CN102454467A

CN102454467A - Oil supply control for internal combustion engine pistons

Info

Publication number: CN102454467A
Application number: CN2011103165093A
Authority: CN
Inventors: W.克雷布斯; T.洛纳特; H.汉斯
Original assignee: GM Global Technology Operations LLC
Current assignee: GM Global Technology Operations LLC
Priority date: 2010-10-18
Filing date: 2011-10-18
Publication date: 2012-05-16
Also published as: GB2484748A; GB201017954D0

Abstract

A internal combustion engine with pistons has a first oil gallery (44) for selectively supplying oil to the pistons under the control of a valve (50). The engine can include a further oil gallery (34) for bearing lubrication, and the valve is controlled by a control device (54) providing control signals such that the valve can provide oil for piston cooling. The valve can be controlled in dependence on one or more operating parameters, e.g. oil temperature or pressure, coolant temperature, engine speed and engine load, and may be a solenoid valve.

Description

The oil supplying device that is used for piston

Technical field

The present invention relates to be used to the system of internal combustion engine fuel feeding, more particularly relate to for the purpose of cooling piston and give piston squirter oil duct fuel feeding.

Background technique

Existing be in the system of internal-combustion engine fuel feeding, the supply line network is used to be included as lubricated purpose for different engine packs from common source and gives main bearing and give piston (for the cooling purpose) fuel feeding.In order to keep the proper lubrication of main bearing, it requires always lubricated.Yet piston cooling nozzle is only required at special time oil is sprayed onto on the piston.Therefore, in known system, giving piston squirter oil duct fuel feeding is under the control of spring actuated valve.The spherical component of valve is exposed to the oil pressure in the system.When reaching specified pressure, it forces the strength of spherical component antagonistic spring that valve is opened, and flows out through the piston squirter oil duct and from cooling jet to allow oil.

The shortcoming of said system is that the best number of times for the nozzle cooling piston is actually by the factor except that pressure and confirms.This causes being lower than the optimum efficiency of operation motor, and it causes increasing fuel consumption and CO2 emission.

Summary of the invention

Aspect of the present invention is to seek to overcome or reduce above-mentioned shortcoming at least.

According to a first aspect of the invention; A kind of internal-combustion engine is provided; It comprises bearing and a plurality of piston, oily supply source and is used for from the tube equipment of this oil supply source to bearing and piston fuel feeding that wherein tube equipment comprises first pipe element and second pipe element of arranging to the piston fuel feeding of arranging to give the bearing fuel feeding, and second pipe element comprises that valve is used to control the fuel feeding to piston; Wherein control gear is provided for valve, and it provides signal with control valve.

The advantage of above-mentioned motor is that the fuel feeding that is used for cooling piston can be independent of the fuel feeding that is used for lubricating bearings and controlled.This causes the motor more efficient operation, and therefore is enough to reduce fuel consumption and CO2 emission.

In more excellent motor, control gear depends on one or more operating parameters and comes control valve.This makes and is independent of the pressure in the bearing lubrication loop by motor, and/or considers to influence at the cooling piston place factor widely of best number of times, and is controlled.

Therefore the opening and closing of the valve factor that can depend on below one or more is controlled:

The temperature of-oil;

-in cooling circuit, be used for the temperature of the freezing mixture of motor;

The temperature of the cylinder block of-motor;

The temperature of the cylinder head of-motor;

-engine speed; And/or

-engine load.

In addition, what perhaps replace is that valve can be controlled by the switching element of user's operation.The chance that this surmounts control gear for the user is if specified conditions are dominant.

Alternative is that perhaps in addition, valve can be controlled according to preset program.This makes control gear surmounted at special time once more.

According to a second aspect of the invention; Provide the oil supply system of the internal-combustion engine that is used to comprise a plurality of pistons; Wherein oil is supplied to tube equipment to provide oil to be used for cooling piston to outlet, and tube equipment comprises valve, and wherein valve is controlled by the variable that is different from oil pressure at least.

