CN1032709C - Method of operating a marine diesel engine - Google Patents
Method of operating a marine diesel engine Download PDFInfo
- Publication number
- CN1032709C CN1032709C CN93102015A CN93102015A CN1032709C CN 1032709 C CN1032709 C CN 1032709C CN 93102015 A CN93102015 A CN 93102015A CN 93102015 A CN93102015 A CN 93102015A CN 1032709 C CN1032709 C CN 1032709C
- Authority
- CN
- China
- Prior art keywords
- air
- charge air
- air cooler
- charge
- temperature
- 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 - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000013535 sea water Substances 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 18
- 238000001816 cooling Methods 0.000 abstract description 12
- 239000000498 cooling water Substances 0.000 description 2
- 239000000659 freezing mixture Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Supercharger (AREA)
Abstract
A method for operating an internal combustion engine, in particular a marine diesel engine, which is supplied with compressed air from an exhaust-gas turbocharger 1 to the cylinders, the air being cooled before entering the cylinders. But a part of the charge air bypasses the charge air cooler 5. The amount of this charge air is controlled in such a way that it is ensured that the temperature of the entire charge chamber air in the line downstream of the charge air cooler 5 is above the dew point and does not exceed the maximum permissible temperature of the engine. This method enables the intake air pressure to be increased. The bypass line 9 is provided with a control valve. The charge air cooler 5 is water cooled and the bypass line 9 may be provided with a cooling jacket 12.
Description
The present invention relates to a kind of by supply the operation method of the marine diesel engine of pressurized air to each cylinder of motor from an exhaust-gas turbocharger with a charge air cooler of cooled with seawater.
As everyone knows, little by little dirty such as the pressurized air side meeting quilt of the charge air cooler of using in the marine diesel engine, and this will make its flow resistance correspondingly increase.This will cause the suction pressure of internal-combustion engine to reduce again and the corresponding of engine output reduces, and for the reduction of compensation power, needs to increase fuel consumption.Simultaneously, the load on the exhaust-gas turbocharger also will increase.
The known internal-combustion engine with an exhaust-gas turbocharger (DE 3627686A1) has an admission line that a charge air cooler is housed.For quite high intake temperature is provided in whole load and velocity range in the warming-up process of this internal-combustion engine, avoid again simultaneously when internal-combustion engine in the problem that operating temperature following time is caused by too high intake temperature, branch out a bypass tube road and make its bypass cross charge air cooler from air inlet pipeline.Allow whole flows of inlet air flow through this bypass line reaches a regulation in internal-combustion engine temperature earlier.In case internal-combustion engine reaches the operating temperature of regulation, promptly close bypass line with a suitable switch gear, make whole pressurized airs pass through charge air cooler.
In patent DE3929123A1 (patent families GB2223272), disclosed a kind of marine diesel engine operation method, adopted this method can be by the described switch gear that is installed on hygrosensor on suction tude or the outlet pipe zone or similar sensor temperature be located at above-mentioned pattern with control the internal-combustion engine.So just do not need to come installation switching device by a kind of on; On the contrary, it can move to the left and right sides scope in neutral position to be fit to the working condition of ventilating air situation and motor more accurately according to the temperature that detects.
Also disclosed the cooling structure on a kind of internal-combustion engine that is used to have sizable output power in patent DE3617359C1, it is the cooling water pump circulation that adopts turbosupercharger, motor and charge air cooler.In this case, whole pressurized airs are all by carrying out air-cooler.This just causes under the situation of no other control gear, and charge-air temperature will depend on load and regulate voluntarily.
Can recognize a kind of internal-combustion engine of cooled with seawater from the 294-295 page of 49 phases of MTZ engine technology magazine (1,988 7, August publish), the internal-combustion engine important problems of this cooled with seawater is to be cooling, comprise the cooling of pressurized air, maintain on the alap level so that heat radiation reaches the temperature rise of motor locular wall thereupon.For this purpose, charge air cooling system is provided with a cooling jacket.
