Rotary engine cooling system
AssigneeDeere & Company
InventorCharles Jones
Life of this patent
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Abstract
A rotary internal combustion engine has a rotor housing with drilled coolant passages extending generally axially therethrough, a thin wear-resistant liner lines the inner trochoid surface of the rotor housing. A ceramic insert may be used to insulate a top-dead-center region of the inner portion of the rotor housing. Some of the coolant passages may cross each other through a "V-crotch" portion of the housing between the spark plug and pilot injector bores.
Claims17
A rotary internal combustion engine comprising:
- a rotor housing forming a trochoidal cavity therein, the housing having a recess formed in a top-dead-center region of the engine and having a housing bore extending therethrough;
- an insert of refractory material received in the recess, the insert having an insert bore extending therethrogh and communicating the housing bore with the cavity;
- an element of a fuel injection and ignition system extending through the housing and insert bores, the element having an end exposed to the cavity;
- and
- the housing having a plurality of cooling passages extending therethrough, the cooling passages being comprised of drilled holes.
A rotary internal combustion engine comprising:
- a rotor housing forming a trochoidal cavity therein, the housing having a recess formed in a top-dead-center region of the engine, the housing having a sleeve member projecting into the recess and towards the cavity and having a bore extending through the housing and the sleeve and opening into the cavity;
- an insert of refractory material received in the recess, the insert having a passage extending therethrough for receiving the sleeve;
- and
- an element of a fuel injection and ignition system extending throught the bore, the element having an end exposed to the cavity;
- and
- the housing having a plurality of cooling passages extending therethrough, the cooling passages being comprised of drilled holes.
In a rotary combustion engine with a housing having a trochoidal cavity therein, the housing having a plurality of cooling passages therein for receiving cooling fluid, the improvement wherein:
- the coolant passages comprise a plurality of drilled holes extending through the housing;
- a thin wear resistant liner lines the surface of the trochoidal cavity;
- the housing has a recess formed in a top-dead-center region thereof, the recess opening towards the trochoidal cavity;
- and
- an insert of refractory material is received in the recess, the liner extending over said recess and covering a radial inner surface of the insert.
A rotary combustion engine with a housing defining a cavity therein, a rotor mounted for movement within the cavity, the housing having a bore extending through a radially outer peripheral portion thereof for receiving an element of a fuel injection and ignition system, and the housing having a plurality of cooling passages therein for receiving cooling fluid, the improvement wherein:
- at least one group of the cooling passages comprises a plurality of spaced-apart drilled passages extending through a radially outer peripheral portion of the housing in a direction generally parallel to a rotation axis of the rotor, and the cooling passage of said group forming an array which extends generally parallel to an axis of the bore.
In a rotary combustion engine with a housing having cavity therein, the housing having a bore extending therethrough for receiving an element of a fuel injection and ignition system, the housing having a plurality of cooling passages therein for receiving cooling fluid, the improvement wherein:
- at least one group of the cooling passages forms an array which extends generally parallel to an axis of the bore;
- the housing has a recess formed in a top-dead-center region thereof, the recess opening towards the cavity;
- an insert of refractory material is received in the recess;
- and
- a liner extends over said recess and covering a radial inner surface of the insert.
Dependencies are inferred from the claim text.