DE102016222254A1 - Internal combustion engine - Google Patents

Abstract

Internal combustion engine with a lubricant supply for at least one lubricant consumer, wherein lubricant from a lubricant reservoir from a lubricant reservoir through a main lubricant channel and further by at least one lubricant side channel to the at least one lubricant consumer is conveyed, the main lubricant channel is insulated with a thermal insulation means to an environment.Durch Embodiment of the internal combustion engine is reduced by a simple, robust and cost-effective measure of the fuel consumption of the internal combustion engine.

Description

The invention relates to an internal combustion engine with a lubricant supply for at least one lubricant consumer with the features of the preamble of patent claim 1.

For technical environment is for example on the German disclosure DE 10 2012 004 003 A1 pointed. From this publication, an internal combustion engine with a lubricant supply device for supplying at least one bearing point of a consumer and / or the like is known. The lubricant supply device has at least one lubricant channel, with which the lubricant from a supply direction to the bearing point or the consumer is feasible, and with at least one between at least one lubrication channel at least partially releasing release position and the lubricant channel fluidly obstructing closed position adjustable locking element, wherein a closure position of the blocking element is at least partially prevented from flowing out of the lubricant channel in the lubricant channel from the lubricant channel into the supply device.

Next is from the German patent application DE 10 2009 052 376 A1 a lubricant supply device for a motor vehicle. With the lubricant supply device, at least one unit to be lubricated and / or a component to be lubricated and / or a bearing of the motor vehicle can be supplied with lubricant and with at least one heating element, by means of which the lubricant can be heated, the heating element being an electric heating element with positive temperature coefficients (PTC ) is trained.

Next are from the German disclosure DE 10 2008 021 255 A1 a lubricant storage tank and a lubricant circuit known. In order to achieve not only during the engine warm-up but also in the warm operating condition, a reduction of the friction power and thus a reduction of the fuel consumption of an internal combustion engine, a second storage volume is provided.

The internal combustion engine, in which the lubricating oil-carrying channels usually run, consists of a material with very high thermal conductivity (gray cast iron, aluminum). So far, the lubricant is mainly heated by the use of heat generated from the coolant. Due to the high thermal conductivity is on the way to a point to be lubricated disadvantageously a large part of the heat lost through diffusion again.

Due to the heat diffusion, the lubricant is too cold at relevant lubrication points. By supplying the friction points with lubricants that are not ideally tempered, fuel consumption, which does not correspond to the optimum, occurs, especially during warm-up of the internal combustion engine. Also, the potential of additional measures, such as heat storage, can not or only slightly be used. Active heating of the lubricant, as known from the prior art, is complicated and cost-intensive.

Object of the present invention is to avoid the above-mentioned disadvantages.

This object is achieved by the feature in the characterizing part of patent claim 1.

Advantageous developments of the invention are described in the subclaims.

To eliminate the disadvantages described, the invention provides to isolate the heat conduction of at least the main lubricant channel relative to its environment. In a further development, the at least one lubricant secondary channel can also be insulated from its surroundings.

In a preferred embodiment, the main lubricant channel can run in a crankcase of the internal combustion engine, which is then isolated from the crankcase.

Moreover, the at least one secondary lubricant channel can likewise run in the crankcase and / or a cylinder head of the internal combustion engine and then be insulated from these components, as a result of which heat diffusion is significantly reduced.

In order to achieve a reduction of the cooling of the lubricant on the way to the lubricant consumers, such as friction points, the lubricant-carrying channels (main lubricant channel, lubricant secondary channel, such as puncture channels, etc.) are thus to be surrounded by surrounding structures, maximum diameter drilled or poured. This space should be filled by a material which is temperature resistant, non-removable and as light as possible and further has a coefficient of thermal expansion which is as similar as possible to the surrounding material to avoid as possible during heating and cooling a "working against each other" of the two materials.

Such an insulating means preferably has a wall thickness between 0.1 and 10 mm.

Further, the insulating agent is preferably a plastic, more preferably polytetrafluoroethylene (PTFE), with the trade name Teflon®. However, any other suitable insulating such. As rubber or foams are used.

The insulation according to the invention optimizes the distribution of the energy available during warm-up. In addition, further measures for targeted (local) supply of friction with warm lubricant can be used. Here, above all, the use of heat accumulators, for short-term heating of the lubricant during warm-up, to think. The inventively proposed cheap, less expensive solution significant Kohnsoff consumption reductions can be achieved.

• - Günstige, robuste und wenig aufwendige Maßnahme,
• - Ungünstige Wärmediffusion ist unterbunden,
• - Die Kombination mit weiteren Maßnahmen ist möglich,
• - Kraftstoffverbrauchsreduzierung, insbesondere im Warmlauf der Brennkraftmaschine,
• - Passives Element ohne Regelung oder Stromversorgung,
• - Thermische Vorteile sowohl im Warmlauf der Brennkraftmaschine, als auch bei Volllast, da in diesem Fall weniger thermische Energie von der Brennkraftmaschine in das Schmiermittel eingebracht wird.

Due to the inventive design of the internal combustion engine, the following advantages result:

• - Cheap, robust and less expensive measure,
• - Unfavorable heat diffusion is prevented,
• - Combination with further measures is possible
• Fuel economy reduction, especially during warm-up of the internal combustion engine,
• - passive element without regulation or power supply,
• - Thermal advantages both during warm-up of the engine, as well as at full load, since less thermal energy is introduced from the engine into the lubricant in this case.

• 1 zeigt schematisch ein Kurbelgehäuse einer Brennkraftmaschine mit der erfindungsgemäßen Ausgestaltung.
• 2 zeigt eine Aufsicht auf einen erfindungsgemäßen Schmiermittelbaum.

