Diploma in Hydraulic Energy Storage
Online postgraduate diploma of 800 hours in Hydraulic Energy Storage: 8 modules covering fluid power principles, hydropneumatic accumulators, energy recovery circuits, system modelling and simulation, energy management strategies, pressure equipment safety and maintenance, with an assigned technical tutor.
Diploma in Hydraulic Energy Storage — studying from the United States
Off-road and specialty vehicle engineering is a strong part of American manufacturing, with heavy equipment and agricultural machinery produced across Illinois, Wisconsin, Iowa, Texas and North Carolina. Companies such as Caterpillar, Deere & Company and Oshkosh Corporation design construction, agricultural, mining and specialty vehicles. Engineers focus on hydraulics, powertrains, operator ergonomics and durability under demanding conditions. Compliance with emissions and safety standards shapes much of the design process.
Fees for the United States: US$1,220 (US Dollars), with instalments and employer sponsorship available.
Relevant bodies in the United States
Typical roles
Questions from the United States
What US bodies are relevant to off-road and special vehicle engineering?
SAE International is central, publishing off-road and heavy machinery standards. Machinery safety is addressed by OSHA, and emissions by the EPA. Professional PE licensure is granted by state boards. SEIUM's qualifications are private and not accredited, so recognition for particular roles is decided by employers or the relevant body.
Where do off-road and special vehicle engineers work in the United States?
Employers include agricultural, construction, and mining equipment manufacturers, defense and specialty vehicle builders, and off-road accessory companies. Roles include design, testing, and drivetrain engineering. Employers evaluate applied skill and experience, so use your final project to show practical competence to hiring managers.
How flexible is the programme for working professionals in the US?
The programmes are 100% online and taught in English, so you can study from home without a student visa. Workloads are 300, 800, or 1,900 hours depending on the programme type, so plan your time accordingly. Fees are payable in instalments, and employer sponsorship may be possible, so ask your employer early.
Take the controls.
Run a real engineering trade-off from this field. Move the sliders, watch the model react in real time and beat the challenge.
What you will be able to do
Understand the physics of energy storage in hydropneumatic accumulators.
Size accumulators according to the machine duty cycle.
Design energy recovery circuits for boom and swing.
Model and simulate hydraulic systems with storage.
Define energy management strategies and calibrate them.
Apply pressure equipment and machinery safety regulations.
Plan the maintenance and inspection of accumulators.
Who it's for
- Hydraulic systems engineers.
- Machinery energy efficiency engineers.
- Fluid power simulation specialists.
- Hydraulic maintenance technicians.
- Mobile machinery validation engineers.
- Pressure equipment safety managers.
- Engineering or science graduates looking to enter construction machinery.
What you'll work with
- ISO 4413:2010 (hydraulic fluid power: safety requirements)
- Directive 2014/68/EU (pressure equipment)
- EN 14359 (gas-loaded accumulators for fluid power)
- ISO 4406 (fluid cleanliness code)
- ISO 1219-1 (graphical symbols and circuit diagrams)
- ISO 13849-1 (safety-related parts of control systems)
- Directive 2006/42/EC (machinery)
- Simcenter Amesim
- MATLAB/Simulink with Simscape Fluids
- Automation Studio
- HYDAC ASP
8 modules
1.1Pressure, flow and hydraulic power1.2Oil compressibility and bulk modulus1.3Pressure losses in lines and valves1.4ISO 1219 symbols in circuit diagrams1.5Variable-displacement axial piston pumps1.6Hydraulic motors and energy conversion1.7Fluid viscosity and viscosity index1.8Volumetric and hydromechanical efficiency1.9Duty cycles of mobile machinery1.10Workshop: reading the hydraulic diagram of an excavator
2.1Bladder accumulators: construction and use2.2Diaphragm and piston accumulators2.3Isothermal and adiabatic behaviour of nitrogen2.4Pre-charge pressure and pressure ratio2.5Calculating the usable stored volume2.6Real gas and compressibility factor2.7Charging and discharging times2.8Safety blocks and discharge valves2.9Selection from manufacturer catalogues2.10Practical exercise: sizing a bladder accumulator
