The operational conditions and wear of elements in selfstarter of new generation for combustion engine

• Autorzy: Siczek K.
• Konferencja: Kongres Silników Spalinowych (20-23.05.2007; Kraków, Poland)
• Języki publikacji: PL

Abstrakty

EN

The selfstarters of new generation are applicable in combustion engines more commonly. They differ from classical selfstarters which are simply the range electrical engines. The greatest producers of the selfstarters are Bosch, Valeo, Delco and Hitachi. The first characteristic feature of the selfstarters is using of magnetic field from sintered magnets forto selfstarter excitation. The second characteristic feature is using planetary gear, built in the selfstarter. It is difficult to find the technical characteristics of selfstarters in available literature. Because of it, it is necessary to measure such characteristics experimentally or to calculate it by, for example, Finite Element Method. The examplary characteristic of selfstarter, manufactured by Bosch, has been calculated and presented in the article. The wear of selfstarter bearing appears during a work of selfstarter. The wear depends on operational conditions of moving elements of selfstarter. The wear especially depends on loading, relative velocity and temperature. Knowing geometrical parameters and material parameters, for example from literature, and having calculated characteristic of selfstarter it is possible to value the loading, relative velocity and temperature of co-working elements in the selfstarter. It can be done, with earlier processed model. The model have been done with using of Finite Element Method. The subsidiary mathematical models have been used for calculation, as well. The results of computation have been placed in the article. The pictures of wear of chosen elements of selfstarter has been presented in the article either. The most loaded bearing of selfstarter is the front one. The value of bearing reaction can be equal 500 N and more. The area stress in the bearing can be equal 50 MPa, when the axis of shaft and the axis of bearing bush are parallel. The area stress in bearing can be equal near 120 MPa, when the axis of shaft and the axis of bearing bush are non parallel. The area stress in bearing of rotor can be equal 10 MPa. The relative velocity in front bearing can be equal 1.8 m/s. The relative velocity in rotor bearing can be 10 m/s. The temperature of selfstarter bearings can equal the temperature of environment. The temperature of rotor coils can be equal 325 K and more. Because of wear of bearing it is possible that the rotor can impact sintered magnets of selfstarter.

Słowa kluczowe

PL

silnik spalinowy; rozrusznik; czop; panewka

EN

combustion engine; car selfstarter; sintered magnets; operational conditions; wear

• Wydawca: Polskie Towarzystwo Naukowe Silników Spalinowych
• Czasopismo: Silniki Spalinowe
• Rocznik: 2007
• Tom: R. 46, nr SC1
• Strony: 212--226
• Opis fizyczny: Bibliogr. 4 poz.

Twórcy

autor

Siczek K.

• The Technical University of Lodz, Poland

Bibliografia

• [1] Koziej E., "Maszyny elektryczne pojazdów samochodowych", WNT, Warszawa, 1984
• [2] Ansys v.10.0 documentation, help on-line
• [3] Siczek K., "Badania trwałości ponaprawczej ślizgowych łożysk rozrusznika", rozprawa doktorska, Politechnika Poznańska, 2003
• [4] Staniszewski B., "Termodynamika", PWN, Warszawa, 1986