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Version
1.3.1
Size
812.23 Mb
Updated
3 years ago
Released
31 Jul 2020
Description
Learn how LSPI affects your engine and how to carefully choose the right engine oil with the LSPI Impact app.
This app is optimized for the iPad but also works on any other iOS device. LIQUI MOLY: LSPI Impact is available in English and helps to explain Low Speed Pre-Ignition
LSPI (= Low Speed Pre-Ignition) or SPI (Stochastic Pre-Ignition) describes the unwanted pre-ignition that occurs stochastically in the combustion chamber. It occurs at high load and low engine speed in turbocharged engines with direct injection before the spark plugs begin to spark.
This problem is caused by the downsizing of engines, which means that modern engines have less displacement but are still supposed to deliver the same or even greater power.
The cause of LSPI probably lies in the motor oil, tiny quantities of which get into the combustion chamber, where they are ignited in the compression process. The combustion flashes over to the fuel/air mixture and results in heavy engine knocking.
Carbon deposits are also considered a significant factor in LSPI. Modern, direct injection turbocharged gasoline engines have a highly stressed injection system. The injection nozzles extend directly into the combustion chamber, so they are exposed to high temperatures, pressures and the influence of combustion residues. Deposits form rapidly at the nozzle outlets. Due to the high temperatures, the particle deposits can start to glow and ignite, which can lead to engine knocking. With LSPI the pressure in the combustion chamber is about three times that for normal combustion. The extreme pressure means that massive piston damage can occur within a short space of time.
Estimates
Availability
Devices
iPhone5s
iPadAir
iPadAirCellular
iPadMiniRetina
iPadMiniRetinaCellular
iPhone6
iPhone6Plus
iPadAir2
iPadAir2Cellular
iPadMini3
iPadMini3Cellular
iPodTouchSixthGen
iPhone6s
iPhone6sPlus
iPadMini4
iPadMini4Cellular
iPadPro
iPadProCellular
iPadPro97
iPadPro97Cellular
iPhoneSE
iPhone7
iPhone7Plus
iPad611
iPad612
iPad71
iPad72
iPad73
iPad74
iPhone8
iPhone8Plus
iPhoneX
iPad75
iPad76
iPhoneXS
iPhoneXSMax
iPhoneXR
iPad812
iPad834
iPad856
iPad878
iPadMini5
iPadMini5Cellular
iPadAir3
iPadAir3Cellular
iPodTouchSeventhGen
iPhone11
iPhone11Pro
iPadSeventhGen
iPadSeventhGenCellular
iPhone11ProMax
iPhoneSESecondGen
iPadProSecondGen
iPadProSecondGenCellular
iPadProFourthGen
iPadProFourthGenCellular
Pricing by country
| Country | Price |
|---|---|
| Canada | free |
| China | free |
| France | free |
| Germany | free |
| Italy | free |
| Netherlands | free |
| Portugal | free |
| Spain | free |
| UK | free |
| India | free |
| Japan | free |
| Korea, Republic Of | free |
| Poland | free |
| Russia | free |
| Turkey | free |
| USA | free |
| Ukraine | free |
