2.1.9. Carburetor engines


Fuel pump

The mechanical fuel pump is put in action by the clown of an intermediate shaft.

Characteristic

Value

Depression pressure at inclusion of a starter, kg/cm 2

0,332 — 0,465

  • the maximum pressure drop within 1 minute of operation of the engine, kg/cm 2

0,095

Forcing pressure at inclusion of a starter, kg/cm 2

0,25 — 0,38

  • the maximum pressure drop within 1 minute of operation of the engine, kg/cm 2

0,05


Stromberg carburetor

On  engines M 102.920 and 939, M 115.954 the single-chamber horizontal carburetor with constant depression  of Stromberg 175 CDT was installed.


Tarirovochny data

Characteristic

Value

Marking of the dosing needle

UC

Marking of the main fuel jet

100

Marking of a fuel jet of idling

50

Marking of an air jet of idling

115

Diameter of an opening of the needle valve, mm

2,25

Marking of a cover of the starting arrangement

200

Fuel level in the float-operated camera, mm

18 — 19

Mass of a float,

11,8 — 13

Oil brand in the piston shock-absorber

ATF

Capacity of the shock-absorber of the piston, cm 3

30

Thickness of laying of the needle valve, mm

1,5

Starting gap of the air gate, mm

5,3±0,3

Fuel supply by the accelerating pump for 1 cycle, cm 3

1,9±0,15

Frequency of rotation of a bent shaft of the engine at the disconnected hose of the vacuum regulator, rpm

1250±50

Gap between the lever and the adjusting screw of the vacuum regulator, mm

0,5

Frequency of rotation of a bent shaft idling, rpm

800±50

Content of carbon monoxide in the fulfilled gases, %

1,0±0,5

Frequency of rotation of a bent shaft on accelerated single to the course at an oil temperature in the engine of 75 — 85 °C and position of the sector of the starting arrangement on the 2nd profile of a groove, rpm

1700±100

Content of carbon monoxide (SO) in the fulfilled gases on accelerated single to the course at an oil temperature in the engine of 75 — 85 °C and position of the sector of the starting arrangement on the 2nd profile of a groove, %

6±1

Endurance of time of the electromagnetic locking valve, with

6 — 16


Solex DVG carburetor of type 4A1

On  engines M 123.920, M 123.921, M 115.938 and the M 110.923 was established the Solex DVG carburetor of type 4A1. The carburetor of emulsion type, two-chamber, with consecutive opening of butterfly valves, with the automatic starting arrangement and the thermostatic auxiliary starting arrangement (for launch of the heated-up engine). On compulsory single to the course the economizer of compulsory idling turns on.

Characteristic

Value

Index of carburetors

  • M 115

Е 17481 (Е 17703) *

  • M 123

Е 17482 (Е 17704)

  • M 110

Е 17603

* In brackets the index of the carburetors installed on models with the automatic transmission without vacuum regulator of ignition is specified.

From 1980 model years some characteristics of the Solex 4A1 carburetor are changed.

Characteristic

Value

Fuel supply by the accelerating pump for 1 cycle, cm 3

0,7±0,15

Marking of an air jet of idling

125

Marking of a spray of the accelerating pump

50

Starting gaps of the air gate, mm

  • I step

1,1

  • II step

4,2±0,2

Half-open of the air gate, mm

0,3 — 0,8


Tarirovochny data of the Solex 4A1 carburetor
Indicator
Model of the 200 car
1st camera
2nd camera

Diameter of the diffuser, mm

20

54

Diameter of an opening of the needle valve, mm

2,0

The main dosing system

  • marking of a fuel jet

x 97,5

B5 *

  • marking of an air jet

2,147

3,747

System of idling

  • marking of a fuel jet

42,5

  • marking of an air jet

120

Accelerating pump

  • supply of fuel for 1 cycle, cm 3

0,6±0,15

Mass of a float,

6,8±0,35

Starting gaps, mm

  • air gate I of a step

3,2

  • air gate II of a step

4,2±0,2

  • butterfly valve

2,9±0,2

Content of carbon monoxide (SO) in the fulfilled gases

0,5 — 1,5

Frequency of rotation of a bent shaft idling, rpm

850 — 950

Indicator
Model of the 250 car
1st camera
2nd camera

Diameter of the diffuser, mm

20

54

Diameter of an opening of the needle valve, mm

2,0

The main dosing system

  • marking of a fuel jet

x 97,5

B7 *

  • marking of an air jet

2,147

3,747

System of idling

  • marking of a fuel jet

42,5

  • marking of an air jet

115

Accelerating pump

  • supply of fuel for 1 cycle, cm 3

0,7±0,15

Mass of a float,

6,8±0,35

Starting gaps, mm

  • air gate I of a step

3,2

  • air gate II of a step

4,2±0,2

  • butterfly valve

2,9±0,2

Content of carbon monoxide (SO) in the fulfilled gases

0,5 — 1,5

Frequency of rotation of a bent shaft idling, rpm

850 — 950

Indicator
Model of the 280 car
1st camera
2nd camera

Diameter of the diffuser, mm

20

54

Diameter of an opening of the needle valve, mm

2,0

The main dosing system

  • marking of a fuel jet

x 97,5

B5 *

  • marking of an air jet

90

System of idling

  • marking of a fuel jet

42,5

  • marking of an air jet

110

Accelerating pump

  • supply of fuel for 1 cycle, cm 3

0,65±0,15

Mass of a float,

6,8±0,35

Starting gaps, mm

  • air gate I of a step

3,2

  • air gate II of a step

4,2±0,2

  • butterfly valve

2,9±0,2

Content of carbon monoxide (SO) in the fulfilled gases

0,5 — 1,5

Frequency of rotation of a bent shaft idling, rpm

800 — 900

   

* Marking of a needle of a jet.


Electromagnetic locking valve

Characteristic

Value

Brand and type

Pierburg of PE 20 273

Course of a needle of the valve, mm

2,5±0,05

Rated voltage, In

12

The most admissible tension, In

16

The consumed current at a tension on conclusions of 12 V, And

0,25±0,02


Vacuum regulator

Characteristic

Value

Brand and type

Pierburg of PE 20 464


Thermal valve of decrease in toxicity of the fulfilled gases

Characteristic

Value

Brand and type

Texas Instruments CARP or Pierburg PE 20213

Temperature of opening of the valve, °C

30±3

Temperature of closing of the valve, °C

20±3