In the following the invention is explained in more detail with reference to two figures.

• 1 schematically shows a crankcase of an internal combustion engine having the inventive design.
• 2 shows a plan view of a lubricant tree according to the invention.

1 schematically shows a crankcase 3 an inventive, not shown overall engine. The internal combustion engine has a lubricant supply for at least one lubricant consumer, such as a bearing or a in 2 illustrated camshaft adjustment 9 , on, being lubricant from a lubricant pump 2 from a lubricant reservoir, not shown promotes in a not separately quantified lubricant circuit.

The lubricant circuit consists essentially of a lubricant main channel 4 and one or more secondary lubricant channels 5 for supplying lubricant consumers with lubricant and in 2 shown lubricant returns 7 ,

In the present embodiment, the main lubricant channel 4 and the lubricant side channels in the crankcase 3 However, arranged in other embodiments, but also outside the crankcase 3 be arranged.

In the present embodiment is still a Energieeinkoppelung 8th between the lubricant pump 2 and the crankcase 3 intended. The energy input 8th can be represented for example by warm coolant. A conveying direction of the lubricant is schematically represented by two arrows.

Thus, the lubricant pump promotes 2 the lubricant first by the energy input 8th further into the main lubricant channel 4 and further into the lubricant side channels 5 ,

According to the invention, the main lubricant channel 4 opposite the crankcase 3 with a thermal insulation agent 6 isolated. In the present embodiment, moreover, the four lubricant side channels 5 also with a thermal insulation 6 isolated. In addition, the lubricant side channels 5 also in a cylinder head, not shown, of the internal combustion engine with the thermal insulation 6 be isolated.

Preferably, the insulating means 6 a wall thickness between 0.1 mm and 10 mm. For this example, the main lubricant channel 4 drilled or cast with a larger diameter and then with the thermal insulation 6 be coated. Also a plug-in solution (insulating medium pipe in the lubricant channel 4 . 5 introduced) is possible.

It is preferable that the thermal insulating agent 6 an abrasion-resistant, temperature-resistant, non-detachable and as light as possible material such as plastic. Particularly preferably, the plastic polytetrafluoroethylene (PTFE) is used. But other thermal insulation such. As rubber or plastic foams can be used.

2 shows a plan view of a lubricant tree according to the invention for an internal combustion engine. Shown again is the lubricant pump 2 that does not make the lubricant out of one shown lubricant trough first by the energy input 8th promotes and then into the main lubricant channel 4 and from there on into lubricant side channels 5 , A lubricant return is numbered 7. As a lubricant consumer four numbered with 1 bearing points for a camshaft are shown in the present embodiment, as a camshaft adjuster 9 , In the present embodiment, only the lubricant consumers 1 and 9 numbered for a camshaft.

• - Es handelt sich um eine günstige, robust und wenig aufwendige Maßnahme,
• - Die nachteilige Wärmediffusion vom Schmiermittel in das Kurbelgehäuse 3 ist unterbunden,
• - Die Kombination mit weiteren Maßnahmen ist ermöglicht,
• - Die Erfindung führt in vorteilhafter Weise zu einer Kraftstoffverbrauchsreduzierung, insbesondere im Warmlauf der Brennkraftmaschine,
• - Es handelt sich in vorteilhafter Weise um ein passives Element ohne eine Regelung oder eine Stromversorgung.
• - Thermische Vorteile sowohl im Warmlauf der Brennkraftmaschine, als auch bei Volllast, da in diesem Fall weniger thermische Energie von der Brennkraftmaschine in das Schmiermittel eingebracht wird.

The inventive design of the internal combustion engine thus offers the following advantages:

• - It is a cheap, robust and inexpensive,
• - The adverse heat diffusion from the lubricant into the crankcase 3 is prevented,
• - The combination with further measures is possible,
• The invention advantageously leads to a reduction in fuel consumption, in particular during warm-up of the internal combustion engine,
• - It is advantageously a passive element without a scheme or a power supply.
• - Thermal advantages both during warm-up of the engine, as well as at full load, since less thermal energy is introduced from the engine into the lubricant in this case.

LIST OF REFERENCE NUMBERS

1.

lubricant consumer

Second

lubricant pump

Third

crankcase

4th

Lubricant main channel

5th

Lubricant secondary channel

6th

insulation

7th

Lubricant return

8th.

energy coupling

9th

Phaser

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102012004003 A1 [0002]
• DE 102009052376 A1 [0003]
• DE 102008021255 A1 [0004]

Claims (6)

Internal combustion engine with a lubricant supply for at least one lubricant consumer (1), wherein lubricant from a lubricant pump (2) from a lubricant reservoir through a main lubricant channel (4) and further by at least one lubricant secondary channel (5) to the at least one lubricant consumer (1) can be conveyed by in that the main lubricant channel (4) is insulated from an environment by a thermal insulation means (6). Internal combustion engine after Claim 1 , characterized in that the main lubricant channel (4) and the at least one lubricant secondary channel (5) in a crankcase (3) of the internal combustion engine is arranged. Internal combustion engine after Claim 1 or 2 , characterized in that the lubricant side channel (5) relative to the crankcase (3) and / or a cylinder head of the internal combustion engine with a thermal insulation means (6) is isolated. Internal combustion engine according to one of Claims 1 to 3 , characterized in that the insulating means (6) has a wall thickness between 0.1 mm and 10 mm. Internal combustion engine according to one of Claims 1 to 4 , characterized in that the insulating means (6) is a plastic. Internal combustion engine after Claim 5 , characterized in that the plastic is polytetrafluoroethylene (PTFE).

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