Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1992-11-23
1995-05-09
Pellinen, A. D.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
307103, 307130, H02J 100
Patent
active
054143047
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a device for suppressing voltage drops.
More particularly it relates to a device for suppressing voltage drops in apparatuses which can be connected with a battery via at least two lines for their voltage supply.
The control or regulating of the engine of a motor vehicle and also the control of anti-lock systems (ABS) or drive slip regulators (ASR) is conventionally effected at present by means of a control apparatus. The control apparatus is supplied with voltage by the battery of the motor vehicle. Since special demands are made on the regularity of this voltage a separate voltage regulator is usually associated with the control apparatus.
In a control apparatus voltage supply described in DE-P 40 41 620, which does not have a prior publication date, a first input of the control apparatus is permanently supplied with voltage via a first line. There is no provision for interrupting the voltage supply when the engine is switched off.
A second input of the control apparatus is supplied by connected battery voltage via a second line. The ignition switch is connected between the battery and the control apparatus input. When the engine is switched off, the ignition switch is opened and voltage is no longer applied to the corresponding control apparatus input.
Such a voltage supply has proven advantageous because a motor vehicle has different consumers, some of which must be supplied with voltage constantly even when the engine is switched off, while others must be supplied with voltage only during operation.
However, the arrangement described in DE-P 40 41 620 has the disadvantage that the permanent voltage supply or connected battery voltage is temporarily interrupted in an impermissible manner during disturbances, e.g. temporary voltage drops which can occur during rough operation of a motor vehicle, and this interruption then leads to a resetting of the control apparatus. Since a reinitializing of the microcomputer system of the control system is required after such a resetting, no controlling of the fuel injection or ignition, for example, can be effected by the control apparatus during this initializing period.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a device for suppressing voltage drops, which avoids the disadvantages of the prior art.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a device for suppressing voltage drops in apparatuses which can be connected with a battery via at least two lines for their voltage supply, wherein in accordance with the present invention a circuit arrangement is provided between the two lines, and a connection to the second line is produced when the voltage drop occurs on the first line.
When the device for suppressing voltage drops is designed in accordance with the present invention, it has the advantage over the prior art that the control apparatus continues to be permanently supplied with voltage when a voltage drop occurs because the voltage is supplied in this case via the second line carrying the connected battery voltage as well as via the circuit arrangement arranged between these two lines.
It is particularly advantageous that the circuit arrangement located between the two lines can conduct high current and causes no considerable voltage drop.
Under normal circumstances, i.e. in the absence of voltage drops, the circuit arrangement arranged between the two lines does not influence the voltage supply. This is an additional advantage of the device according to the invention.
The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with
REFERENCES:
patent: 4305004 (1981-12-01), Tanaka et al.
patent: 4342922 (1982-08-01), DiMassimo et al.
patent: 4698578 (1987-10-01), Mullersman et al.
patent: 5118962 (1992-06-01), Ishii et al.
Bach Jochen
Loistl Hans
Fleming Fritz M.
Pellinen A. D.
Robert & Bosch GmbH
Striker Michael J.
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