Wankel rotary engine

E395833

internal combustion engine rotary engine

The Wankel rotary engine is an internal combustion engine that uses a rotating triangular rotor instead of reciprocating pistons, known for its compact size, smooth operation, and use in select Mazda sports cars.

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All labels observed (2)

Label	Occurrences
Wankel rotary	1
Wankel rotary engine canonical	1

Statements (65)

Predicate	Object
instanceOf	internal combustion engine ⓘ rotary engine ⓘ
application	aircraft ⓘ automobiles ⓘ go-karts ⓘ motorcycles ⓘ range extenders for electric vehicles ⓘ
combustionChambersPerRotor	three ⓘ
commercializedBy	Mazda Motor Corporation ⓘ surface form: Mazda NSU Motorenwerke ⓘ
coolingMethod	air-cooled ⓘ water-cooled ⓘ
cyclePerEccentricShaftRevolution	one power stroke per eccentric shaft revolution ⓘ
cyclePerRotorRevolution	three power strokes per rotor revolution ⓘ
developedInCountry	Germany ⓘ
firstCommercialUse	NSU Spider ⓘ
firstCommercialUseYear	1964 ⓘ
fuelType	gasoline ⓘ hydrogen ⓘ natural gas ⓘ
hasAdvantage	compact size ⓘ few moving parts ⓘ high RPM capability ⓘ high power-to-weight ratio ⓘ smooth operation ⓘ
hasCombustionProcess	spark-ignition ⓘ
hasConfiguration	four-rotor ⓘ single-rotor ⓘ three-rotor ⓘ twin-rotor ⓘ
hasDisadvantage	apex seal wear ⓘ challenges meeting emissions regulations ⓘ higher hydrocarbon emissions ⓘ oil consumption ⓘ relatively poor fuel economy ⓘ
hasHousingShape	epitrochoid ⓘ
hasLubricationMethod	oil metering into intake or combustion chamber ⓘ
hasRotorShape	Reuleaux triangle-like ⓘ
hasWorkingPrinciple	four-stroke thermodynamic cycle ⓘ rotary motion instead of reciprocating motion ⓘ
inventor	Felix Wankel ⓘ
namedAfter	Felix Wankel ⓘ
notableModel	Citroën GS Birotor ⓘ Citroën M35 ⓘ Mazda Cosmo Sport ⓘ Mazda Cosmo Sport ⓘ surface form: Mazda R100 Mazda RX-2 ⓘ Mazda RX-3 ⓘ Mazda RX-7 ⓘ Mazda RX-8 ⓘ Norton Classic motorcycle ⓘ Norton Classic motorcycle ⓘ surface form: Norton F1 motorcycle
notableUser	Mazda Motor Corporation ⓘ surface form: Mazda NSU Motorenwerke ⓘ
peakPopularityPeriod	1960s ⓘ 1970s ⓘ
usedAs	auxiliary power unit ⓘ light aircraft powerplant ⓘ range extender in plug-in hybrid vehicles ⓘ
usesComponent	apex seals ⓘ eccentric shaft ⓘ epitrochoid-shaped housing ⓘ oil control rings ⓘ side seals ⓘ triangular rotor ⓘ

How these facts were elicited

The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.

Instruction

You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10.

# Requirements
- If you don't know the subject at all, return an empty list.
- If the subject is not a named entity, return an empty list.
- Include at least one triple where predicate is "instanceOf".
- Do not get too wordy.
- Separate several objects into multiple triples with one object.

Input

Subject: Wankel rotary engine
Description of subject: The Wankel rotary engine is an internal combustion engine that uses a rotating triangular rotor instead of reciprocating pistons, known for its compact size, smooth operation, and use in select Mazda sports cars.

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Mazda Motor Corporation → hasTechnology → Wankel rotary engine ⓘ

Mazda RX-7 → engineConfiguration → Wankel rotary engine ⓘ

this entity surface form: Wankel rotary