Case Study: Power Hop Improvement by Rear Mount Redesign - Small Passenger Car

Abstract

<div class="section abstract"><div class="htmlview paragraph">This Paper has as objective to describe the powertrain mount system and its relation with the Power Hop phenomenon. It will be present the Powertrain mounts stiffness characteristics and how the mounts manage the loads inputs.</div><div class="htmlview paragraph">In this study, we will review a summary about powertrain mounts main characteristics to help the understanding how to establish the static and dynamic characteristics, with the engine torque applied over the system. It will be present how the Powertrain mounts shall manage the loads inputs.</div><div class="htmlview paragraph">As a Case Study, it was applied one small passenger vehicle as hardware. This vehicle presents the powertrain mounts system as pendulum three points configuration. In addition, this vehicle presents the Power Hop phenomenon mainly in Reverse take off flat road. The required load data was collected through load cells installed on the powertrain mount system. The Power Hop phenomenon is mainly impacted by the rear mount, so the load data is related to rear mount direction <i>X</i>.</div><div class="htmlview paragraph">The solution was developed around the rear mount design. Its current design (Load deflection curve) was compared to competitor design that does not present the Power Hop phenomenon. The vehicle under study has a constrain related to engine package that was considered for solution development.</div><div class="htmlview paragraph">The study conclusion allows to comprehend the loads sensitivity against the rear mount rubber stiffness variation. The current scenario and proposed scenario were both subjectively (According to customer point of view) evaluated by NV&H specialists.</div></div>