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US 9,869,313 B2Granted
Oil pump, engine cover and engine comprising the same
AssigneesShenzhen BYD Auto R&D Company Limited, BYD Company Limited
InventorsJing Liu, Junli Zheng, Haibin Li, Jinchen Lin
Life of this patent
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Abstract
An oil pump is provided. The oil pump comprises: a shell; a rotor mounting part on the shell and having a rotor supporting structure; and a rotor mechanism disposed on the rotor mounting part. The shell has an inlet and an outlet and defines a low-pressure oil chamber and a high-pressure oil chamber. A partition wall is disposed between the low-pressure oil chamber and the high-pressure oil chamber for separating the low-pressure oil chamber and the high-pressure oil chamber. An engine cover comprising the oil pump and an engine comprising the engine cover are also provided.
Claims15
An oil pump, comprising:
- a shell having an inlet and an outlet and defining a low-pressure oil chamber and a high-pressure oil chamber therein, the low-pressure oil chamber having a low-pressure oil passage connected to the inlet, and the high-pressure oil chamber having a high-pressure oil passage connected to the outlet, a partition wall being disposed between the low-pressure oil chamber and the high-pressure oil chamber for separating the low-pressure oil chamber and the high-pressure oil chamber;
- a rotor mounting part on the shell and having a rotor supporting structure;
- and
- a rotor mechanism disposed on the rotor mounting part,
- wherein a buffer chamber is disposed between the partition wall and the low-pressure oil chamber, and a flow limiting wall is disposed in the buffer chamber,
- wherein the flow limiting wall divides the buffer chamber into an inflowing buffer chamber and an outflowing buffer chamber connected to the inflowing buffer chamber via a pressure relief mechanism;
- and
- wherein the partition wall comprises a main body portion adjacent to the outlet and an extending portion extending from the main body portion to the rotor mounting part, and a side of the extending portion of the partition wall located within the high-pressure oil chamber is tilted away from a corresponding portion of the shell defining an opposite side of the high-pressure oil chamber, defining a funnel-shaped portion of the high-pressure oil passage that gradually narrows towards the outlet so as to guide oil flow into the high-pressure oil chamber.
5 more elements
An oil pump, comprising:
- a shell having an inlet and an outlet and defining a low-pressure oil chamber and a high-pressure oil chamber therein, the low-pressure oil chamber having a low-pressure oil passage connected to the inlet, and the high-pressure oil chamber having a high-pressure oil passage connected to the outlet, a partition wall being disposed between the low-pressure oil chamber and the high-pressure oil chamber for separating the low-pressure oil chamber and the high-pressure oil chamber;
- a rotor mounting part on the shell and having a rotor supporting structure;
- and
- a rotor mechanism disposed on the rotor mounting part,
- wherein the partition wall comprises a main body portion adjacent to the outlet and an extending portion extending from the main body portion to the rotor mounting part, and a side of the extending portion of the partition wall located within the high-pressure oil chamber is tilted away from a corresponding portion of the shell defining an opposite side of the high-pressure oil chamber, defining a funnel-shaped portion of the high-pressure oil passage that gradually narrows towards the outlet so as to guide oil flow into the high-pressure oil chamber, and
- wherein the rotor mounting part is disposed at an end of the shell, and the high-pressure oil chamber and the low-pressure oil chamber are, side by side, located at the same side of a periphery of the rotor mounting part.
3 more elements
An engine cover, comprising:
- an engine cover body, and
- an oil pump disposed on the engine cover body, the oil pump further including:
- a shell having an inlet and an outlet and defining a low-pressure oil chamber and a high-pressure oil chamber therein, the low-pressure oil chamber having a low-pressure oil passage connected to the inlet, and the high-pressure oil chamber having a high-pressure oil passage connected to the outlet, a partition wall being disposed between the low-pressure oil chamber and the high-pressure oil chamber for separating the low-pressure oil chamber and the high-pressure oil chamber;
- a rotor mounting part on the shell and having a rotor supporting structure;
- and
- a rotor mechanism disposed on the rotor mounting part,
- wherein the shell of the oil pump is integral with the engine cover body,
- wherein the partition wall comprises a main body portion adjacent to the outlet and an extending portion extending from the main body portion to the rotor mounting part, and a side of the extending portion of the partition wall located within the high-pressure oil chamber is tilted away from a corresponding portion of the shell defining an opposite side of the high-pressure oil chamber, defining a funnel-shaped portion of the high-pressure oil passage that gradually narrows towards the outlet so as to guide oil flow into the high-pressure oil chamber, and
- wherein the rotor mounting part is disposed at an end of the shell, and the high-pressure oil chamber and the low-pressure oil chamber are located, side by side, at the same side of the rotor mounting part.
6 more elements
Dependencies are inferred from the claim text.