The brand new KamAZ-6520 2022 pickup truck was shown for the first time in the photo: a platform from Mercedes for 1 million rubles

The operating order of Kamaz cylinders

/ Operating order of Kamaz cylinders

The main feature of the Kamaz 740 engine structure is the asymmetrical arrangement of the left row of pistons relative to the right one in such a way that the left piston group is extended 29.5 mm further. The fact is that there are two opposing connecting rods installed on the crankshaft journal, which determines the unique operating order of the Kamaz cylinders. The explosion sequence of the fuel mixture is the sequence 1→5→4→2→6→3→7→8.

Thanks to a shortened crankshaft with 8 pistons and 4 journals, the compression in the cylinders increased significantly, which in turn led to an increase in engine efficiency and power. The power in Kamaz 740 engines also increases due to the clearly tuned operation of the timing belt, including the valves.

What is the operating order of the Kamaz 740 cylinders?

According to the technical regulations of EU countries, the first cylinder in the Kamaz 740 engine is considered to be the one located in the right row at the front of the vehicle. This is usually called the master cylinder. The injectors have the same numbers as the cylinders on which they are installed. Therefore, the main injector corresponds to the master cylinder. Cylinder numbering starts from the right row, in which cylinders 1-4 are located. In the left row, cylinders 5-8 are respectively located. For both the right and left rows, the numbering starts from the front of the car.

The special design of the Kamaz 740 engine makes it significantly smaller than Russian engines and more reliable than foreign ones. Kamaz 740 is ideal for working in the harsh conditions of the continental climate of our country, since it is quite easy to start in the cold season.

Specifications

As noted earlier, if such a pickup truck is put into production, it is more likely that it will be based on a platform from Mercedes-Benz. Moreover, the choice will fall on a front-wheel drive trolley, which will be borrowed from the compact GLB crossover. In this case, the Russian new product will receive a 1.33-liter supercharged engine that produces up to 150 hp. useful power. The type of gearbox still raises questions. Perhaps the manufacturer will leave the KamAZ-6520 2022 pickup truck with a continuously variable variator, which is used, in particular, on the Renault Arkana, equipped with the same turbo engine. The option with a 6-band automatic transmission is not excluded. The new pickup truck from KamAZ will not receive all-wheel drive.

Internal processes

The functioning of the KamAZ installation is associated with the processes occurring in the chamber. Actions occur in a certain strict sequence with periodic repetition in each cylinder. The sum of processes is a work cycle consisting of periods of gas distribution.

During one sequence of working processes, one ignition of fuel is performed in the cylinder. The delay period, from one flash to the next, affects the smooth running of the power unit. The smaller the gap, the less vibration when the motor operates. Smoothness also depends on how many cylinders there are in the KamAZ. In our version we are talking about eight cameras. This is a reasonable number, since a large number of cameras leads to a longer interval between flashes and harsh operation of the motor. At the same time, an insufficient number of cameras does not provide the necessary power.

Catalog of spare parts for KamAZ-6520 (Euro-4) (6520-3902009 KD):

Our catalog contains all spare parts used in KamAZ-6520 (Euro-4).
Select the node you need. To make it easier to find spare parts for KamAZ-6520 (Euro-4), you can use the quick filter. Quick Filter by nodes:

• Engine
  Engine

  6520-1000261-41 Power unit, complete for installation on a vehicle

• 6520-1001000-60 Installation of power unit brackets
• 6520-1001005-60 Installation of the power unit
• 65115-1015265-10 Fuel tank
• 5320-1015384-10 Crane
• 6520-1080010-30 Lower hood of the engine compartment

• Transmission

  Clutch

  6520-1580004 Installation of soundproofing screen for gearbox

• 20.1600010-30 Clutch
• 5460-1600006-19 Installation of the pedal and clutch release drive
• 5460-1602008 Clutch pedal with bracket and master cylinder
• 6460-1602010 Clutch pedal
• 5320-1602510-10 Clutch master cylinder
• 5320-1602560 Clutch master cylinder reservoir

Spare parts diagrams and components are presented on the website for reference purposes! We do not sell all spare parts for KamAZ-6520 (Euro-4) presented in this list, but many of them.

Kamaz engine

The engine consists of crank and gas distribution mechanisms, as well as cooling, lubrication, power and control systems, and starting. With the help of a crank mechanism, the reciprocating movement of the pistons in the cylinders is converted into rotational movement of the crankshaft.

Rice. 1.1. Engine KamAZ-740.10 (basic model): a - longitudinal section, b - cross section; 1 - generator, 2 - low-pressure fuel pump, 3 - manual fuel pump, 4 - high-pressure fuel pump, 5 - automatic fuel injection advance clutch, 6 - drive coupling half of the high-pressure fuel pump drive, 7 - connecting pipe of the intake air ducts, 8 — fine fuel filter, 9 — camshaft, 10 — flywheel, 11 — flywheel housing, 12 — drain plug; 13 — oil pan, 14 — crankshaft, 15 — oil pump, 16 — fluid coupling drive shaft, 17 — generator drive pulley; 18 — fan blades, 19 — full-flow oil filter, 20 — oil filler neck, oil level indicator in the engine crankcase, 22 — centrifugal oil filter, 23 — transmission gearbox, 24 — front eye bolt, 25 — compressor, 26 — power steering pump at, 27 — rear eye bolt, 28 — left drainage pipe, 29 — flare plug, 30 — left air inlet pipe, 31 — injector, 32 — injector mounting bracket 33 — exhaust manifold pipe, 34 — exhaust manifold

The gas distribution mechanism promptly opens and closes the valves, which allow air into the cylinders and exhaust gases out of the cylinders.

The cooling system maintains the required thermal conditions of the engine.

The lubrication system supplies oil to the rubbing parts of the engine to reduce friction and wear.

The power system cleans and supplies air and fuel to the cylinders, and with the help of a regulator, it automatically regulates the flow (supply) of fuel into the combustion chamber depending on the engine load.

The diesel starting system is necessary to turn the crankshaft during startup.

Here we will describe a set of components of the KamAZ-740.10, KamAZ-7403.10 and KamAZ-7409.10 engines, explain the operating diagram and operating principle of their mechanisms and systems. The KamAZ-740.10 engine (Fig. 1) is a four-stroke liquid-cooled diesel engine with a V-shaped arrangement of eight cylinders; is the base for all engine modifications of the brand. The KamA3 engine - 7403.10 (Fig. 2) has increased power due to the use of gas turbine supercharging, in which part of the energy of the exhaust gases is used to compress air and force it into the cylinders. Gas diesel engine 7409.10 (Fig. 3) can operate both on natural gas with its ignition by a pilot dose of diesel fuel, and on diesel fuel in diesel mode.

Rice. 3. General view of the K.AMAZ-7403.10 turbocharged engine: 1 - connecting pipe, 2 - high-pressure fuel pump model 334, 3, air ducts, 4.7 - turbochargers, 6 - pipe, 8 - exhaust manifold, model 271 5 - inlet 9 - nozzle

Rice. 4. General view of the KamAZ-7409.10 engine (gas diesel): 1 - connecting pipe. 2, 10 — intake air ducts, 3 — high-pressure fuel pump model 335, 4 — individual compressor air cleaner, 5 — low-pressure reducer. 6 - solenoid valve with filter, 7 - control drive with gas dispenser, 8 - gas dispenser. 9 - mixer, 11 - speed control drive

The main design data and parameters of the engines are given in the technical specifications (the values ​​​​are given in parentheses when the engine is operating in diesel mode).

Technical characteristics of KamAZ engines

Not available: