Hydraulics for steering and trimming of a sterndrive
(2014) MMK820 20141Innovation
- Abstract
- This report is the result of a thesis in mechanical engineering focused on product development. The project was performed at MarineDiesel, a company producing diesel engines for marine applications in Ängelholm, Sweden. A need of a sterndrive strong enough for large diesel engines is present on the market. This thesis involves hydraulic systems and mechanical geometry for trimming and steering of the sterndrive and was part of the initial development of a prototype drive. The intention has been to reach a prototype level of design for the hydraulic cylinders and choosing an appropriate trim pump unit. The project has however been postponed leaving critical decisions untaken. This made it more convenient to perform the thesis as a... (More)
- This report is the result of a thesis in mechanical engineering focused on product development. The project was performed at MarineDiesel, a company producing diesel engines for marine applications in Ängelholm, Sweden. A need of a sterndrive strong enough for large diesel engines is present on the market. This thesis involves hydraulic systems and mechanical geometry for trimming and steering of the sterndrive and was part of the initial development of a prototype drive. The intention has been to reach a prototype level of design for the hydraulic cylinders and choosing an appropriate trim pump unit. The project has however been postponed leaving critical decisions untaken. This made it more convenient to perform the thesis as a parametrical study shaped to ensure the work carried out could come to as much use as possible. A concurrent analysis was made to get a wide perspective of existing concepts and detail solutions in order to inspire ideas for concept generation. Eleven realistic concepts divided into two sections were found and evaluated by concept scoring according to Product design and development, Karl T. Ulrich and Steven D. Eppinger [1]. The main focus was on robustness redundancy and safety. Based on the concept scoring seven concepts were rejected and the rest examined further. A calculation chart was conducted to evaluate the forces in the system and to provide output parameters for future prototyping. The chart, together with a second scoring procedure, motivated the conclusion to use the combination of two concepts, traditional gimbal configuration with dual external steering and trimming cylinders. To widen the steering range an idea of using a universal joint attached to the steering cylinder waist was found, making the total width of the drive significantly narrower. The result of the thesis is a choice of concept and a calculation chart providing the conceivable parameters dimensioning the system when crucial decisions are made in future development. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/4437473
- author
- Larsson, Fredrik LU
- supervisor
-
- Per Kristav LU
- organization
- course
- MMK820 20141
- year
- 2014
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- Sterndrive, trim/tilt, steering cylinder, gimbal
- report number
- ISRN LUTMDN/TMKT 14/5490 SE
- language
- English
- id
- 4437473
- date added to LUP
- 2014-05-13 13:36:28
- date last changed
- 2014-05-16 10:44:18
@misc{4437473,
abstract = {{This report is the result of a thesis in mechanical engineering focused on product development. The project was performed at MarineDiesel, a company producing diesel engines for marine applications in Ängelholm, Sweden. A need of a sterndrive strong enough for large diesel engines is present on the market. This thesis involves hydraulic systems and mechanical geometry for trimming and steering of the sterndrive and was part of the initial development of a prototype drive. The intention has been to reach a prototype level of design for the hydraulic cylinders and choosing an appropriate trim pump unit. The project has however been postponed leaving critical decisions untaken. This made it more convenient to perform the thesis as a parametrical study shaped to ensure the work carried out could come to as much use as possible. A concurrent analysis was made to get a wide perspective of existing concepts and detail solutions in order to inspire ideas for concept generation. Eleven realistic concepts divided into two sections were found and evaluated by concept scoring according to Product design and development, Karl T. Ulrich and Steven D. Eppinger [1]. The main focus was on robustness redundancy and safety. Based on the concept scoring seven concepts were rejected and the rest examined further. A calculation chart was conducted to evaluate the forces in the system and to provide output parameters for future prototyping. The chart, together with a second scoring procedure, motivated the conclusion to use the combination of two concepts, traditional gimbal configuration with dual external steering and trimming cylinders. To widen the steering range an idea of using a universal joint attached to the steering cylinder waist was found, making the total width of the drive significantly narrower. The result of the thesis is a choice of concept and a calculation chart providing the conceivable parameters dimensioning the system when crucial decisions are made in future development.}},
author = {{Larsson, Fredrik}},
language = {{eng}},
note = {{Student Paper}},
title = {{Hydraulics for steering and trimming of a sterndrive}},
year = {{2014}},
}