 A GB 3727272A GB 1328939 A GB1328939 A GB 1328939A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulses
- compression
- values
- engine
- current
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
- G01L23/085—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by measuring fluctuations of starter motor current or of battery voltage
Abstract
1328939 Measuring compression in IC engines ROBERT BOSCH GmbH 10 Aug 1972 [11 Aug 1971] 37272/ 72 Heading G1N The compression in the combustion chambers of an IC engine is determined by measuring the torque required from the engine starter motor to turn the engine over, the torque being proportional to motor current and indicated by the voltage drop across the battery terminals. As shown Fig. 2, the voltage pulses at terminal 11 of battery 10, representing the current pulses in starter motor 27, are fed through a low pass filter 12 to zero-voltage switch 15 which produces trigger pulses for a counter 17, enabling a unit 16 to store the peak values of the measured pulses. These values are fed to a recorder 18 and a comparator 19 which energizes a lamp 24 or 25 depending on the variation in peak values. The system is initially delayed for a short time by elements 4, 21, 20. In another embodiment, the starter current peak value s are compared with pre-set maximum and minimum values, which may be automatically modified in accordance with e.g. temperature.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19712140172 DE2140172A1 (en) | 1971-08-11 | 1971-08-11 | PROCEDURE AND EQUIPMENT FOR INSPECTION OF COMBUSTION MACHINERY |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1328939A true GB1328939A (en) | 1973-09-05 |
Family
ID=5816420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3727272A Expired GB1328939A (en) | 1971-08-11 | 1972-08-10 | Method and apparatus for checking the compression of internal combustion engines |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2140172A1 (en) |
| FR (1) | FR2150033A5 (en) |
| GB (1) | GB1328939A (en) |
| IT (1) | IT963891B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4404640A (en) | 1981-01-09 | 1983-09-13 | W. R. Grace & Co. | Grinding mill monitoring instrumentation |
| US4586146A (en) * | 1981-02-27 | 1986-04-29 | W. R. Grace & Co. | Grinding mill control system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4337720A1 (en) * | 1993-11-05 | 1995-05-18 | Bayerische Motoren Werke Ag | Device for evaluating the compression of a multi-cylinder internal combustion engine |
-
1971
- 1971-08-11 DE DE19712140172 patent/DE2140172A1/en active Pending
-
1972
- 1972-08-09 FR FR7228818A patent/FR2150033A5/fr not_active Expired
- 1972-08-10 IT IT2807572A patent/IT963891B/en active
- 1972-08-10 GB GB3727272A patent/GB1328939A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4404640A (en) | 1981-01-09 | 1983-09-13 | W. R. Grace & Co. | Grinding mill monitoring instrumentation |
| US4586146A (en) * | 1981-02-27 | 1986-04-29 | W. R. Grace & Co. | Grinding mill control system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2140172A1 (en) | 1973-02-22 |
| IT963891B (en) | 1974-01-21 |
| FR2150033A5 (en) | 1973-03-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |