DE2036045A1 - Multi-cylinder injection internal combustion engine - Google Patents

Description

203604S

Daimler-Benz Aktiengesellschaft Daini 8622 / * !:

Stuttgart - Untertürkheim 20 * July 1970

EPT Krt / pfa.

"Multi-cylinder internal combustion engine"

The invention relates to a four-cylinder internal combustion engine, in which the idle air the cylinders bypassing both the air volume in the intake manifold adjusting Throttle valve as well as the individual intake pipes leading to a cylinder and fed by the manifold intake pipe.

The object on which the invention is based essentially consists in the case of the German Offenlegungsschrift 1,526,647 known multi-cylinder injection combustion machine this type of ventilation of the crankcase with recirculation of the ventilation gases via the intake system into the combustion chambers of the To create cylinder in which the risk of contamination of the intake lines is largely avoided. This pollution hazard occurs in the case of US Pat. No. 3,241,535 known carburetor internal combustion engine, in which the vent particles upstream or downstream depending on the load condition of the machine the throttle valve into the intake manifold.

The object is achieved according to the invention in that with the use of a known in carburetor combustion engines and downstream of the throttle valve for the amount of air in the intake line opening bypass line for venting the crankcase, the bypass line in or upstream of the branch point of the idle air inlet to the idle air system connected*

The most essential advantage achieved in addition to the intended purpose

209811/0775

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The invention is to be seen in the fact that in the case of strongly fissured intake systems, e.g. with a V-arrangement of the cylinders, sections of the intake manifold can also be lower - e.g. in the V-space - than the cylinder connections or the manifold connections of the individual intake manifolds, without each other In this lower-lying section, liquid components of the vent gases can be separated and collected. Another advantage of the invention is that the vent gases are distributed very evenly to all cylinders.

In the known injection engine from which the invention proceeds, the distribution of the enriched: "-" St art mixture to the individual cylinders takes place via a special in the Idle air system switched on distributor element «Advantageously is the bypass line for the venting gases to the Distributor connected.

Details of the invention are given below with reference to one in The embodiment of the internal combustion engine according to the invention shown in the drawing is described in more detail Drawing mean - _

1 shows a schematic cross section through an internal combustion engine with a V arrangement of the rows of cylinders and

Figure 2 is a schematic of the idle air system of the machine in Fig. 1.

The two V-shaped cylinder rows are with 10 and 11 and the one inlaid through them. V «Rauw ist.nit 12

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20360Λ5

- 3 - Daira 8622/4

designated. To achieve a flat design of the machine, the intake air collection pipe 13 is arranged deep in the V-Raura 12, so that the intake air filter 'Ik connected upstream of the collection pipe 13. protrudes only a little beyond the rows of cylinders 10 and 11. The individual intake pipes 17 and l8 leading to the individual cylinder heads 15 and 16 of the cylinder rows are designed as oscillating pipes and open into the intake air manifold 13 controlling throttle valve 20 is mounted.

To the control housing serving to support the control shaft 21.. the cylinder bank 10 is connected to a bypass line 22 which leads to the venting particles from the crankcase, which is connected to the stouer housing 21 and which opens into a distributor element 23 of the idle air system 2k of the machine.

The idle air system 2 & is basically constructed as follows1. An idle air duct 26 is connected to the mixing chamber 25 of the distributor element 23 and is branched off from the clean air chamber 27 of the filter * Ik. The injection nozzle 28 of a starting valve 29 for fuel for generating an enriched starting mixture protrudes into the mixing chamber 25. Furthermore, the mixing chamber 25 is provided with a connection 30 for warm-up air. The mixing chamber 25 is connected via an intermediate line 31 to two individual idle air lines 32 and 33, each of which is connected at 3 ^ and 35 to the individual suction pipes 17 and 10 in the immediate vicinity of the cylinder suction pipes. In this way, the venting parts are bypassed the intake manifolds % j and the individual intake pipes I? uad l8 are fed equally distributed to the combustion chambers of the heads 15 and 1: 6. Above all, this arrangement prevents the low-lying intake air manifold 13 from building up. the sump can settle from the ventilation particles »

209811 / (1175. ■ ■

BATH

Claims (2)

2C. July 1970 claims; 1. / Mehrsylindrigo Einspritsbt-Giinkra.i'tnia.sehiiic ·, in which the idling air from the cylinders, bypassing both the P-rosr.r-XJilnppe, which adjusts the air tightness in the intake aramolroKr, as well as the one that leads to a cylinder and is fed by the Samino intake manifold. Individual exhaust pipes are supplied, characterized in that with the use of a bypass pipe for venting the crankcase which is known from Ver ^ aserbrenn & rafttnaschineii and which opens downstream to the throttle valve for the amount of air for the ventilation of the crankcase, the Uragehtmssleitun £ (22) in or upstream to the branch the idle air single pipes (32 and 33) ^ n the idle air system {2k \ connected 2. Internal combustion engine according to claim 1, with one in the idle air system switched on distributor for the distribution of the enriched starting mixture to the single cylinder, characterized in that the bypass line (22) is connected to the distributor member (23). . 20 98 1 T / 0 77 5