Download Vehicular Engine Design by Kevin Hoag, Brian Dondlinger (auth.) PDF
By Kevin Hoag, Brian Dondlinger (auth.)
This booklet offers an creation to the layout and mechanical improvement of reciprocating piston engines for vehicular purposes. starting from the choice of required displacement and function, insurance strikes into engine configuration and structure. severe structure dimensions and layout trade-offs are then provided for pistons, crankshafts, engine blocks, camshafts, valves, and manifolds. assurance keeps with fabric power and casting approach choice for the cylinder block and cylinder heads. each one significant engine part and sub-system is then taken up in flip, from lubrication approach, to cooling process, to consumption and exhaust structures, to NVH. For this moment version most up-to-date findings and layout practices are incorporated, with the addition of over sixty new images and plenty of new equations.
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Extra info for Vehicular Engine Design
6 cover steady-state operation. Also important in automobile applications is transient performance—specifically acceleration rate. 7. Also shown in the figure are the shift points for maximum acceleration. 6 provides more rapid acceleration, and is thus favored in many high performance applications. The higher ratio (numerically lower) results in higher maximum vehicle speed, and of more importance in most applications, it results in lower engine speeds at any given vehicle speed. Because of the strong impact of friction on fuel economy the lower engine speeds provide better fuel economy while the engine will feel less responsive (lower acceleration rates) in the vehicle.
1 Developing a Reliable and Durable Engine An integral part of the engine design process is that of ensuring that the product has sufficient reliability and durability. As used in this book durability refers to the useful life of the engine. For the engine system this is the average life-to-overhaul. For most of the major engine components it includes an expectation of reuse when the engine is overhauled. Reliability includes also infant mortality and the unforeseen problems that require attention over the engine’s operational life.
For example, analysis may reveal that the B50 life of a given engine is 125,000 miles, and that the most common reason for overhaul is head gasket leakage. Further development of the head gasket results in increasing the B50 life to 140,000 miles. At this point the most common reason for overhaul is found to be low oil pressure due to main bearing wear, and development efforts shift to this component. Various concepts pertaining to engine development for durability and reliability have been introduced.