The object of the present invention is to provide a kind of marine diesel engine operation method, reduce the drag overall that pressurized air must overcome by this method, thereby make the boost pressure raising thus and but the output power of motor is increased, or under the continuous situation about increasing of the resistance of charge air cooler, kept.Simultaneously, the fuel consumption of motor is reduced, and the load on the exhaust-gas turbocharger also reduce.
This purpose realizes with a kind of method of the above-mentioned type that relies on the following practice: charge air cooler is with constant coolant flow speed work; Even in the normal operation process of marine diesel engine, part pressurized air also bypass is crossed charge air cooler, and these are determined by the amount of the pressurized air of bypass, the temperature that can guarantee the whole pressurized airs in the pipeline of charge air cooler downstream is on dew point, and be no more than the maximum allowable temperature of marine diesel engine, and the pressurized air that makes bypass cross charge air cooler is cooled off by water jacket.When the whole available cooling capacity of charge air cooler for example makes the temperature of pressurized air be reduced to once too low level owing to cooling water temperature is low---a part of pressurized air does not pass through charge air cooler.Amount to this part pressurized air is controlled in such a way, and the temperature of making as a whole pressurized air that obtains after promptly guaranteeing to mix is no more than the temperature levels of the permission in charge air cooler downstream.Bypass is crossed resistance that the amount of charge air of charge air cooler need overcome should be lower than resistance by the pressurized air of charge air cooler substantially.This will make the charge-air pressure in charge air cooler downstream close needs ground to increase, the output power that this also can reduce the load on the exhaust-gas turbocharger and increase motor, or at the resistance of charge air cooler for example owing under the situation of dirty and continuous increase, output power is remained unchanged.
Yet charge-air temperature can be regulated by the amount of charge air of charge air cooler individually by measuring to shift.
Though the efficient of cooling jacket is lower, it can further desirably reduce charge-air temperature under the situation of the flow resistance that does not increase that part of pressurized air that shifts by bypass line.
Method of the present invention is the most effective when the temperature that makes inlet air remains on level run between 40～45 ℃.
Come below with reference to motor schematic view illustrating method of the present invention with according to a kind of internal combustion engine configurations of the present invention.
Accompanying drawing 1 has been represented the exhaust-gas turbocharger 1 of a conventional design, and it is by the exhaust gas drive of the internal-combustion engine that is not shown specifically.These exhausts are to be transported to exhaust-gas turbocharger 1 by a gas exhaust piping.
Exhaust-gas turbocharger 1 sucks ozone and inhaled air is sent in first section 4 an of air inlet pipeline along the direction of arrow 3, and it leads to the charge air cooler 5 of a cooled with seawater.The air inlet that is cooled is left charge air cooler 5 along the direction of arrow 6, and second section 7 by air inlet pipeline enters a mixing chamber 8.System also is equipped with a bypass tube road 9, and its bypass is crossed charge air cooler 5 and is connected in first section 4 of inlet air pipeline, and also leads to mixing chamber 8.Bypass line 9 is provided with a control valve 10.
Mixing chamber 8 is connected to each cylinder (not shown) of internal-combustion engine by each connecting pipeline 11.
Charge air cooler 5 is furnished with a tie point 12, is used for entering and flow out as the seawater of freezing mixture.
When the whole pressurized airs that extrude by exhaust-gas turbocharger 1 by air inlet pipeline 4,7, flow through charge air cooler 5 again, and this cooler 5 is when turning round under maximum coolant flow, the temperature of pressurized air generally is lowered to a low-down degree.In order to prevent this situation, motor need turn round under a coolant flow that reduces.The method according to this invention, a part of pressurized air be by by bypass line 9 and control valve 10 shuntings, is admitted to mixing chamber 8 subsequently and without cooling.So two bursts of charge air flow are mixed in mixing chamber 8, wherein one is through charge air cooler 5 and be cooled, and another strand flows to mixing chamber 8 by bypass line 9.Control by control valve 10 by that a part of pressurized air that bypass line 9 flows through, do not exceed the Maximum allwable temperature of air-intake of combustion engine with the temperature that guarantees the whole pressurized airs in the mixing chamber 8.For this reason, inlet air is maintained at needs in 40 ℃ to 45 ℃ the temperature range.This measure can make the increased pressure of the inlet air in the mixing chamber 8, because carry that part of charge-air pressure of the coming pressure height than that part of pressurized air by charge air cooler 5 by bypass line 9, this is because the flow resistance of charge air cooler 5 is more much higher than the resistance of bypass line 9 certainly.The increase of the inlet air pressure in the mixing chamber 8 will make the output power of internal-combustion engine increase, and perhaps makes to obtain identical output power under a lower turbosupercharger 1 load.Make each cylinder of internal-combustion engine can both obtain more effective scavenging and air inlet.
