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Design of Oil Pump for T158 Transfer Case
Gášek, Martin ; Jakubec, Josef (referee) ; Dvořáček, Jiří (advisor)
This master’s thesis deals with a new design of an oil pump for Tatra T158 transfer case. The new solution should replace earlier involute internal gear pump which is not able to provide sufficent lubrication. The main problem of the old design is a poor suction at low speeds of the vehicle. Gerotor type of the pump has been chosen. Its main advantages are a convenient specific flow rate and good volumetric efficency. In an analytic calculation of the pump gearing also important functional parameters have been checked, like a pressure angle, flow rate, flow irregularity, specific flow rate, specific slipping. A design with and without axial clearance compensation is introduced. Measurements on a test rig confirmed good suction ability even in low revs. Generated flow rate and pressure are improved. That is a good prerequisite for faster assembly of transfer case with no testing of each oil pump. The tests have not revealed any unexpected wear of parts of the pump so far. It is supposed an application of the new gerotor design in a serial production of T158 truck and other types in the future.
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Aditional modification of Subaru test engine ignition advance
Gášek, Martin ; Mazůrek, Ivan (referee) ; Strecker, Zbyněk (advisor)
This bachelor’s thesis deals with design and application of an additional vari-able ignition advance for Subaru Robin EH34 engine connected with an experimental station TecQuipment TD301. At the beginning, a basic theory for the ignition advan-ce is given. Then a way how to measure an ignition point and engine characteristics is described. Manufacturing and assembly of the mechanism is covered. In the end a comparison of p-V and p- diagrams for various ignition settings is done. Influence of power output is discussed.
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Design of Oil Pump for T158 Transfer Case
Gášek, Martin ; Jakubec, Josef (referee) ; Dvořáček, Jiří (advisor)
This master’s thesis deals with a new design of an oil pump for Tatra T158 transfer case. The new solution should replace earlier involute internal gear pump which is not able to provide sufficent lubrication. The main problem of the old design is a poor suction at low speeds of the vehicle. Gerotor type of the pump has been chosen. Its main advantages are a convenient specific flow rate and good volumetric efficency. In an analytic calculation of the pump gearing also important functional parameters have been checked, like a pressure angle, flow rate, flow irregularity, specific flow rate, specific slipping. A design with and without axial clearance compensation is introduced. Measurements on a test rig confirmed good suction ability even in low revs. Generated flow rate and pressure are improved. That is a good prerequisite for faster assembly of transfer case with no testing of each oil pump. The tests have not revealed any unexpected wear of parts of the pump so far. It is supposed an application of the new gerotor design in a serial production of T158 truck and other types in the future.
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|
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Aditional modification of Subaru test engine ignition advance
Gášek, Martin ; Mazůrek, Ivan (referee) ; Strecker, Zbyněk (advisor)
This bachelor’s thesis deals with design and application of an additional vari-able ignition advance for Subaru Robin EH34 engine connected with an experimental station TecQuipment TD301. At the beginning, a basic theory for the ignition advan-ce is given. Then a way how to measure an ignition point and engine characteristics is described. Manufacturing and assembly of the mechanism is covered. In the end a comparison of p-V and p- diagrams for various ignition settings is done. Influence of power output is discussed.
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