Clogged filter detection system and method
First Claim
1. A hydraulic system for a hybrid vehicle, the hybrid vehicle including a motor, said hydraulic system comprising:
- a sump with a supply of hydraulic fluid;
a network of valves and conduits;
pump means for drawing hydraulic fluid from said sump and delivery of said hydraulic fluid to said network;
a fluid filter positioned in said network;
a control valve positioned in said network downstream from said fluid filter;
a primary output conduit connected to said control valve for supplying hydraulic fluid to a primary demand;
a secondary output conduit connected to said control valve for supplying hydraulic fluid to a secondary demand, wherein said control valve is constructed and arranged to supply hydraulic fluid to said secondary demand only after said primary demand is satisfied; and
temperature monitoring means for monitoring an internal temperature of said motor and for determining if the fluid flow out of said fluid filter satisfies said primary demand.
1 Assignment
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Accused Products
Abstract
A hydraulic system for a hybrid module which is located between an engine and a transmission includes a parallel arrangement of a mechanical pump and an electric pump. Each pump is constructed and arranged to deliver oil to other portions of the hydraulic system depending on the operational mode. Three operational modes are described including an electric mode, a transition mode, and a cruise mode. Included is a lube splitter valve which prioritizes the delivery of oil between downstream components and the motor (eMachine). The motor temperature is monitored and an elevated motor temperature provides an indication of a clogged oil filter.
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Citations
25 Claims
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1. A hydraulic system for a hybrid vehicle, the hybrid vehicle including a motor, said hydraulic system comprising:
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a sump with a supply of hydraulic fluid; a network of valves and conduits; pump means for drawing hydraulic fluid from said sump and delivery of said hydraulic fluid to said network; a fluid filter positioned in said network; a control valve positioned in said network downstream from said fluid filter; a primary output conduit connected to said control valve for supplying hydraulic fluid to a primary demand; a secondary output conduit connected to said control valve for supplying hydraulic fluid to a secondary demand, wherein said control valve is constructed and arranged to supply hydraulic fluid to said secondary demand only after said primary demand is satisfied; and temperature monitoring means for monitoring an internal temperature of said motor and for determining if the fluid flow out of said fluid filter satisfies said primary demand. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A hydraulic system for a vehicle, the vehicle including a motor, said hydraulic system comprising:
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a sump with a supply of fluid; an arrangement of valves and conduits; pump means for drawing fluid from said sump and delivery of said fluid to said arrangement; a filter positioned in said arrangement; a valve positioned in said arrangement downstream from said filter; a first output conduit connected to said valve for supplying fluid to a first demand; and a second output conduit connected to said valve for supplying fluid to a second demand, wherein said valve is constructed and arranged to supply fluid to said second demand only after said first demand has been met as determined by the temperature monitoring means which controls the operation of said valve based on the temperature of the motor. - View Dependent Claims (17, 18)
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19. A method of determining a clogged fluid filter condition within a hydraulic system which is associated with a hybrid vehicle, the hybrid vehicle including a motor, said method comprising the following steps:
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providing a fluid filter as a part of said hydraulic system; providing a control valve downstream from said fluid filter as part of said hydraulic system, said control valve being in flow communication with said fluid filter; providing a primary output conduit connected to said control valve for supplying hydraulic fluid to a primary demand; providing a secondary output conduit connected to said control valve for supplying hydraulic fluid to a secondary demand; providing a temperature sensor to sense an internal temperature of said motor; monitoring said temperature sensor for monitoring an internal temperature of said motor and for determining if the fluid flow out of said fluid filter satisfies the primary demand; and wherein said control valve is constructed and arranged for supplying hydraulic fluid to said secondary demand only after satisfying said primary demand. - View Dependent Claims (20, 21)
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22. A method of determining a clogged fluid filter condition within a hydraulic system which is associated with a hybrid vehicle, the hybrid vehicle including a motor, said method comprising the following steps:
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providing a fluid filter as a part of said hydraulic system; providing a control valve downstream from said fluid filter as part of said hydraulic system, said control valve being in flow communication with said fluid filter; providing a primary output conduit connected to said control valve for supplying hydraulic fluid to a primary demand; providing a secondary output conduit connected to said control valve for supplying hydraulic fluid to a secondary demand; setting a target internal motor temperature which is representative of adequate hydraulic fluid flow out of said fluid filter; connecting a temperature sensor to said motor for determining said internal motor temperature; monitoring the internal motor temperature; and comparing said internal motor temperature to said target internal motor temperature as a means to determine when said hydraulic fluid flow out of said fluid filter is not adequate. - View Dependent Claims (23, 24, 25)
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Specification