Christopher Martinek Email & Phone Number

Wauwatosa, Wisconsin, United States

- Created dynamic geartrain models of planetary transmissions in GT-Suite to determine bearing reaction loads and shaft slopes.- Quantified engine bore distortion by combining results from GT-Power, Fluent, Ansys, and Altair SimLab.- Imported distorted bore geometry into GT-Suite to simulate piston ring dynamics.- Applied topology optimization to cylinder head cooling fin design to achieve targeted temperature reduction.- Utilized GT-Suite to determine proper engine mount / isolator location on home standby generators.- Developed a workflow for EFI MIL / SIL / HIL simulation with GT-Suite and Simulink.

Wauwatosa, Wi

- Supported changing the engineering culture by mentoring project engineers to develop them into technical design engineers.- Democratized engineering simulation practice by creating standards and guidelines.- Documented the engine simulation process and ranked simulations on a 10 point DFMEA scale so they can be applied as preventive design controls.- Developed rotor dynamics models in Ansys to establish inertia limit curves for applications that directly couple to crankshafts.- Collaborated with the NVH team on exhaust system development for the 26kW home standby generator.- Designed mufflers for all single cylinder horizontal engines using GT-Power to meet noise and power requirements.- Created a vibration fatigue methodology using FRF and PSD analyses to improve component durability.- Identified the root cause of a valvetrain noise concern by simulating valve spring surge in GT-Suite.

Wauwatosa, Wi

- Finite Element Analysis (FEA) in implicit and explicit codes (Ansys, LS-Dyna, Altair Optistruct).- Structural analysis of aluminum castings, crankshafts, steel stampings, and injection molded parts.- System level engine performance, valvetrain, lubrication, and cranktrain simulation and optimization using GT-Suite.- Developed a crankshaft topology optimization process.- Established techniques for cumulative damage fatigue analysis on aluminum castings and crankshafts.

- Flexible integration team member responsible for design, quality, cost, and timing of systems from concept to production.- Key contributor to the launch of the model year 2014 Touring powertrain.

- Engine project design lead responsible for ensuring the following systems and components met project features and specifications: fuel delivery, valvetrain, cylinder heads, camshafts, cam drive, piston assembly, and cooling system.- Developed system level concepts and collaborated with the Powertrain Center of Expertise groups to detail, analyze, and finalize component designs.

- Powertrain lead for model year 2009 Touring rear wheel compensator.- Utilized finite element analysis, as well as hand calculations, to ensure that components met or exceeded established performance, durability, and reliability requirements.- Received a patent for the novel solution of using isolator lugs with unequal axial depths to induce a moment on each isolator element to counteract thrust load from sprocket and wheel lug draft (see Patent No.: US 7,931,538 B2).

- Supported secondary drive development (drive belts, sprockets, and compensators)- Established secondary drive design requirements by analyzing vehicle torque data and developing laboratory test methodologies.- Assisted with vehicle data acquisition for the evaluation of shift quality on sequential shift transmissions.

Master Of Science (Ms), Mechanical Engineering

Emphasis on engineering mechanics and dynamic systems analysis

Bachelor Of Science (Bs), Mechanical Engineering