Numerical Analysis of the Potential of a Water-cooled Exhaust Manifold on Diesel- and Gasoline Engines

Abstract

External or integrated water-cooled exhaust manifolds are mentioned to be favourable for the overall engine behaviour on diesel and gasoline engines. To validate this potential, an analytical study has been conducted. A diesel and a gasoline engine model were built-up in GT-SUITE to assess the influence of water-cooled exhaust manifolds at full load. These engine models have been combined with VeLoDyna tool from IAV for vehicle simulation considering heat fluxes between engine and vehicle cooling systemto show the potential of the different designs in a driving cycle, including the catalyst heating up phase.

Analysis of Variable Intake Runner Lengths and Intake Valve Open Timings on Engine Performances

“…In order to achieve targeted torque at certain operating conditions, the design of engine subsystems have to be optimised. Development of the subsystems such as intake or exhaust manifold can be improved by performing simulation work during the engine development process [1][2][3][4]. There is a significant effect of the intake system design on the engine performance.…”