3.1Recovery during boom lowering3.2Recovery during superstructure swing3.3Hydraulic transformers and common pressure rail3.4Series and parallel architectures3.5Load-holding and counterbalance valves3.6Four-quadrant pump-motor units3.7Integration with variable-displacement pumps3.8Managing the high-pressure rail3.9Comparison with electrical storage3.10Case study: energy recovery in a forestry crane
4.1Lumped-parameter models4.2Modelling accumulators in Simscape Fluids4.3Simcenter Amesim hydraulic libraries4.4Load profiles and test cycles4.5Gas thermal losses and time constant4.6Sensitivity to pre-charge4.7Validation with test-bench data4.8Optimising volume and working pressure4.9Co-simulation with multibody models4.10Lab: simulating a backhoe loader cycle
5.1Accumulator state of charge5.2Heuristic energy management rules5.3Dynamic programming and optimal control5.4Model predictive control5.5Electrohydraulic proportional valves5.6Gas pressure and temperature sensors5.7Controller communication over SAE J19395.8Calibrating activation thresholds5.9Real-time fault diagnosis5.10Practical exercise: management law in a mobile controller
6.1Pressure Equipment Directive 2014/68/EU6.2Risk categories and conformity assessment modules6.3ISO 4413 safety requirements6.4Automatic discharge of stored energy6.5Statutory periodic inspections6.6High-pressure fluid injection risk6.7Lockout/tagout of hydraulic energy6.8Safety functions to ISO 13849-16.9CE marking and technical documentation6.10Case study: risk assessment of an installation
7.1Checking the nitrogen pre-charge7.2Charging and testing equipment7.3Bladder failures and gas permeation7.4Fluid cleanliness to ISO 44067.5Filtration and contamination control7.6Oil analysis and trending7.7Fatigue of shells and connections7.8Preventive maintenance plans7.9MTBF and availability indicators7.10Workshop: recharging and checking an accumulator
8.1Defining the case and the duty cycle8.2Energy requirements and space constraints8.3Selecting the architecture8.4Sizing accumulators and valves8.5Complete simulation model8.6Proposed control strategy8.7Estimating fuel savings8.8Risk analysis and conformity8.9Report and presentation8.10Final project: final review with the tutor
How you'll learn
Training is 100% online on SEIUM's campus, with downloadable material, recorded classes and an assigned technical tutor. There are no fixed timetables: you progress at your own pace within each intake, so the programme fits around your job.
Each module combines theory, guided reading of the original standard and applied exercises. The working software is Simcenter Amesim, MATLAB/Simulink with Simscape Fluids, Automation Studio and HYDAC ASP, in free, academic or evaluation versions. Exercises are based on real procedures for sizing accumulators on a hydraulic test bench, measuring energy savings in digging cycles and checking pre-charge in the workshop. Assessment is continuous by module, plus the final capstone project.
Standards covered: ISO 4413:2010, Pressure Equipment Directive 2014/68/EU, EN 14359, ISO 4406, ISO 1219-1, ISO 13849-1, Machinery Directive 2006/42/EC.
Build it end to end
Your final project follows the real engineering workflow, step by step, reviewed by your tutor.
Where this takes you
Requirements
- Prior technical training or professional experience in the sector. No university degree is required.
- Internet connection and a computer able to run the programme software.
- English sufficient to read technical standards.
Ready to start?
Send your application today. Our admissions team replies within 72 hours with your study plan and funding options.
Frequently asked questions
The programme totals 800 hours over 6–8 months. You set your own pace within each intake, and your tutor helps you plan the workload around your job.
You work with Simcenter Amesim, MATLAB/Simulink with Simscape Fluids, Automation Studio and HYDAC ASP, using free, academic or evaluation versions. Your tutor indicates the free alternative wherever one exists.
A SEIUM Institute diploma, awarded on passing the continuous assessment and the final project. It is SEIUM's own qualification, not an official state degree; its recognition depends on the programme completed and the regulations of each country.
Yes. Modules passed are recognised in a higher programme in the same area (postgraduate diploma or master's). Ask about the recognition policy when you enrol.
Prior technical training or professional experience in the sector (no university degree required), a computer able to run the programme software and English sufficient to read technical standards.
Start dates are set by SEIUM's faculty for each intake. Our admissions team will confirm the next available date when you apply.
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