Generator VAZ 2112 - generator device, repair, replacement

The native generator of the KATEK brand provides a current of 80A. This power is quite enough to provide standard power for all electrical appliances provided by the manufacturer. The safety margin of the original generator is designed for a range of 140 thousand kilometers. With normal consumer use of the car, this is about 10 years of uninterrupted service of the generator.

However, equipping a car with an acoustic system with powerful speakers, air conditioning, chargers, fog lights, additional heating and other necessary and not so necessary equipment makes you think about a more powerful generator. A current of 80A cannot meet the increased energy supply needs. The battery suffers from this, there is no full recharging, and it breaks down very quickly.

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The service life of a generator varies greatly and depends on the quality of its workmanship. For example, a standard generator can last 140 thousand km, which is almost 10 years of operation.

Which generator is better to choose? First, decide on the manufacturer. It is much easier to find spare parts for Russian generators, while for unpopular generators it is almost impossible to find a replacement for a broken part. Decide on the current strength. From the factory, the tens generator has a current strength of 80A, this is quite enough even if there are additional current consumers. If the generator is missing, then first try to inspect it and clean the contacts. Powerful 120A generators are installed, as a rule, when the car has “strong” acoustics; they do not harm the battery. Anyone who wants to install a 3-level voltage regulator (VR) in the future is recommended to first determine on the manufacturer’s website which generators it is structurally compatible with. They say that generators with the numbers -03- at the end of the model number have a new model LV, which is better than the old one. Also, pay attention to the presence of a guarantee, then you can easily exchange the generator for a new one in case of a defect. By the way, the defect rate of generators is almost 25-50%!

How does he work

First, let's figure out how this device functions. His work scheme is as follows:

• The key is inserted into the ignition switch;
• The current goes to the excitation wires;
• The magnetic field created by the armature passes through the stator windings, and voltage appears at its terminals;
• When the armature rotation frequency becomes high enough, the self-excitation mode begins;
• The rectifier unit provided by the car design converts alternating current into direct current;
• The voltage regulator starts working when the crankshaft rotation speed changes, and the time for which the excitation wire is activated is adjusted.

The presented video will allow you to clearly get acquainted with the principle of operation of the generator.

Functions

Beginners are very interested in the most important question, without which there is no point in trying to fix something on their own - what is the generator used for.

First of all, the generator’s task is to provide energy to all electrically dependent equipment.

The mistake many people make is that the equipment is powered by a battery. The battery is needed to maintain the functionality of the devices when the engine is turned off. It powers the audio system, alarm system, etc.

When the engine is started with the help of the battery, all the reins of power pass to the generator. He is now responsible for the operation of the audio system, air conditioning, power windows, etc.

The second, but no less important task of the battery is to recharge the battery. This happens when the engine is running. If it were not for the generator, the battery would not be able to provide power to all consumers for a long time; it would have to be charged regularly in the garage.

Scheme

Design Features

A standard generator for AvtoVAZ JSC cars consists of the following elements:

1. Back and front covers.
2. Air intake.
3. Brush holder.
4. Rectifier block.
5. Stator.
6. Capacitor.
7. Voltage regulator.
8. Pulley.
9. Rotor.

Some electric generators do not have a built-in voltage regulator. For example, this element is missing in generators for the VAZ-2101.

Signs of bearing failure and diagnosis

You can understand that the bearing in the generator has failed by the following characteristic signs:

• when the engine is running, a hum, whistle or grinding noise is heard from under the hood;
• the generator is hot to the touch when the engine is running or immediately after stopping it;
• The device pulley rotates.

In addition, some other symptoms may indicate this problem. And the ones mentioned above do not always indicate a bearing malfunction.

Comparison of worn bearings (left) with new ones (right)

The bearings in the generator can wear out due to time, lack of lubrication or poor quality, and also due to too much belt tension. The latter is usually typical for front bearings.

In order to accurately verify the failure of this element, you need to carry out simple diagnostics. Simply remove the alternator belt and start the engine.

If the extraneous sounds disappear, it means that the bearing is faulty. With the engine off, you can slightly shake the generator up and down by grabbing its pulley. In this case, no backlash should be felt. You can find out which bearing should be replaced after disassembling and inspecting all the elements. It's often better to buy a kit right away just in case.

Types of generators

There are different types of generators for VAZ cars depending on their design. The most common generators are compact in size - 94.3701 and others.

Owners of Russian-made cars install brushless inductor-type generators. For example, devices modification 955.3701. Such generators differ from traditional equipment by the presence of permanent magnets on the rotor and field windings on the stator. Thanks to this, the design of the generator set does not contain slip rings and an alkaline unit, which is one of the most vulnerable and poorly protected.

Interchangeability of autogenerators

Interchangeability of generators for Lada cars is achieved if the following requirements are met:

• the main technical characteristics of the installed generator are not lower than those of the device being replaced;
• the gear ratio from the internal combustion engine to the generator is the same;
• the devices have similar electrical circuits;
• The new generator is suitable in terms of weight and dimensions and type of fasteners.

Most Russian-made automobile generators have a 2-leg mount. These fasteners are found on both covers. For equipment of foreign brands, installation is carried out using 1 paw, the fasteners are located on the front cover.

