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EP-4741692-A1 - ENERGY-SAVING ENGINE OIL CONTROL VALVE CAPABLE OF ACHIEVING ENGINE OIL INTERNAL CIRCULATION AND ENGINE SYSTEM

EP4741692A1EP 4741692 A1EP4741692 A1EP 4741692A1EP-4741692-A1

Abstract

Disclosed is an energy-saving engine oil control valve with internal engine oil circulation including a housing(1), a valve body (2) and a piston (3), which are all hollow structures; the housing (1) is radially provided with a first working oil hole (12) and a second working oil hole (13); the valve body (2) is fixedly mounted in the housing (1), an annular check valve (5) is mounted in the valve body (2), the piston (3) is slidably mounted in the valve body (2), and the piston (3) includes a first state and a second state; it can solve the problems of high manufacturing cost and assembly difficulty, low durability and reliability of parts and components and abnormal knocking risk caused by structural defects of the existing control valve.

Inventors

  • XIE, Zongrang
  • LIN, HAN
  • ZHOU, Jingqiao
  • YAN, Zhen

Assignees

  • Chongqing Changan Automobile Co., Ltd.

Dates

Publication Date
20260513
Application Date
20240202

Claims (13)

  1. An energy-saving engine oil control valve with internal engine oil circulation, comprising a housing (1), a valve body (2) and a piston (3), all of which are hollow structures; both ends of the housing (1) are formed with a mounting port and a first oil inlet (11), respectively, and the housing (1) is radially provided with a first working oil hole (12) and a second working oil hole (13); the valve body (2) is fixedly mounted in the housing (1); the valve body (2) is provided with a mounting groove (21); an annular check valve (5) is mounted in the mounting groove (21), and a side wall of the valve body (2) is radially provided with a fifth communicating oil port (27), a seventh communicating oil port (29), a ninth communicating oil port (211), a fourteenth communicating oil port (216), a fourth communicating oil port (26) and a sixth communicating oil port (28), which penetrate the side wall of the valve body (2); an outer wall of the piston (3) is provided with a third annular oil groove (35), a second annular oil groove (34) and a fourth annular oil groove (37), and the piston (3) is provided with a fourth oil inlet (36) penetrating a side wall of the piston (3) at the third annular oil groove (35); the first oil inlet (11) is communicated with the fourth oil inlet (36); the piston (3) is slidably mounted in the valve body (2); the oil inlet (11) is communicated with the fourth oil inlet (36) via a hollow inner cavity of the piston (3); the piston (3) comprises a first state and a second state; when the piston (3) is in the first state, the third annular oil groove (35) is communicated with the sixth communicating oil port (28), and the second working oil hole (13) is sequentially communicated with the fourth communicating oil port (26), the second annular oil groove (34), the ninth communicating oil port (211), and the fifth communicating oil port (27); and when the piston (3) is in the second state, the third annular oil groove (35) is communicated with the fourth communicating oil port (26), and the first working oil hole (12) is sequentially communicated with the sixth communicating oil port (28), the fourth annular oil groove (37), the fourteenth communicating oil port (216), and the seventh communicating oil port (29).
  2. The energy-saving engine oil control valve with internal engine oil circulation according to claim 1, wherein an outer wall of the valve body (2) is provided with an eighth communicating oil port (210) between the fifth communicating oil port (27) and the ninth communicating oil port (211), and the outer wall of the valve body (2) is provided with a thirteenth communicating oil port 1 between the seventh communicating oil port (29) and the fourteenth communicating oil port (216).
  3. The energy-saving engine oil control valve with internal engine oil circulation according to claim 1, wherein the housing (1) is further radially provided with a first oil drain hole (14), the valve body (2) is further radially provided with a third communicating oil port (24), an outer wall of the valve body (2) is provided with a fifteenth communicating oil port (217), and the first oil drain hole (14) is communicated with the third communicating oil port (24) via the fifteenth communicating oil port (217).
  4. The energy-saving engine oil control valve with internal engine oil circulation according to claim 1, wherein the housing (1) is further radially provided with a second oil drain hole (15), the valve body (2) is further radially provided with a tenth communicating oil port (212) and a twelfth communicating oil port (214), and an outer wall of the valve body (2) is provided with an eleventh communicating oil port (213) between the tenth communicating oil port (212) and the twelfth communicating oil port (214); the second oil drain hole (15) is communicated with the eleventh communicating oil port (213); when the piston (3) is in the first state, the second annular oil groove (34) is communicated with the tenth communicating oil port (212); and when the piston (3) is in the second state, the fourth annular oil groove (37) is communicated with the twelfth communicating oil port (214).
  5. The energy-saving engine oil control valve with internal engine oil circulation according to claim 1, wherein an inner wall of the housing (1) is provided with a limit groove (16) at an end where the mounting port is located, a limit clamp (10) is mounted in the limit groove (16), and the housing (1) is provided with a limit flange (17) at the first oil inlet (11).
  6. The energy-saving engine oil control valve with internal engine oil circulation according to claim 5, wherein a filter screen assembly (4) is mounted between the flange (17) and the valve body (2).
  7. The energy-saving engine oil control valve with internal engine oil circulation according to claim 1, wherein the fifth communicating oil port (27) and the seventh communicating oil port (29) are both slot-shaped through holes.
  8. The energy-saving engine oil control valve with internal engine oil circulation according to claim 1, wherein the third annular oil groove (35) is located between the second annular oil groove (34) and the fourth annular oil groove (37).
  9. The energy-saving engine oil control valve with internal engine oil circulation according to claim 1, wherein the valve body (2) and the piston (3) are both hollow structures with one end opened and the other end closed, an inner wall of the closed end of the valve body (2) is provided with a return spring mounting base (25), the closed end of the piston (3) is provided with a return spring mounting seat (31), and a return spring (6) is mounted between the return spring mounting base (25) and the return spring mounting seat (31).
  10. The energy-saving engine oil control valve with internal engine oil circulation according to claim 1, wherein an end of an outer wall of the valve body (2) near the first oil inlet (11) is circumferentially provided with a first communicating oil port (23), the outer wall of the valve body (2) is radially provided with a second communicating oil port (22) communicated with the first communicating oil port (23), the outer wall of the piston (3) is further provided with a first annular oil groove (32) and a second oil inlet (33), the second oil inlet (33) communicates the first annular oil groove (32) with the hollow inner cavity of the piston (3), and a hollow inner cavity in the piston (3) that communicates the second oil inlet (33) with the fourth oil inlet (36) is the third oil inlet (310); and the first oil inlet (11), the first communicating oil port (23), the second communicating oil port (22), the first annular oil groove (32), the second oil inlet (33), the third oil inlet (310), the fourth oil inlet (36) and the third annular oil groove (35) are all in a constant communicated state when the piston (3) is in any state.
  11. The energy-saving engine oil control valve with internal engine oil circulation according to claim 1, wherein the first oil inlet (11) is communicated with the fourth oil inlet (36) and mounted with an oil inlet check valve.
  12. The energy-saving engine oil control valve with internal engine oil circulation according to claim 11, wherein an open end of the piston (3) is axially provided with a plug mounting hole (38), a plug (9) is press-fitted into the plug mounting hole (38) with an interference fit, the piston (3) is provided with a check valve disc mounting seat (39) between the fourth oil inlet (36) and the second oil inlet (33), the oil inlet check valve comprises a check valve disc (7) and a disc check valve spring (8), the check valve disc (7) is mounted on the check valve disc mounting seat (39), and the disc check valve spring (8) is mounted between the plug (9) and the check valve disc (7).
  13. An engine system, comprising the energy-saving engine oil control valve with internal engine oil circulation according to any one of claims 1 to 12.

