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Sturman Industries has been
a technical leader in the fuel injection industry for over
a decade
of intensified fuel systems development. We utilize the packaging, energy, speed, and repeatability
benefits of our digital valve technology to bring new levels
of control to fuel injection. Sturman is engaged in design,
prototyping, testing and pre-production activities on a
number of projects with companies in world-wide major automotive
markets. We also work closely with many U.S. government offices
with established programs and procedures. Fuel systems
range in application from passenger vehicles to heavy duty
trucks. Improved flexibility and control have been achieved allowing the use of
any fuel on-demand regardless of its level of refinement.
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| STURMAN INJECTOR PHILOSOPHY
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- Local intensification
- Digital
valve controlled high pressure, generated within
the injector
- Infinite control of pressure timing (including
cylinder deactivation)
- Low pressure hydraulic rail (not subject to nozzle
or injector failure)
- Low pressure fuel except locally
in the injector
- Infinite control of injection timing
(including cylinder
deactivation)
- Intensification independent of injection
control (digital valve control)
- Multiple event control (5+)
- Close-coupled event control
- No high pressure lines or fittings
- Emissions control enabling development
- Higher injection pressures
- Multiple pressure level control (rail independent)
e.g. rate shaping, low pressure pilot,
high pressure main
- Low pressure
at the nozzle when not injecting
- Multiple event capability enabling
new cycles (HCCI, HCTI,
etc.)
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S1 Injector
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| S1- INTENSIFIED DIESEL
INJECTION TECHNOLOGY |
The Implementation of Sturman’s
Knowledge Gained from Many Years of Developing Intensified
Common
Rail Fuel Systems
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| Objective – Combine the advantages of: |
| 1. Mechanical Unit Injectors |
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a. High Pressure Capability (2400 Bar) |
| 2. High-Pressure Common Rail Injectors |
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a. Variable Injection Timing, Pressure & Duration
b. Performance (Multiple Events, Small Quantity Control,
Low Dwell) |
| 3. Low-Pressure (Intensified) CR Injectors |
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a. High Pressure Capability (2400 Bar)
b. Variable Injection Timing, Pressure & Duration
c. Performance (Multiple Events, Small Quantity Control,
Low Dwell)
d. Safety |
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SUPERIOR FLEXIBILITY
Click
to enlarge |
SAFETY
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Local intensification |
- No high pressure external to the injector
- Low pressure fuel pump
- Low pressure fuel fittings
- Designed against the possibility of over-fuelling in
the event of nozzle tip failure
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SUPERIOR CONTROLLABILITY
Click to enlarge |
SMALL PACKAGE
Currently in use from 1.9-6.0L
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| PERFORMANCE |
- S1 Injection Control
- 5+ Events
- Minimum Qty < 1.0 mm3 @ 700 Bar
- Minimum Qty < 1.5 mm3 @ 2400 Bar
- Dwell < 200 msec
- Close-Coupled Pilot
- High Pressure Close-Coupled Post
- Pressure Intensification Within Injector
- 4 Pressure Levels
- Active Rate Shaping
- NO Intensification Required for Idle & Light
Loads (Increased Efficiency, Reduced NVH)
- High Pressure Capable (2400 Bar)
- ALL Control Valves Operate at Rail Pressure (850
Bar Max)
- Nozzle ONLY has to Seal Against Rail Pressure
(850 Bar Max)
- Single Fluid - FUEL
- Improved Cold Start Performance
- Eliminates Oil/Fuel Mixing
- Supply Pressure- 300-850 Bar
- Connected Directly to Nozzle Sac Volume
- Packaging
- Less Accumulator (Rail) Volume Needed
- Less Intensification Needed - Smaller Diameter
Intensifier(s)
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Contact Us for
more information or on specifics for your application. |
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