dry sump
Enable an agent to recognise a dry-sump lubrication system, assess its oil supply and scavenging state, and identify appropriate operating or maintenance actions.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 15 findings · 25 questions
Oil storage and circuit boundary Defines the dry-sump arrangement through its reservoir and distinct circulation functions.
Reservoir and collection sump
Separates oil storage from temporary collection within the host.
Operating oil inventory
Record where the main operating supply is held and how the collection sump relates to it.
- Which volume holds the normal operating oil supply, and how is it separate from the collection sump? definition
- Which tank, sump and connecting components belong to this system rather than to the host model? boundary
Pressure and return topology
Traces delivery to lubricated regions and scavenged return to storage.
Traceable oil paths
Represent pressure supply, collection and scavenged return as connected paths with identified interfaces.
- What path does oil follow from the reservoir pickup through pressure delivery and back through each scavenge stage? definition
- Which drawing or inspected configuration establishes the actual routing, including filters, coolers and bypasses? provenance
Pressure delivery and pump drive Captures how the system creates and regulates oil supply to the host.
Pump power and capacity
Relates pump operation to its drive and fluid conditions.
Available pressure-stage output
Record pressure-stage drive, speed relationship and documented output conditions.
- What powers the pressure stage, and how does its speed or command relate to host operation? definition
- What delivery flow is established at the relevant pump speed, oil viscosity and discharge pressure? measurement
Supply regulation and verification
Connects regulating devices and measurement locations to lubrication requirements.
Usable supply pressure
Assess pressure at meaningful points rather than treating any pump-outlet reading as proof of adequate lubrication.
- Where is supply pressure measured, and what limits apply at the stated oil temperature and host speed? measurement
- How do relief, regulation and bypass devices affect delivery, and what approved action follows an out-of-limit reading? action
Scavenging and air management Addresses oil removal from collection regions and handling of the returning oil-air mixture.
Collection region coverage
Maps scavenge pickups and stages to places where oil accumulates.
Scavenge coverage and balance
Record pickup coverage and evidence that return capacity prevents unacceptable oil accumulation.
- Which sump compartments or other collection regions feed each scavenge stage? definition
- What observations or tests establish adequate scavenging across the intended speed and motion envelope? provenance
Deaeration and ventilation
Describes separation of returning air and oil and control of gas pressure.
Return air and crankcase pressure
Record reservoir air separation, vent routing and any intentional crankcase pressure control.
- How does the reservoir separate returning air from oil before oil reaches the pressure-stage pickup? definition
- What crankcase and reservoir pressure limits apply, and where are they measured? measurement
Operating envelope and condition Defines the conditions under which oil remains available and suitable for circulation.
Reservoir pickup under motion
Examines supply continuity as oil moves within the reservoir and collection regions.
Motion-qualified oil supply
Record validated attitudes, accelerations and durations together with the required reservoir oil quantity.
- For what attitudes, accelerations and durations has uninterrupted supply been demonstrated? measurement
- What minimum operating reservoir quantity and internal pickup arrangement support those conditions? measurement
Thermal and contamination condition
Links lubricant condition and circuit restrictions to delivery and scavenging.
Circulating oil fitness
Record approved lubricant requirements, temperature bounds and indicators of contamination or restriction.
- Which host or system documentation specifies lubricant compatibility and allowable supply or reservoir temperatures? provenance
- Which temperature, filter restriction or debris observations require oil service, inspection or an operating restriction? action
Service readiness and fault response Supports correct oil servicing, restoration of circulation and response to dry-sump faults.
Level checking and priming
Defines design-specific conditions for checking inventory and establishing circulation.
Verified fill and start readiness
Distinguish the prescribed oil-level check from an arbitrary tank reading and verify readiness after circuit disturbance.
- At what temperature, running state or time after shutdown must reservoir level be checked? measurement
- What priming and verification procedure applies after draining, hose replacement or pump work? action
Fault localisation and protection
Relates observed symptoms to the pressure, return, storage and drive subsystems.
Evidence-led lubrication fault response
Record discriminating evidence and host-approved responses without assuming a universal shutdown threshold or interlock.
- What evidence distinguishes low inventory, pickup air ingestion, drive failure, pressure-stage failure and inadequate scavenging? measurement
- Which alarms or interlocks are installed, and what operating or shutdown response does the applicable procedure require? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these check these first hold for the sense of dry sump this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these kinds and varieties hold for the sense of dry sump this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of dry sump this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these failure modes and hazards hold for the sense of dry sump this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of dry sump this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.OBJ
What it is Filled
A dry sump is an engine lubrication arrangement in which scavenge pumps remove oil collecting in the crankcase and return it to a separate reservoir that supplies the pressure lubrication circuit.