Description of drawings

More excellent embodiment of the present invention will only describe by means of the example reference accompanying drawing now, wherein:

Fig. 1 is the schematic representation of the lubrication system (oil system) of prior art;

Fig. 2 shows according to oil supply system of the present invention (oil supply system);

The control circuit of the oil supply system of Fig. 3 displayed map 2.

Reference number

Oil supply system 10

Oil tank 12

Pipeline 14

Oil duct 16

Motor 20

Nozzle 22

Pipeline 24

Valve 26

Oil supply system 30

Get into pipe 32

Main oil gallery 34

Pipeline 36

Fuel feeding

38,40

Pipeline 42

Piston squirter oil duct 44

Nozzle 46

Valve 50

Line 52

Control unit 54

Sensor 60

Cylinder block 62

Line 64

Duct thermostat 70

Water pump 72

Line 74

Sensor 80

Line 84

Tachometer 90

Line 94

Sensor 100

Line 104

Control unit 110

Embodiment

With reference to accompanying drawing, Fig. 1 shows the system 10 of prior art, and it is used for the assembly fuel feeding to car combustion engine 20, representes the direction of oil flow with arrow.Oil is supplied to oil duct (oil gallery) 16 with lubricated main bearing and cooling piston nozzle from oil tank 12 through piping 14.Oil is through filter recirculation oil return jar 12.

The oil that is used for lubricated main bearing is through a plurality of pipelines 24.The oil that is used for the cooling piston sparger passes through nozzle 22 separately.Each nozzle and integrated pressure responsive valves 26 merge, and this valve comprises along the ball of valve closing direction by the helical spring bias voltage.When the pressure in oil supply system surpassed predetermined threshold, it promoted ball away from its position, and spring is compressed, to allow valve to open and piston is cooled.

Oil duct 16 is also supplied further engine pack, as is used for the first top oil supplying device 38 of valve mechanism (valve train) and is used for the second top oil supplying device 40 of variable cam phaser through piping 42.

With average ambient temperature, after engine engagement was perhaps tight before, valve 26 was in closed condition.When rotating speed increased, the pressure of oil increased.When reaching predetermined threshold value, the pressure of oil is opened valve 26, and oil flows out from oil nozzle with the cooling respective pistons.

Under cold condition, as in winter, valve 26 is in closed condition once more before engine engagement.Yet when engine engagement, oil pressure rises immediately, because oil is high viscosity when low temperature.Therefore, valve 26 is opened immediately.In engine operation process subsequently when oil temperature rises, so its viscosity and pressure decline.Therefore owing to influence engine operation parameters (like engine speed and the load) variation of oil pressure, valve 26 can cut out and open repeatedly.

With reference to figure 2, show according to the system 30 that is used for to the assembly fuel feeding of internal-combustion engine of the present invention.The oil of cleaning is through getting into the main oil gallery 34 that pipe 32 gets into piping network, and the flow direction of oil is by shown in the arrow.The main bearing of motor is lubricated by the oil through pipeline 36.

Oil duct 34 is also connected to pipeline 42.Pipeline 42 is given independent piston squirter oil duct 44 fuel feeding that are connected to piston cooling nozzle 46, and each nozzle 46 is aimed at its hottest part oil spouts of piston separately, is at exhaust side as the one of which.Oily recirculation from the piston squirter oil duct turns back to oil tank 12.

Mobile connection between pipeline 42 and oil duct 44 is opened and is sealed through solenoid valve 50 being selected property.The opening and closing of valve 50 are under the control of the signal that offers valve through one or more lines 52 from control unit 54.

Motor and sensor separately merge, and are used to detect the temperature and pressure of oil in system 30.According to the content of corresponding look-up table, valve 50 opens or closes, to such an extent as to piston is cooled when correlated condition is dominant.

