Jacobs Vehicle Systems College of Engineering（雅各布斯车辆系统,工程学院）.pdf

Jacobs Vehicle Systems  Analysis Engineer-JAC000162 Danaher Company Description JVS is the maker of world famous Jake Brake® engine retarders and is recognized as the industry leader in developing and manufacturing commercial vehicle retarding systems. As a driving force in our industry, we are committed to utilizing our proven technology, expertise and leadership to revolutionize the retarding business. We continue to accomplish this by anticipating engine manufacturer and end-user needs, and exceeding their expectations. Our products are designed and developed using advanced computer-aided analysis, and then proven both in the lab and the field. This position is an excellent developmental position for candidates aspiring to take on even more significant job responsibilities within Jacobs Vehicle Systems (JVS) or Danaher. Description Essential Duties and Responsibilities Performance Analysis  Create GT-Power engine performance models incorporating hydraulic valve actuation model of engine braking and Variable Valve Actuation (VVA) systems including effects of compliance and valve float. Calibrate and validate GT-Power model vs. test data.  Optimize system design for engine performance while meeting loading and cam kinematic constraints over the range of system operation and design tolerances. Hydraulic/Valve-Train Dynamic Analysis  Perform hydraulic, valve-train dynamic, and cam kinematics analysis to support the development of engine braking and VVA systems.  Perform simulations of hydraulic valve actuation systems in MATLAB/Simulink using a proprietary Simulink block library. Parameterize component stiffness, hydraulic component flow resistance, and high-speed solenoid valve characteristics based on textbook results, FEA, CFD, and test. Calibrate and validate simulations vs. test data.  Design cam profile; define lash setting, set requireme