Early and later ignition: signs. How to determine early or late ignition, which is better?

On whether the correct timing of the ignition, depends on the efficiency and economy of the internal combustion engine. Setting the angle of ignition - this, according to many mechanics, is the most important operation in the process of tuning the powertrain. If it is wrong to expose it, and it can be either in the direction of reduction or advancement, then this will immediately affect the operation of the motor. This operation should be taken very seriously. When making settings, you should try not to allow too early or, conversely, late ignition. Let's see how the early and later ignition is fraught with engine work, and we also learn how to determine the angle.

Characteristics of the trambler and its nodes

On gasoline engines, there are a number of nodes and mechanisms that are responsible for the timely supply of voltage to the spark plug so that it can form a spark. Subsequently, it can ignite the fuel mixture. These components are a separate mechanism. In carburetor and some injector cars, these functions are performed by a trampler or a breaker-distributor. It is in the block of cylinders. The camshaft is driven by the engine's camshaft. The distributor shaft has special cams. Their main task is to unmask the target at the right time. After this opening, a spark will appear on the spark plug. If it is produced earlier (ahead of time), then the energy of the gases for a certain period of time will work towards the movement of the piston. If the spark is late, the energy will go behind the outgoing piston and can not be realized to the fullest. Thus, early and later ignition is an inefficient operation of ICE. The Trembler has a serious drawback. This wear of its mechanical elements, as a result of which the quality and the moment of the spark supply change. This will definitely affect the operation of the power unit. After a while it will require setting the angle of ignition.

Symptoms of early ignition

For those who do not know how to determine early or late ignition, these symptoms will greatly help. So, in the course of engine operation, chimes, metal noises and knocking of the engine cylinders will be heard. At this point, the engine is experiencing significant overload, and bearings wear out more. Also, there will be a sharp decrease in efficiency and efficiency of the unit, the number of revolutions of the crankshaft will decrease. The thrust disappears. Naturally, fuel consumption will increase and all mechanisms will wear out more intensively. Also, early ignition can be diagnosed by explosive ignition of the mixture at the time of high loads.

Symptoms of late ignition

How to define it? The main signs of early and late ignition in some points are similar. There is also an increased fuel consumption. There is a loss of power. But a late point can be distinguished by a higher level of carbon deposit in the combustion chamber, and also by the temperature of the engine. It will overheat.

Early or late?

Early and later ignition is bad for the motor. But there are motorists who own domestic cars, which deliberately expose a slightly different angle for starting and warming up the engine. Others regulate the moment of ignition so that it was earlier. Not more than one division. This gives the best dynamic performance at high revs. But at low revs the power will noticeably sag. It can not be said that it's better - early or later ignition. Both in the first and in the second case it is necessary to start from the goals. It should be determined exactly - stable and efficient operation or increased dynamics and rapid wear of engine components.

If the car is on gas

The composition of the fuel is different, and consequently it is consumed much more quickly. Another gas has a higher octane number. Therefore, a mixture based on such fuel will continue to burn during the release phase. This will have a negative temperature effect on the exhaust system. One of the important tasks is to optimize the ignition and combustion of the gas fuel mixture. And if you properly adjust the angle, then you can still save. Therefore, it is necessary to know which ignition is better - earlier or later for gas. In the case of HBO, they exhibit an earlier one. Thus, the mixture has time to burn out before the exhaust path is opened. This will not spoil the motor parts, do not overheat the exhaust system, will make the engine work more economical and efficient.

Diesel engines

Symptoms indicating early and late ignition for gasoline engines are also relevant for diesel engines. But due to another principle of the diesel power unit, the reasons should be considered in a slightly different way. The main difference between diesel internal combustion engines and petrol ones is the method of ignition of the mixture. In the first type of internal combustion engine, the air-fuel mixture ignites due to pressure and hot air. The ignition adjustment in the diesel power unit is the adjustment of the desired injection time. Fuel should be fed into the combustion chamber at the very top of the compression phase. If the angle is incorrect, the fuel is not delivered in time. This leads to an imbalance in the operation of the motor and to non-optimal combustion. In the diesel engine, the main element is the injection pump. Together with the injectors, he performs the task of dosing and supplying fuel to the combustion chambers. Owners of such cars need to know how to check early or later ignition in diesel. The injection angle is controlled by the displacement of the injection pump. Not always there are the necessary labels. Therefore, the work is done by experience. Remove the high-pressure tube from any injector, and in its place put on another, transparent. Next, measure the upper limit of the fuel in it at the time of ignition. On the pulley, set the desired mark. Then, the crankshaft and camshafts are adjusted to the marks.

How to check the angle on the carburetor?

For the carburetor engine, early and later ignition can be checked using a strobe and a warning lamp. For testing with a test lamp, it is connected in parallel to the condenser. Then, through the crank, rotate the crankshaft. Do this until the plate on the rotor is as close as possible to the contact located on the cover of the switch. While the lamp does not light up, crankshaft slowly turn. The labels on it and on the distributor must coincide. If the lamp lights up before the marks match, or after that, the ignition is not set correctly. There is another way to determine early or late ignition in diesel. A stroboscope will be used. The device is included in the ignition system. Then the engine starts and must run at idle. The strobe is sent to the crankshaft pulley in such a way that the lamp illuminates the marks. Since it flashes at the moment of giving a spark in the first cylinder, the mark on the pulley will be fixed. If the angle is set correctly, the labels will match. Otherwise, adjustment is required.

How to check the timing of the ignition on the fly?

This is another way how to find out later or early ignition. They can be used if there is no stroboscope and a control lamp at hand. It is necessary to go out on the highway, accelerate the car and go on the fourth gear. The speed should be maintained within 50 km / h. Then, with a sharp movement, press the brake. If after this there will be quiet and brief sounds of detonation, then the moment of ignition is established correctly. If the sounds are loud, then it is early. If they are completely absent, then this is the late corner.

The result

Problems with ignition do not carry the owner of the car any good. Small deviations from the norm are not critical. However, over time, the engine will work less efficiently. Periodically it is recommended to regulate the moment of ignition.