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US 8,616,857 B2Granted
Oil pump unit with variable flow rate
AssigneesYamada Manufacturing Co., Ltd., Honda Motor Co., Ltd.
InventorsKeiichi Kai, Junichi Miyajima, Noriyuki Kawamata, Toshimasa Mitsubori, Satoshi Ino
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Abstract
An oil pump unit with a variable flow rate includes lubrication pumps and a control pump that are driven by rotation of a crankshaft of an engine, and changes an oil supply amount from the control pump to each part of the engine, in which the control pump includes a plurality of oil pumps that have different discharge rates.
Claims7
An oil pump unit with a variable flow rate comprising
- a lubrication pump;
- and
- a control pump that includes a main pump and a sub-pump that have different discharge rates, wherein the lubrication pump and the control pump are disposed so as to share a rotational axis and are driven by rotation of a crankshaft of an engine,
- wherein an oil supply amount from the control pump to each part of the engine is variable, and
- wherein the sub-pump is disposed so as to be between the main pump and the lubrication pump along the rotational axis.
2 more elements
An oil pump unit with a variable flow rate comprising:
- lubrication pumps;
- and
- a control pump, wherein the lubrication pumps and the control pump are disposed so as to share a rotational axis and are driven by rotation of a crankshaft of an engine, and wherein the control pump includes an oil path switching valve that switches a discharge port of the control pump to communicate or not with an oil supply channel leading to each part of the engine such that the oil supply amount from the control pump to each part of the engine is variable, wherein
- the control pump includes a plurality of oil pumps that have different discharge rates,
- at least one of the plurality of oil pumps is a main pump that is kept communicating with the oil supply channel while the other of the plurality of oil pumps is a sub-pump that is switched to communicate or not with the oil supply channel by an operation of the oil path switching valve, and a discharge rate of the sub-pump is set larger than a discharge rate of the main pump, and
- the sub-pump is disposed so as to be between the main pump and the lubrication pumps along the rotational axis.
3 more elements
Dependencies are inferred from the claim text.