【 Master Bang online 】 How to solve the problem of low speed early burning?

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【 Master Bang online 】 How to solve the problem of low speed early burning?

Hello, everyone

Master Bang and everyone meet again

In this issue, I'll tell you about it

How to solve

Low speed early ignition (LPSI) problem

Strong power, can save money

Turbocharged direct injection engine on line

Related models have become the "new darling" of the passenger car consumer market.

At the same time as the popularity

Subject to its own mechanical structure, material application, etc

Turbocharged direct injection engine

The resulting low speed early ignition (LPSI) problem

Also let a lot of riders discouraged

So, what is low-speed premature ignition?

What is low speed early ignition

Low Speed Early ignition (LSPI), full name of "low speed high torque early ignition", refers to spark ignition turbocharged engines, especially direct injection engines.

Under large load and low speed conditions, when the speed is not high (usually 1000-2500 RPM range) and the torque output is high, the mixture of fuel and oil spontaneous combustion occurs before the spark plug normal ignition.

Low-speed early combustion is easy to occur in the models using Turbo and GDI technology, which is manifested as the engine emits sudden explosion sound, engine overheating and power reduction.

During the intake stroke, the nozzle sprays oil mist into the cylinder at an Angle facing the cylinder wall, where a portion of the fuel reacts directly with the residual film of the oil. When the fuel and residual oil film mixture is liquefied, it will be scraped against the rising piston during the compression stroke and form droplets.

In the process of the piston rising, the combustion chamber will reach the mixed liquid combustion conditions, resulting in unexpected combustion pressure shock wave, that is, low-speed early ignition phenomenon.

Simply put, in the compression stroke, the piston has not reached the top dead center, and the oil thrown from the cylinder wall has ignited the gasoline in advance.

The harm of low speed early ignition

Low-speed early combustion mainly disrupts the working rhythm of the original engine. When low-speed early ignition occurs repeatedly, the pressure in the cylinder increases sharply, and the huge pressure will cause damage to the inner moving parts of the engine and the engine structure, which may cause some pistons to break completely.

In addition, Master Bang told you that although early burning may not necessarily lead to detonation, as long as the engine is knocked, there is 100% early burning phenomenon.

How to solve low speed early ignition

There are many reasons for premature combustion, which are related to many factors such as intake air temperature, fuel quality, oil quality and engine design.

In terms of lubricants, in order to prevent low-speed early combustion, the SP and GF-6 gasoline engine specifications launched by the American Petroleum Institute (API) and the International Lubricant Standardization and Certification Committee (ILSAC) in May 2020.

Compared with the previous specifications, the low-speed early ignition test is added in order to improve the low-speed early ignition phenomenon of the engine from the lubricating oil.

Choosing a suitable engine oil can effectively reduce the incidence of low-speed premature combustion and better protect the car. Ribang SP/ GF-6 lubricants, fully synthetic products, higher quality. Both SP/GF-6 products have excellent wear resistance and can effectively inhibit low-speed early ignition.

And in terms of fuel economy, it also has excellent results, low sulfur, low phosphorus, low ash, low sulfate, ultra-low emissions, perfect for national six models, and protect the particle catcher.

If you want to prevent your car from burning early at low speed, then choose these two SP/GF-6 fully synthetic oil from Nippon!