Winter temperatures are cold, the engine cold start, every day must face things. For the cold start operation of vehicles, two of the country's traditional (large pump) mechanical high-pressure oil pump and the country three (high-pressure common rail or pump nozzle) emissions of diesel engines have different countermeasures.

No matter what kind of engine, when the cold start in winter, it will inevitably encounter difficulties in the case of the start, leading to this situation, mainly because the diesel engine compression ignition necessary conditions are not available.

When the diesel engine starts, the compression combustion process is simple, and there are three factors that play a key role:

The air is compressed rapidly by the movement of the piston, producing enormous heat

Diesel oil is atomized by high-pressure pipeline to produce atomization

The piston in the cylinder is driven by a starter to operate at a high speed

Winter diesel engine difficult to start, cast aside Baotou North rush heavy truck parts, the engine itself, mechanical failure and wear, corresponding to the above factors are three points, namely, air cold, diesel thick, slow operation.

Air cooling configuration preheating device

1, flame preheater (non electric control engine)

At present three emissions of many non electronically controlled engine are filled with similar flame preheater in the early two era, through the burning of diesel in the inlet air temperature for heating. Winter in advance to start Baotou beiben heavy truck accessories flame preheater, glow plug began to work to complete the whole process of heating fuel injection ignition.

It should be noted that the flame preheater works normally, and the diesel must ensure that the mark matches the temperature, the flow is normal, and the battery is sufficient to heat the ignition plug.

At present, the country's three non electronic control engine, -20 degrees (in the article to Celsius), the temperature in fuel labeling meet, sufficient electricity, can start smoothly, without special operation.

2 、 electric heating air preheater (electric control engine)

The electric heating air preheater is widely used in the control electronic fuel injection engine of the country three. The working principle is similar to that of the household electric stove".

Installed at the air inlet pipe interface, after the power is switched on, the metal net is quickly burned red to generate heat to achieve the purpose of heating the air.

Such devices are now produced by a number of parts manufacturers, and are also suitable for most types of engines currently in use in the country.

In refitting, it is necessary to note that the power supply line needs to be independently set up and equipped with relay control to ensure its safety.

3, a heating air intake manifold

Without any auxiliary heating installation of the diesel engine, can temporarily use a blowtorch heated intake manifold external, quickly start the engine hot air suction, but the heating effect of this kind of method, can rapid warming, torch can not tilt, there are security risks.

Diesel low-temperature thickening diesel preheating should be cautious

High pressure pipeline, only the heating part is high-pressure tubing, emergency external blowtorch uniform heating of the high-pressure oil pipe, mechanical in-line pump (two engine) the usual practice for electronic control engine in three, this approach is not desirable, will burn out the common rail and other accessories.

The correct way is to use hot towel wring dry, repeated hot compress, hand contact with heat can be, pay attention not to touch the electrical wiring and high pressure common rail parts, so as not to cause damage.

Turn on the slow running power and oil to find the reason

1, a heating oil pan

A heating oil pan is a traditional method of old truck driver, even if the replacement of oil in the winter, extreme weather, still need the oil heating treatment.

"Open fire" heating oil tank should pay attention to fire, so as not to cause electrical wiring, air pressure pipeline damage.

2 、 deceleration starter and accumulator

Slow start machine is now the standard configuration of most mainframe plants. At present, a lot of cheap compact trucks are still equipped with ordinary starting machines, which should be replaced under economic conditions.

Slow start machine means accurate low speed and big torque starter. Through the planetary gear or reduction gear to achieve low current, high torque effect. The principle is similar to the difference between the gearbox's direct gear and the first gear. It is equivalent to changing the speed ratio.

Baotou North rush truck accessories batteries should be timely maintenance, some factory configuration of the storage capacity is too small, if necessary, the replacement of large capacity batteries. Through the electrical parts of the vehicle and the normal continuous (ten seconds) started more than 20 times about the excellent state.

Some of the measures, strictly speaking, only some emergency measures, the diesel engine cold start, should absolutely avoid the use of "starting fluid", starting liquid containing ether composition, a preheating device inlet in use will cause an explosion, start the liquid "deflagration" will cause the knock, accelerate parts wear serious when the life ring fracture, cylinder injury accidents.

Normal low temperature start-up, starting machine running, such as the engine has a "car" phenomenon, may appropriately extend the start-up time. At present, many of the state three engines are equipped with starting protection devices, and the starting machine will operate automatically for 10 seconds or so. Therefore, it is very important to start the warm-up, oil supply and other preliminary preparations at the time of starting.