By the aperture of control bypass line 9 can the balance pressurized air pressure drop, it may be owing to, the air side of charge air cooler 5 dirty and producing for example.Like this, according to the temperature of the seawater that is used as freezing mixture, method of the present invention can make pressurized air be cooled to minimum permissible temperature in charge air cooler 5.Subsequently by not making this increase in temperature in the allowable temperature scope of internal-combustion engine by charge air cooler 5 thereby with that part of pressurized air that the state that is not cooled enters mixing chamber 8.
Bypass line 9 can be provided with a cooling jacket 12, and seawater is also from wherein passing through.This cooling jacket 12a can not increase the flow resistance of bypass line 9, but can produce slight cooling action to that part of pressurized air that passes through from bypass line 9.So, the pressurized air of a major part is flow through by bypass line 9, can keep the temperature in the mixing chamber 8 simultaneously again, consequently, suction pressure can further improve, and the load on the exhaust-gas turbocharger 1 can further reduce.
Claims (2)
1. be used to move a kind of method of marine diesel engine, its inlet air is each cylinder that supplies to marine diesel engine from an exhaust-gas turbocharger, described inlet air is the charge air cooler through a cooled with seawater, it is characterized in that: described charge air cooler is with a constant coolant flow job, even in the normal course of operation of marine diesel engine, a part of bypass of pressurized air is crossed charge air cooler, the air quantity of this part bypass is controlled in such a way, the temperature that promptly will guarantee the whole pressurized airs in the downstream pipeline of charge air cooler and is no more than the maximum allowable temperature of marine diesel engine on dew point; And that part of pressurized air that bypass is crossed charge air cooler is cooled off by water jacket.
2. the method for claim 1 is characterized in that: intake air temperature is maintained in 40 ℃ to 45 ℃ the scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93102015A CN1032709C (en) | 1993-02-23 | 1993-02-23 | Method of operating a marine diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93102015A CN1032709C (en) | 1993-02-23 | 1993-02-23 | Method of operating a marine diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1091495A CN1091495A (en) | 1994-08-31 |
| CN1032709C true CN1032709C (en) | 1996-09-04 |
Family
ID=4983906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93102015A Expired - Fee Related CN1032709C (en) | 1993-02-23 | 1993-02-23 | Method of operating a marine diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1032709C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6976479B1 (en) * | 2004-08-10 | 2005-12-20 | Electro-Motive Diesel, Inc. | Engine with optimized engine charge air-cooling system |
| JP4629782B2 (en) * | 2006-02-23 | 2011-02-09 | マック トラックス インコーポレイテッド | Supply air cooler apparatus and method with cooler bypass |
| DE102006061374B4 (en) * | 2006-12-22 | 2016-12-08 | Siemens Aktiengesellschaft | System for utilizing excess energy in the exhaust gases of a two-stroke large diesel engine |
| CN100451309C (en) * | 2007-03-15 | 2009-01-14 | 武汉第二船舶设计研究所 | Turbocharging engine booster air intercooler |
| CN108266261B (en) * | 2018-02-07 | 2022-02-11 | 广西玉柴机器股份有限公司 | Marine diesel engine intercooling system using waste gas energy |
-
1993
- 1993-02-23 CN CN93102015A patent/CN1032709C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1091495A (en) | 1994-08-31 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |