In-vehicle seal integrity verification system

Patent metadata

Field	Value
Publication number	US-10775261-B2
Application number	US-201815894392-A
Country	US
Kind code	B2
Filing date	Feb 12, 2018
Priority date	Feb 12, 2018
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A seal integrity verification system includes a pressure source, a valve, and a pressure sensor. The pressure source is fluidly connected to a housing having at least one sealing member. The valve is fluidly connected to the pressure source and the housing. The valve is movable between a first open position and a closed position. The pressure sensor is arranged to provide a first signal indicative of a pressure within the housing.

First claim

Having thus described the present disclosure, it is claimed:

1. An electric power steering system, comprising:
an electric power steering unit having a housing provided with at least one sealing member; and
a seal integrity verification system, comprising:
a pressure sensor disposed within the housing and arranged to monitor a pressure within the housing,
a pressure source disposed on the housing and fluidly connected to the housing, and
a control unit in communication with the pressure source and the pressure sensor.

2. The electric power steering system of claim 1 , wherein the seal integrity verification system further comprising:
a valve operatively connected to the housing, fluidly connected to the pressure source and housing, and in communication with the control unit.

3. The electric power steering system of claim 2 , wherein the valve is movable between a closed position to inhibit a fluid from the pressure source to at least one of enter and exit the housing and an open position to enable the fluid to at least one of enter and exit the housing.

4. The electric power steering system of claim 3 , wherein the control unit is programmed to command the valve to move towards the open position and command the pressure source to operate to provide the fluid to enter the housing at least until a predetermined fluid pressure is achieved within the housing.

5. The electric power steering system of claim 4 , wherein the control unit is programmed to command the valve to move towards the closed position in response to the predetermined fluid pressure being achieved within the housing.

6. The electric power steering system of claim 5 , wherein the pressure source is further arranged to monitor a pressure decay within the housing.

7. The electric power steering system of claim 6 , wherein the control unit is programmed to command the valve to move towards the open position.

8. An electric power steering system, comprising:
an electric power steering unit having a housing provided with at least one sealing member; and
a seal integrity verification system spaced apart from the housing, comprising:
a pressure sensor that is arranged to monitor a pressure within the housing, and
a pressure source fluidly connected to the housing through a valve that is fluidly connected to the pressure source and the housing, the valve movable between an open position and a closed position.

9. The electric power steering system of claim 8 , further comprising:
a control unit in communication with the pressure source, the pressure sensor, and the valve.

10. The electric power steering system of claim 8 , further comprising:
a first conduit extending between a port defined by the housing and the seal integrity verification system.

Assignees

• Steering Solutions Ip Holding

Inventors

• Haubenstricker Kevin J
• Vorwerck Conrad G

Classifications

• G01M3/26 Primary

  by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors · CPC title

• B62D5/0406

  including housing for electronic control unit · CPC title

• B62D5/0403

  characterised by constructional features, e.g. common housing for motor and gear box · CPC title

• B60R16/0231

  Circuits relating to the driving or the functioning of the vehicle (monitoring tyres B60C23/00; indicating overspeed B60K31/00; for dash boards B60K37/00, B60Q3/10; for indicating emergencies B60Q1/52; brake control systems B60T; registering or indicating the working of vehicles G07C5/00; measuring distance G01C, e.g. combinations of speed and distance G01C23/00; engine indicators G01L; measuring speed or acceleration G01P) · CPC title

• G01M17/007

  Wheeled or endless-tracked vehicles (G01M17/08 takes precedence) · CPC title