Lubricating apparatus of vehicle

• US 10,253,868 B2
• Filed: 08/07/2017
• Issued: 04/09/2019
• Est. Priority Date: 08/12/2016
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kiyokami, Hiroaki, Nishikawa, Yukinobu, Hori, Tetsuo, Okuno, Hakuba
• Primary Examiner(s): Amick, Jacob M
• Application Number:
  US15/670,243
• Publication Number:
  US 20180045295A1
• Time in Patent Office: 610 Days
• CPC Class Codes: B60K 6/20 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: F16H 57/0424 Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes means for guiding lubricant into an axial channel of a shaft F16H57/0426
• CPC Class Codes: F16H 57/0427 on rotary parts, e.g. using baffles for collecting lubricant by centrifugal force
• CPC Class Codes: F16H 57/0439 using multiple pumps with different power sources or a single pump with different power sources, e.g. one and the same pump may selectively be driven by either the engine or an electric motor
• CPC Class Codes: F16H 57/0441 Arrangements of pumps
• CPC Class Codes: F16H 57/045 Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
• CPC Class Codes: F16H 57/0453 Section walls to divide a gear sump
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A lubricating apparatus for a vehicle, comprises a first oil pump and a second oil pump, and a first supply passage connected to a discharge side of the first oil pump on which the lubricating oil is discharged so as to supply the lubricating oil discharged from the first oil pump to lubricated parts of the power transmission system, a second supply passage that is provided independently from the first supply passage and is connected to a discharge side of the second oil pump on which the lubricating oil is discharged so as to supply the lubricating oil discharged from the second oil pump to the lubricated parts of the power transmission system.

Claims

1. A lubricating apparatus applied to a vehicle having a power transmission system that transmits a drive force from a drive source via an output unit to driven wheels,

the lubricating apparatus comprising:

a first oil pump configured to be mechanically rotary-driven along with rotation of the output unit so as to discharge a lubricating oil;

a second oil pump configured to be rotary-driven by a rotary drive source different from the output unit so as to discharge the lubricating oil;

a first supply passage connected to a discharge side of the first oil pump on which the lubricating oil is discharged so as to supply the lubricating oil discharged from the first oil pump to lubricated parts of the power transmission system; and

a second supply passage that is provided independently from the first supply passage and is connected to a discharge side of the second oil pump on which the lubricating oil is discharged so as to supply the lubricating oil discharged from the second oil pump to the lubricated parts of the power transmission system,

wherein the first supply passage, between the first oil pump and the lubricated parts of the power transmission system, is not connected to the second supply passage, and wherein the second supply passage, between the second oil pump and the lubricated parts of the power transmission system, is not connected to the first supply passage.

2. The lubricating apparatus according to claim 1, wherein:

the first supply passage includes a first supply port that supplies the lubricating oil to the lubricated parts, and

the second supply passage includes a second supply port that is provided independently from the first supply port, and supplies the lubricating oil to the lubricated parts.

3. The lubricating apparatus according to claim 1, further comprising:

a reservoir that holds the lubricating oil;

a first intake passage connected to the first oil pump that sucks the lubricating oil from the reservoir; and

a second intake passage that is provided independently from the first intake passage, and is connected to the second oil pump which sucks the lubricating oil from the reservoir.

4. The lubricating apparatus according to claim 1, further comprising:

an oil storage provided to the first supply passage, the lubricating oil being supplied to the lubricated parts via the oil storage.

5. The lubricating apparatus according to claim 1, wherein:

the vehicle is a hybrid vehicle including an engine and a rotary machine configured to drive the hybrid vehicle as the drive source,

the vehicle includes an EV travel mode in which the vehicle travels by the rotary machine in a state in which the engine is stopped, and an HV travel mode in which the engine operates on a higher load side than that in the EV travel mode, and

the second oil pump is an oil pump mechanically rotary-driven along with rotation of the engine.

6. The lubricating apparatus according to claim 1, wherein:

the rotary drive source is an electric motor, and

the second oil pump is rotary-driven by the electric motor.

7. The lubricating apparatus according to claim 1, wherein:

the lubricated parts of the power transmission system are at least one of gears and bearings composing the power transmission system.