US3875792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Installation for testing an electronically controlled fuel injection system in internal combustion engines
Assignee: Daimler Benz AG
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Filing: 1973-06-15
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Granted: 1975-04-08
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Expires: 1993-06-15
Abstract
Abstract An installation for testing an electronically controlled fuel injection system and/or an electronic ignition system in internal combustion engines, especially in motor vehicle internal combustion engines, in which the connections from the different influencing magnitudes and to the electromagnetically actuated injection valves are connected to an electronic control apparatus by means of a common multi-connection plug; a portable indicating apparatus is thereby connected between the control apparatus and the common plug with the aid of an adaptor plug whereby the voltages, picked up either directly or by way of voltage drops produced across low-ohmic resistors, are adapted to be fed to the indicating apparatus which is equipped with a number of light diodes which serve as function indicators of the corresponding values and locations of the failures or troubles.
Inventors
- 👤 Erich Krohn
- 👤 Manfred Natter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:17
CPC Classifications
F; F02; F02P; F02P17/00; F02D; F02D41/00; F02D41/30; F02M; F02M65/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
159 words
An installation for testing at least one of an electronically controlled fuel injection system and an ignition system in an internal combustion engine system wherein connections from sensor means sensing influencing magnitudes and from electromagnetically actuated injection valve means are connected to an electronic control means by way of a common multiconnection plug means, the installation comprising a portable indicating apparatus, and an adaptor plug means for connection between the electronic control means and the common multiconnection plug means, the adaptor plug means being responsive to at least the signals from the electronic control means to respective electromagnetically actuated injection valve means for providing output signals indicative thereof to the indicating apparatus, the indicating apparatus including a plurality of circuit means having light diode means, the circuit means being responsive to the electrical output signals from the adaptor plug means for lighting respective light diode means as an indication of the operation of respective electromagnetically actuated injection valve means.
Claim 2
Dependent Claim
159 words
An installation for testing at least one of an electronically controlled fuel injection system and an ignition system in an internal combustion engine system wherein connections from sensor means sensing influencing magnitudes and from electromagnetically actuated injection valve means are connected to an electronic control means by way of a common multiconnection plug means, the installation comprising a portable indicating apparatus, and an adaptor plug means for connection between the electronic control means and the common multiconnection plug means, the adaptor plug means being responsive to at least the signals from the electronic control means to respective electromagnetically actuated injection valve means for providing output signals indicative thereof to the indicating apparatus, the indicating apparatus including a plurality of circuit means having light diode means, the circuit means being responsive to the electrical output signals from the adaptor plug means for lighting respective light diode means as an indication of the operation of respective electromagnetically actuated injection valve means.
Claim 3
Dependent Claim
17 words
An installation according to claim 1, characterized in that the ignition system is an electronic ignition system.
Claim 4
Dependent Claim
25 words
An installation according to claim 1, characterized in that the electrical output signals are voltages which are directly picked up in the adaptor plug means.
Claim 5
Dependent Claim
42 words
An installation according to claim 1, characterized in that the adaptor plug means includes resistor means having a low ohmic value by means of which voltage drops are produced for purposes of enabling the pick-up of signals from the electronic control means.
Claim 6
Dependent Claim
71 words
An installation with suction air and cooling water temperature sensor means according to claim 1, characterized in that the indicating apparatus includes two further circuit means having threshold switching means and light diode means which are controlled by way of of the threshold switching means and which light up when the sensor means for sensing the suction air temperature and the cooling water temperature supply values outside the predetermined operating range.
Claim 7
Dependent Claim
22 words
An installation according to claim 5, characterized in that transfer resistances are provided for supplying the values to the threshold switching means.
Claim 8
Dependent Claim
15 words
An installation according to claim 5, characterized in that said values are indicated by interruptions.
Claim 9
Dependent Claim
58 words
An installation according to claim 5, characterized in that the indicating apparatus, in addition to the light diode means, includes a rotational speed measuring means which is controlled by the electrical output signals of the adaptor plug means corresponding to the injection pulses for the electromagnetically actuated injection valve means, as well as a fuel pressure measuring means.
Claim 10
Dependent Claim
28 words
An installation according to claim 8, characterized in that indicating apparatus includes a front plate and that the light diode means are arranged recessed in the front plate.
Claim 11
Dependent Claim
17 words
An installation according to claim 9, characterized in that the ignition system is an electronic ignition system.
Claim 12
Dependent Claim
25 words
An installation according to claim 10, characterized in that the electrical output signals are voltages which are directly picked up in the adaptor plug means.
Claim 13
Dependent Claim
42 words
An installation according to claim 10, characterized in that the adaptor plug means includes resistor means having a low ohmic value by means of which voltage drops are produced for purposes of enabling the pick-up of signals from the electronic control means.
Claim 14
Dependent Claim
58 words
An installation according to claim 1, characterized in that the indicating apparatus, in addition to the light diode means, includes a rotational speed measuring means which is controlled by the electrical output signals of the adaptor plug means corresponding to the injection pulses for the electromagnetically actuated injection valve means, as well as a fuel pressure measuring means.
Claim 15
Dependent Claim
28 words
An installation according to claim 1, characterized in that indicating apparatus includes a front plate and that the light diode means are arranged recessed in the front plate.
Claim 16
Dependent Claim
41 words
An installation according to claim 1, characterized in that the light diode means are connected to the adaptor plug means such that the light diode means are lighted in the rhythm of the actuation of the electromagnetically actuated injection valve means.
Claim 17
Dependent Claim
31 words
An installation according to claim 15, characterized in that the light diode means are lighted in intensity in accordance with the duration of actuation of respective electromagnetically actuated injection valve means.
Claim 18
Dependent Claim
37 words
An installation according to claim 1, characterized in that the circuit means further includes pulse amplifier means responsive to the electrical output signals of the adaptor plug means for supplying energizing pulses to the light diode means.
Claim 19
Dependent Claim
39 words
An installation according to claim 1, characterized in that a light diode means is coordinated with a respective electromagnetically activated injection valve of the injection valve means for lighting in accordance with the operation of the respective injection valve.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |