Surgery: kinesitherapy – Kinesitherapy – With light – thermal – magnetic – or electrical application
Patent
1994-11-30
1996-04-02
Koczo, Michael
Surgery: kinesitherapy
Kinesitherapy
With light, thermal, magnetic, or electrical application
123198F, 123198D, F02B 3712, F02D 1700, F02D 2302
Patent
active
055029663
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a protection system for a pressure-charged (supercharged) combustion engine.
BACKGROUND INFORMATION
A system of this kind is known from German Unexamined Patent Application No. DE 25 29 186 (corresponding to U.S. Pat. No. 4,044,560). It discloses a boost-pressure control for a pressure-charged internal combustion engine. When a predetermined boost-pressure is exceeded, the entire fuel supply to the internal combustion engine is interrupted until the predetermined boost-pressure is undershot again. The interruption of the fuel supply is accomplished by switching off the fuel pump.
To control the power output of an internal combustion engine, German Patent Application No. DE 29 28 075 A1 has furthermore disclosed switching off individual cylinders in accordance with a predetermined pattern, the switch-off pattern being chosen so as to ensure that it is not always the same cylinders which are switched off.
The underlying object of the invention is to ensure optimum protection for a pressure-charged internal combustion engine.
SUMMARY OF THE INVENTION
The present invention has the advantage of making it possible to optimally protect a pressure-charged internal combustion engine from damage caused by excessive boost-pressure. The gradation of different protective measures in dependence upon the extent of over-boosting has a particularly advantageous effect. This ensures, on the one hand, that the respective protective measure taken is matched to the extent of over-boosting and that an unnecessarily severe torque drop is thus avoided. On the other hand, it is possible, by means of the different protective measures, to achieve particularly reliable protection of the internal combustion engine, which remains effective even when, for example, the final controlling element for controlling and/or regulating the pressure-charging has jammed.
With regard to the pressure-charging of the internal combustion engine, a distinction is drawn between three operating states, namely normal operation, the first stage of over-boosting and the second stage of over-boosting.
Normal operation exists when a variable which characterizes the pressure-charging lies below a first threshold value P1. In normal operation, the pressure charging of the internal combustion engine is controlled and/or regulated to a specifiable desired value of the present invention, P Setpoint, depending on the exemplary embodiment.
The first stage of over-boosting exists when the first threshold value P1 for the pressure-charging has been exceeded for longer than a predeterminable first time period t1Max. In this case, an intervention into the control and/or the regulation of the pressure-charging is performed. For example, the control and/or regulation system is switched off and the final controlling element which influences the pressure-charging is adjusted to a predeterminable position. Waiting for the first time period t1Max offers the advantage that erroneous triggering of the protection system, for example due to an overshoot in the control loop for the pressure-charging or due to an incorrect measured value, can largely be avoided.
The second stage of over-boosting exists when the measure introduced in the first stage of over-boosting to reduce the pressure-charging has not had a sufficient effect, i.e. when a second threshold value P2 for the pressure-charging has been exceeded for longer than a predeterminable second time period t2Max. In the second stage of over-boosting, the fuel metering to individual cylinders is initially interrupted in accordance with a first skip pattern. If this measure does not lead to the second threshold value P2 for the pressure-charging being undershot again within a third time period t3Max, a second skip pattern with a higher skip frequency is activated. Further skip patterns can follow, depending on the exemplary embodiment. Skipping individual cylinders instead of a global cut-off of fuel metering has the advantage that an abrupt torque drop is avoided si
REFERENCES:
patent: 4044560 (1977-08-01), Dorsch et al.
patent: 4470390 (1984-09-01), Omori et al.
patent: 4603552 (1986-08-01), Kido
patent: 4633670 (1987-01-01), Iwasa
patent: 4685435 (1987-08-01), Denz et al.
Patent Abstracts of Japan, vol. 15, No. 182 (M-1111) 10 May 1991 & JPA03 043 644 (Mitsubishi Motors Corp.) 25 Feb. 1991.
Patent Abstracts of Japan, vol. 11, No. 123 (M-581) 17 Apr. 1987 & JPA61 265 331 (Nissan Motor Co. Ltd.) 25 Nov. 1986.
Patent Abstracts of Japan, vol. 7, No. 44 (M-195) 22 Feb. 1983 & JPA57 193 737 (Toyo Kogyo KK) 29 Nov. 1982.
Patent Abstracts of Japan, vol. 9, No. 121 (M-382) 25 May 1985 & JPA60 006 029 (Honda Giken Kogyo KK) 12 Jan. 1985.
Baeuerle Michael
Haeming Werner
Hilbert Wolfgang
Rothhaar Ulrich
Sloboda Robert
Koczo Michael
Robert & Bosch GmbH
LandOfFree
Protection system for a pressure-charged internal combustion eng does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Protection system for a pressure-charged internal combustion eng, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Protection system for a pressure-charged internal combustion eng will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2009501