In scope
- Separate oil reservoir and its usable supply, return, venting and pickup arrangements
- Pressure-feed and scavenge circuits, including pumps, pickups, lines and regulating devices
- Oil collection, air separation and crankcase pressure management
- Lubrication performance across speed, temperature, attitude and acceleration conditions
- System-specific monitoring, priming, oil-level checking and servicing
Out of scope
- The complete engine or other lubricated machine and its primary function
- Oil chemistry and lubricant manufacture beyond compatibility requirements
- Wet-sump lubrication architectures except as a comparison boundary
- Complete vehicle cooling and electrical systems beyond lubrication interfaces
- Product-line specifications and individual-unit service histories as standalone kinds
Why it exists Filled
Enable an agent to recognise a dry-sump lubrication system, assess its oil supply and scavenging state, and identify appropriate operating or maintenance actions.
Distinguishing features Filled
- The normal operating oil supply is held in a reservoir separate from the collection sump; an external cooler alone does not make a wet-sump system a dry sump.
- A scavenge path actively returns collected oil to the reservoir, while a pressure-feed path supplies lubricated components; these functions may share a pump assembly.
- The collection sump is intended to avoid retaining the main operating oil inventory; 'dry' does not require it to contain no oil.
- Classification depends on the complete storage and circulation arrangement, rather than a shallow oil pan, pump-stage count or crankcase vacuum alone.
What robots and AI may and may not do Filled
Must not
- Run an engine whose dry sump system shows low oil or a failed scavenge pump.
- Work on hot oil lines or tanks without safe cooling and isolation.
- Dispose of used oil to drains or soil.
Only with a human decision
- Modifying the lubrication system or approving the engine for racing or flight.
May
- Check oil level and leaks on a dry sump engine following the maker's procedure.
- Report pump, tank or line faults to the owner or mechanic.
Moral aspects Filled
- Oil fires and engine failure in vehicles and aircraft endanger people.
- Used oil pollutes water.
Who is affected
- Drivers and pilots
- Mechanics
- Spectators
Owners Filled
Steward
The owner of the vehicle or engine; its mechanic answers for maintenance.
Links to other meta-models Filled
parent
- Q1847497 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.dry-sump
- Wikidata: Q779325 (https://www.wikidata.org/wiki/Q779325)
Direct properties required Filled
- Lubricated host and system boundary: Host machine, lubricated regions and included circuit components
- Reservoir arrangement: External tank or integrated separate reservoir; pickup, return and vent configuration
- Oil inventory: L, separating total fill, reservoir operating quantity and service refill under specified conditions
- Pressure and scavenge stage arrangement: Stage count, function, drive type and assigned pickup region
- Pump drive relationship: Mechanical drive ratio or electric drive supply and control relationship
- Oil supply pressure: kPa at a named location, oil temperature and host speed or operating state
- Circuit flow capacity: L/min per stage at stated speed, viscosity, pressure and aeration conditions
- Oil temperature: °C at reservoir, supply or return measurement points
- Crankcase pressure: kPa relative to ambient, at a named operating condition
- Validated motion envelope: Attitude in degrees, acceleration in m/s² and exposure duration in s
- Lubrication readiness: Unknown, unprimed, primed, verified ready, degraded or inhibited
Recognition required Filled
- A separate oil tank with lines to the engine and a shallow crankcase pan.
- Additional scavenge pump stages on the engine.
Capabilities and actions required Filled
- Classify an arrangement as dry sump by tracing its oil storage, pressure-feed and scavenge paths.
- Compare measured lubrication behaviour with the host-specific operating envelope.
- Identify whether pressure loss may originate in reservoir supply, pump drive, pressure regulation or inadequate scavenging.
- Determine the applicable oil-level check, refill and priming procedure from the installed design.
- Assess proposed tank, hose, pump or lubricant changes against documented circuit requirements.
- Flag conditions requiring restricted operation, shutdown or inspection under the applicable host procedure.
Hazards and failure modes required Filled
- Scavenge failure floods the crankcase and can cause engine damage.
- Leaking lines spray hot oil that can catch fire.
Standards and interfaces required Filled
- SAE J300, issued by SAE International, classifies the viscosity of engine lubricating oils used in dry sump systems where the engine specification adopts those grades.
Context of use required Filled
- Dry sump lubrication is used in engines that need reliable oil delivery despite strong acceleration, cornering or changes in orientation.
- It is encountered in competition vehicles, some aircraft engines and other applications where oil control and engine packaging are important.
- The separate reservoir also supports oil cooling and separation of entrained air before the oil returns to the pressure circuit.
Sources Filled
- Wikidata item Q779325: dry sump - identity and sense of the item
- Wikipedia: Dry sump - general description of the item
Open questions
- Does the registry intend 'dry sump' to denote the complete lubrication system, the collection sump component or both, and does an existing world model already own that concept?
- Which authoritative references should establish classification boundaries for integrated-reservoir and semi-dry-sump arrangements?
- Which host-specific sources establish oil quantities, pressure and temperature limits, pump capacities and validated motion envelopes?
- Which standards, issuing bodies or certification requirements apply to each intended application, rather than to dry-sump systems universally?
- Which designs require explicit modelling of shutdown drain-back, anti-drain devices, pre-lubrication or intentional crankcase vacuum control?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q779325/spec.json