In order to correctly install and securely fasten a foreign generator in a car from AvtoVAZ, it is necessary to replace the bracket.

Withdrawal procedure

1. First of all, remove the belt from the generator.

2. Disconnect the block from terminal “D” of the generator.

3. Remove the protective cover, unscrew the nut and disconnect the wires from terminal “B+”.

4. Unscrew the tension bolt.

5. Unscrew the top mount of the generator.

6.Remove the tension bar.

7. Unscrew the lower mount of the generator.

8. Remove the spacer bushing.

9. Remove the generator mounting bolt and remove it.

About the current-speed characteristic

TLC is the dependence of the current supplied by a car generator to the on-board network on the rotor speed at a constant voltage. This parameter is calculated when the device is operated together with a charged and serviceable battery with a rated capacity of at least 50% of the rated current of the generator. The characteristic is calculated in the heated and cold states of the equipment.

Main consumer characteristics

1. Maximum current.
2. The magnitude of the operating voltage.
3. Rated power.
4. Gear ratio.
5. Efficiency
6. Dimensions and weight.

The main operating parameters, type and brand are usually indicated on the device label.

Criteria for choosing car generators

1. Maximum power . Power is one of the main characteristics of VAZ generators. It must ensure an uninterrupted supply of current and supply electricity to the battery, which is discharged due to the operation of regular electricity consumers at low speeds of the power unit. To perform basic tasks, the device must have the required power. The required indicator is indicated in the vehicle operating instructions.
2. Current strength . The factory generator installed in the car is not designed for a large number of additional consumers, but at the same time it has a certain reserve. If the autogenerator is “not enough,” then before purchasing a new device, first inspect the old equipment, clean the contacts, check the bearings, etc. You shouldn't use 120A generators in every car. First of all, it's expensive. Secondly, the current may be excessive. Such power-generating devices are installed in tuned cars with a powerful acoustic system.
3. Dimensions . Before purchasing, it is also worth comparing generators by overall dimensions. The device must be compact with high technical characteristics.
4. Noise level . The generator should not make too much noise during operation. This “disease” often affects high-power generators that are sold at a low price. One of the main reasons for the appearance of extraneous sounds (hum) is the poor quality of bearings, which wear out quickly.
5. Availability of guarantee . If there is a warranty, you can exchange a faulty device for a new one if it is defective.

Installing new items

Before replacing worn VAZ-2110 bearings on your own, it doesn’t hurt to check the presence of lubricant in the newly purchased parts. To do this, you need to pry up and remove one of the plastic protective covers of the separator with a sharp object. If necessary, add lubricant and replace the cover. Then you can start replacing, for which you will need a standard set of keys and tools available to every business car enthusiast.

It is most convenient to dismantle the rear bearing of the generator using a puller, but if this is not available, a regular open-end wrench measuring 22-27 mm will do.

It is better to remove the generator from the car from the inspection ditch in the following sequence:

1. Disconnect the battery and disconnect the wires from the contacts of the unit by unscrewing the fastening nuts with a 10 mm wrench.
2. Unscrew the belt tensioner bolt, loosen it and remove it from the generator pulley. Remove the tensioner bar.
3. Using a 13 mm wrench, loosen and unscrew the nut of the lower support of the unit. Remove the bolt and remove the generator from the car.

According to the manufacturer’s recommendation, replacing the VAZ-Ten generator bearing located at the front should be carried out together with the cover into which it is pressed. But there is no point in changing the cover if it is in good condition, which should be ensured before disassembling. And such a replacement will cost more.

The main thing that needs to be done carefully when performing further work is to remove the old bearings. The procedure is as follows:

1. Place marks on the body and covers of the unit to indicate the relative positions of the parts. Unscrew the bolts holding the covers together with the body (4 pcs.).
2. Use a flat-head screwdriver to separate the housing parts. Remove the back cover along with the winding.
3. The front bearing is knocked out of the cover through a round insert. This must be done carefully so that the lid does not crack, otherwise it will have to be replaced.
4. Remove the rear bearing using a puller or an open-end wrench inserted vertically at one end between the part and the rotor. Tapping the key with a hammer and moving it around the axis, gradually knock down the bearing.

New elements are pressed into place with a hammer using old bearings as guides. Then the unit is assembled and installed on the car.

Source

Which generators are better to put on a VAZ?

Below are recommendations for different models of domestically produced cars.

VAZ - 2106

G-222 is a more powerful and stable self-generator compared to the standard G-221. It has a built-in battery charging relay and increased output (50 A versus 42 A), suitable for the “six”, provided that brushes from the G-221 are used or the connection diagram is changed.

VAZ - 2107

The simplest option for modernizing the electrical network is the G-222 device. The generator is installed in the VAZ-2107 without additional problems. This car will fit a device with a current of 55A from model 2108. The only modification that will be needed during installation is the use of an additional power relay.

