Internal-combustion engines – Starting device – Condition responsive control of starting device
Reexamination Certificate
1999-11-04
2001-06-05
Dolinar, Andrew M. (Department: 3747)
Internal-combustion engines
Starting device
Condition responsive control of starting device
C290S03800C
Reexamination Certificate
active
06240890
ABSTRACT:
PRIOR ART
The invention relates to a starting device for an internal combustion engine and a method for starting the internal combustion engine.
The generic-type-forming JP 59-82575 A discloses that two starters are provided to start an internal combustion engine. The starters are activated here as a function of the operating temperature of the internal combustion engine, specifically in such a way that when the internal combustion engine is cold two starters carry out the starting of the internal combustion engine. When the internal combustion engine is warm, this is to be performed with just a single starter.
DE 89 14 904 U1 discloses a starter motor which serves as a generator while the internal combustion engine is operating. For this purpose, the starter motor has a two-stage planetary gear mechanism, which makes available a high torque in the first phase of the starting process and a lower torque, with a higher rotational speed, in the following starting phase.
In addition, a starting device which has a starter is known from Bosch Kraftfahrtechnisches Handbuch [Bosch Automotive Manual], 22nd Edition, 1995, VDI-Verlag [publishing house], pages 541 to 544.
The starter here is designed in such a way that a reliable cold start can be carried out even at low external temperatures (down to approximately −40° C.) For this purpose, a starter speed of at least 120 revolutions/min is usually provided for the starter. In order to be able to bring the internal combustion engine from the starter speed to the cold idling speed during the starting process, it is necessary to inject and combust a relatively rich fuel/air mixture after the starter speed has been reached. The result of this is that during this phase relatively high exhaust gas emissions, in particular of hydrocarbons, are produced, which, however, cannot be controlled by a catalytic converter which is not yet at its operating temperature. The requirements of low emission schemes, such as are prescribed in California for example, cannot therefore be fulfilled with such starters.
More recent developments, for example ISAD (Integrated Starter Alternator Damper), are characterized by particularly high-performance starter generators in which the intention is to improve the emission values by means of a raised starter speed. However, it is disadvantageous that during a cold start of the internal combustion engine, such starter generators require high voltages of, for example, 36 or 42 volts from the vehicle's electrical system.
SUMMARY OF THE INVENTION
The starting device according to the invention for an internal combustion engine has, in contrast to the above, the advantage that during a cold start of the internal combustion engine there is a significant decrease in the harmful components in the exhaust gas, in particular of hydrocarbons. This is advantageously possible without changing the conventional 12 volt electrical system of a vehicle.
REFERENCES:
patent: 4662233 (1987-05-01), Mazzorana
patent: 4684816 (1987-08-01), Mazzorana
patent: 5095864 (1992-03-01), Bolenz et al.
patent: 89 14 904 U (1989-12-01), None
patent: PCT WO 88/06238 (1988-08-01), None
patent: 1199145 (1967-08-01), None
European Search Report No. 99120729.1-1231, Feb. 17, 2000.
Patents Abstracts Of Japan, “Engine Starting Device”, Appl. No. 57-193794, M-322 Sep. 4, 1984, vol. 8/No. 191.
Abthoff Jorg
Kemmler Roland
Magg Klaus
Matt Martin
Wieland Dittmar
Daimler-Chrysler AG
Dolinar Andrew M.
Shurupoff Lawrence J.
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