Above the advantage of described layout be that oil can offer piston by fine-tuning mode rather than coarse adjustment mode when only confirming in the oil pressure ratio and spray.It is more perfect, because it can consider all operations condition.This allows the motor more efficient operation, and it causes reducing fuel consume and CO2 emission.

Except or replace one or two of above-mentioned variable, temperature, engine speed and the engine load of the temperature of water or other freezing mixture of valve 50 in can the responding engine cooling circuit, the temperature of cylinder block, cylinder head and being controlled.

Fig. 3 is the chart that shows various sensors, and the signal that comes from wherein can be used for control unit 54.The metallic material that sensor 60 is attached to cylinder body 62 wherein provides on the temperature and online 64 signal relevant with temperature to control unit 54 with sensing.

Water pump 72 (it is used for through the pipeline recirculated cooling water in motor 20) has (map-controlled) duct thermostat 70 of mapping control.The signal that in cooling system, depends on water temperature is provided for control unit 54 through line 74.

Oil tank or fuel tank 12 have sensor 80, and being used to detect on oil temperature and online 84 provides corresponding signal to control unit 54.

Tachometer 90 is provided on online 94 provides and the proportional signal of engine speed for control unit 54.Further sensor 100 is associated with the accelerator pedal of vehicle, on online 104, the signal that depends on engine load is provided.

One or more can the omission on demand in the

sensor

60,70,80,90 and/or 100.For example, can have only a

temperature transducer

60,70 or 80.

Control unit 54 comprises microcomputer, and its application-dependent determines when that in the algorithm of above-mentioned variable the electromagnetic coil of valve 50 is actuated to open valve.

For dissimilar motors, the algorithm in control unit 54 is set up difference.For example for turbosupercharged engine, have high load as the one of which and operate, middle pressure is positioned at the 15-20bar scope.Naturally aspirated engine is operated with different average conditions with direct injection ic engine, and for example naturally aspirated engine has the middle pressure that approaches 12bar.

Represent the signal of measurand can come from any detection position easily in the motor.

The electromagnetic coil of valve 50 can be actuated replacement discontinuously and actuated continuously basically.Independent control unit 110 can be provided to control this factor.Alternative is that control unit 110 can be incorporated control unit 54 into.

Control unit 54 can be with in valve 50 be contained in identical housing.

In another was revised, valve came independent control by the unit that is independent of the operational condition that is dominant, as by the switch of user's operation or according to preset program.

Claims

1. an internal-combustion engine (20); It comprises bearing and a plurality of piston, oily supply source (12) and is used for giving from said oily supply source the tube equipment (32,34,42,44) of said bearing and said piston fuel feeding; Wherein said tube equipment comprises and is set to first pipe element (34) of said bearing fuel feeding and is set to second pipe element (44) to said piston fuel feeding; Said second pipe element comprises that valve (50) is with the fuel feeding of control to said piston; Wherein control gear (54) is set for said valve, and this control gear provides signal controlling said valve, and wherein said valve (50) is controlled by the switching element of user's operation.

2. motor as claimed in claim 1, wherein said control gear (54) relies on one or more operating parameter and controls said valve (50).

3. motor as claimed in claim 2, wherein said valve (50) depend on the oil temperature and are controlled.

4. like claim 2 or 3 described motors, wherein said valve (50) depends in the temperature of the freezing mixture of the cooling circuit that is used for said motor and is controlled.

5. like each described motor in the claim 2 to 4, wherein said valve (50) depend on said motor cylinder block temperature and controlled.

6. like each described motor in the claim 2 to 5, wherein said valve (50) depend on said motor cylinder head temperature and controlled.

7. like each described motor in the claim 2 to 6, wherein said valve (50) depends on engine speed and is controlled.

8. like each described motor in the claim 2 to 7, wherein said valve (50) depends on engine load and is controlled.

9. like the described motor of claim of arbitrary front, wherein said valve (50) is controlled according to preset program.