VAZ - 2110

The standard generator of the VAZ-2110 is KZATE with a current of 80 A. It has a factory index of 5102.3771. Estimated mileage is 140,000 km. As alternative options, it is worth considering devices 94.3701 and 120 A. It is better to install the second generator on a VAZ 2110 with an injection engine in cars with a large amount of additional equipment, in addition to a DVR and a powerful sound system.

VAZ - 2112 and 2114

It is better to install a generator from Priora or Kalina with air conditioning in VAZ-2112 and VAZ-2114 cars. This device produces a power of 115 A, which is 35 A more than the factory equipment. The only difficulty that the owner of 2114 will encounter during installation is the need to replace the pulley.

As an alternative, you can consider an Eldix brand autogenerator with a capacity of 115 A. However, it is difficult to find spare parts for it, which will cause certain difficulties even with minor breakdowns.

Cars with injection engines are equipped with generators with an output of 80A. This is the standard model 94.3701. To increase power, consider the option with KZATE 9402.3701 90A, which is suitable for the type of fastener and has a similar pulley. If necessary, ensure the operation of a large number of energy-consuming devices.

Priora

Video: GENERATOR FROM PRIORA FOR VAZ 2112.

A Russian or foreign-made generator can be installed in a Lada Priora car. One of the best options in terms of operational reliability is Bosch at 110 A. As a domestic analogue, you can consider KZATE 9402.3701-14 at 115 A.

For most cars from the Volzhsky plant, it is better to use Russian generator sets. Among the main advantages of domestic products, we note low cost, ease of maintenance and repair, and a large number of spare parts in stores. A better alternative is equipment from the German brand Bosch. It is better to avoid buying cheap Chinese electric generators.

Source

Generator VAZ 2110 8 valves brand 94.3701

A generator is a synchronous alternating current electrical device with electromagnetic excitation and a built-in rectifier using silicon diodes.

Design of the VAZ 2110 generator 8 valves brand 94.3701

The figure below shows a cross-section of a VAZ 2110 generator with 8 valves

Technical characteristics of generator 94.3701

• Maximum output current (at 13 V and rotor rotation 6000 min1), A - 80
• Voltage, V - 14.1 ±0.5
• The transmitted engine-generator ratio is 1:2.4
• Rotor rotation direction (drive side) - right

Components of the VAZ 2110 generator

Useful! VAZ 2110 fuse box

Generator device for VAZ 2110

The components of the VAZ 2110 generator device are laid out at the top. Their description is presented in this chapter

Rotor

The rotor shaft rotates in two bearings mounted in the covers. The lubricant added to the bearings at the factory is designed to last for the entire life of the generator. The rear bearing is placed on the rotor shaft and secured by the rear cover through a plastic sleeve. The front bearing is pressed and rolled into the front cover and changes along with it. Its inner race, together with the spacer ring and washer, is clamped by a nut between the pulley and the step on the rotor shaft. The back of the generator is covered with a plastic casing.

* - in case of uneven wear of the slip rings, grooving to a size not less than the minimum permissible diameter is allowed

Stator

The stator is mounted from metal plates connected by electric welding. Phase windings connected into a star are inserted into the internal cavities of the stator. The alternating voltage created in the stator winding is converted into constant voltage by a rectifying unit.

The stator and generator covers are secured with 4 screws.

The generator stator contains three-phase windings. The ends of the phase windings are connected to the rectifier bridge

The winding resistance must be less than 1 ohm. The windings must not have a short to ground.

Useful! Panel of VAZ VAZ 2110

Rectifier block

The rectifier unit is assembled using a bridge circuit and consists of six power limiting diodes. They are pressed into two horseshoe-shaped aluminum radiator plates. One plate contains three additional diodes, through which electric current is supplied to the excitation winding of the generator after the engine is started. The plates are assembled into a rectifier block.

Generator relay VAZ 2110

The figure below shows a general view of the VAZ 2110 generator relay

The voltage regulator is electronic integral. It is combined with brushes. The voltage regulator is non-separable and cannot be repaired. If it breaks, it must be replaced. It is attached to the rear tire of the generator.

Noise suppression capacitor brand K73—21V-100V-2.2uF

K73-21V 100V 2.2 uF class “X” capacitor is designed to suppress industrial radio interference in the frequency range from 0.1 to 100 MHz in circuits of direct, alternating and pulsating currents. K73-21V sealed polyethylene terephthalate capacitors. Available in a metal case.

Parameters and characteristics of capacitor K73-21V 100V 2.2 µF:

• Rated voltage: 100V;
• Nominal capacity: 2.2 µF;
• Permissible deviations of capacity: ±20%;
• Operating temperature range: -60 … +100 °C;
• Loss tangent: no more than 0.012;
• Operating hours: 10000 hours;
• Shelf life: 12 years.

Generator pulley VAZ 2110

On the VAZ 2110 car generator, a pulley is installed under the ridge belt. Its design is shown below:

VAZ 2110 generator pulley diameter:

• Inner diameter - 15.03 mm

Generator brushes 2110

The brushes of the generator 2110 are graphite. The design of the brushes is shown below in the figure:

Generator brush brand:

• 2110-3701470;
• 2110-3701470-00.

Generator brush size 2110:

• Thickness - 4 mm;
• Height - 6 mm;
• Length - 18 mm.