Description

This application claims priority to Chinese Patent Application No. 202310823461.8, filed with the China National Intellectual Property Administration on July 6, 2023, and entitled "ENERGY-SAVING ENGINE OIL CONTROL VALVE WITH INTERNAL ENGINE OIL CIRCULATION AND ENGINE SYSTEM", the entire content of which is incorporated in this application by reference. TECHNICAL FIELD The present application relates to the field of engine oil control valve technology and, in particular, to an energy-saving engine oil control valve with internal engine oil circulation and an engine system. BACKGROUND Variable valve timing adjustment of vehicle engines refers to changing the phase relationship between a camshaft and a crankshaft so that the engine obtains the best valve timing under an operating condition, which greatly improves the fuel economy, power torque and emission characteristics of the engine. Variable valve timing adjustment mainly refers to outputting oil pressure from an engine oil pump to an engine oil control valve, and directly driving VVT (Variable Valve Timing, variable valve timing) for phase adjustment. This approach has drawbacks such as high engine oil pressure demand, significant engine oil leakage, which increases the workload of the engine oil pump and thus increases the overall consumption of the engine oil. Therefore, in the context of the extreme thermal efficiency requirements of hybrid engines, an energy-saving engine oil control valve needs to be provided. Currently, there are some energy-saving engine oil control valves that can use camshaft torque to achieve internal engine oil circulation to reduce the workload of the engine oil pump. However, their implementations generally use more than two check valves and provide the check valve in a piston to move synchronously with the piston. The structure is relatively complex, the manufacturing cost and assembly difficulty are high, and the durability and reliability of the parts are low. A Chinese invention patent (Publication Number: CN110318836A) discloses a radial circuit energy-saving engine oil control valve, which can realize an internal engine oil circulation function. However, it uses two check valves to realize the internal engine oil circulation function, which has high manufacturing cost and assembly difficulty. In addition, the check valve that realizes the internal engine oil circulation function is provided inside a piston. While realizing the internal engine oil circulation function, the check valve will perform high-frequency reciprocating motion with the piston. The durability and reliability of the parts are low with an abnormal knocking risk. SUMMARY The purpose of the present application is to provide an energy-saving engine oil control valve with internal engine oil circulation, which is used to solve the problems of high manufacturing cost and assembly difficulty, low durability and reliability of parts and the abnormal knocking risk caused by structural defects of existing control valves. In order to achieve the above technical purposes, technical solutions adopted in the present application are as follows. An energy-saving engine oil control valve with internal engine oil circulation, including a housing, a valve body and a piston, all of which are hollow structures; both ends of the housing are formed with a mounting port and a first oil inlet, respectively, and the housing is radially provided with a first working oil hole and a second working oil hole;the valve body is fixedly mounted in the housing; the valve body is provided with a mounting groove; an annular check valve is mounted in the mounting groove, and a side wall of the valve body is radially provided with a fifth communicating oil port, a seventh communicating oil port, a ninth communicating oil port, a fourteenth communicating oil port, a fourth communicating oil port and a sixth communicating oil port, which penetrate the side wall of the valve body;an outer wall of the piston is provided with a third annular oil groove, a second annular oil groove and a fourth annular oil groove, and the piston is provided with a fourth oil inlet penetrating a side wall of the piston at the third annular oil groove;the first oil inlet is communicated with the fourth oil inlet; the piston is slidably mounted in the valve body; the oil inlet is communicated with the fourth oil inlet via a hollow inner cavity of the piston;the piston includes a first state and a second state;when the piston is in the first state, the third annular oil groove is communicated with the sixth communicating oil port, and the second working oil hole is sequentially communicated with the fourth communicating oil port, the second annular oil groove, the ninth communicating oil port, and the fifth communicating oil port; andwhen the piston is in the second state, the third annular oil groove is communicated with the fourth communicating oil port, and the first working oil hole is sequentially communicated