Hydraulic system and method for a hybrid vehicle
First Claim
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1. A hydraulic system for a hybrid electric vehicle comprising:
- a sump containing hydraulic fluid;
a main regulator valve;
a main regulator by-pass valve;
a first control solenoid;
a second control solenoid;
a mechanical pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator valve for delivering hydraulic fluid from said sump to said main regulator valve;
an electric pump constructed and arranged in fluid communication with said sump and in direct fluid communication with said main regulator by-pass valve for delivering hydraulic fluid directly from said sump to said main regulator by-pass valve; and
wherein said main regulator valve is constructed and arranged to deliver a control flow of hydraulic fluid directly to said first control solenoid and directly to said second control solenoid.
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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. Various monitoring and control features are incorporated into the hydraulic system.
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Citations
35 Claims
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1. A hydraulic system for a hybrid electric vehicle comprising:
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a sump containing hydraulic fluid; a main regulator valve; a main regulator by-pass valve; a first control solenoid; a second control solenoid; a mechanical pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator valve for delivering hydraulic fluid from said sump to said main regulator valve; an electric pump constructed and arranged in fluid communication with said sump and in direct fluid communication with said main regulator by-pass valve for delivering hydraulic fluid directly from said sump to said main regulator by-pass valve; and wherein said main regulator valve is constructed and arranged to deliver a control flow of hydraulic fluid directly to said first control solenoid and directly to said second control solenoid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A hydraulic system for a hybrid electric vehicle comprising:
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a sump containing hydraulic fluid; a main regulator valve; a main regulator by-pass valve which is constructed and arranged to be operable in a first condition for control of fluid to said main regulator valve and in a second condition for control of fluid flow to a downstream fluid need; a mechanical pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator valve for delivering hydraulic fluid from said sump to said main regulator valve; and an electric pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator by-pass valve for delivering hydraulic fluid from said sump to said main regulator by-pass valve. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A hydraulic system for a hybrid electric vehicle comprising:
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a sump containing hydraulic fluid; a main regulator valve; a main regulator by-pass valve; a mechanical pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator valve for delivering hydraulic fluid from said sump to said main regulator valve; and an electric pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator by-pass valve for delivering hydraulic fluid from said sump to said main regulator by-pass valve, wherein said hybrid electric vehicle includes a hybrid module housing and said sump is constructed and arranged as a sump module assembly which is positioned beneath said hybrid module housing, and wherein said sump module assembly includes a control module assembly and a sump body. - View Dependent Claims (17, 18)
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19. A hydraulic system for a hybrid electric vehicle comprising:
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a sump containing hydraulic fluid; a main regulator valve; a main regulator by-pass valve; a clutch trim valve which is constructed and arranged as a spool valve; a mechanical pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator valve for delivering hydraulic fluid from said sump to said main regulator valve; and an electric pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator by-pass valve for delivering hydraulic fluid from said sump to said main regulator by-pass valve; and first and second control solenoids, wherein said hybrid electric vehicle has three operational modes associated with said hydraulic system, wherein said first control solenoid and said second control solenoid each have an operational condition which is determined by which of the three operational modes represents the operational mode of the hybrid electric vehicle, wherein said main regulator valve is constructed and arranged to deliver a control flow of hydraulic fluid directly to said first control solenoid and directly to said second control solenoid. - View Dependent Claims (20, 21)
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22. A hydraulic system for a hybrid electric vehicle comprising:
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a sump containing hydraulic fluid; a main regulator valve; a main regulator by-pass valve; a clutch trim valve which is constructed and arranged as a spool valve; a mechanical pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator valve for delivering hydraulic fluid from said sump to said main regulator valve; and an electric pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator by-pass valve for delivering hydraulic fluid from said sump to said main regulator by-pass valve, wherein the hybrid electric vehicle has three operational modes associated with the hydraulic system, including an eMode, a transition mode and a cruise mode, wherein said main regulator valve is constructed and arranged to deliver a control flow of hydraulic fluid directly to said first control solenoid and directly to said second control solenoid. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A hydraulic system for a hybrid electric vehicle comprising:
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a sump containing hydraulic fluid; a main regulator valve; a main regulator by-pass valve; a clutch trim valve which is constructed and arranged as a spool valve; a first pump in fluid communication with said sump and being constructed and arranged for supplying fluid to said main regulator by-pass valve, said main regulator valve having two pressure states which are determined by a fluid input from said main regulator by-pass valve; and a second pump constructed and arranged in fluid communication with said sump and in direct fluid communication with said main regulator valve for delivering hydraulic fluid directly from said sump to said main regulator valve. - View Dependent Claims (30, 31, 32)
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33. A hydraulic system for a hybrid electric vehicle comprising:
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a sump containing hydraulic fluid; a main regulator valve; a main regulator by-pass valve; a clutch trim valve which is constructed and arranged as a spool valve; a mechanical pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator valve for delivering hydraulic fluid from said sump to said main regulator valve; and an electric pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator by-pass valve for delivering hydraulic fluid from said sump to said main regulator by-pass valve, wherein the hybrid electric vehicle has three operational modes associated with the hydraulic system, including an eMode, a transition mode and a cruise mode, wherein when said hybrid electric vehicle is in said eMode, a first control solenoid is in an OFF operational condition and a second control solenoid is in an OFF operational condition.
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34. A hydraulic system for a hybrid electric vehicle comprising:
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a sump containing hydraulic fluid; a main regulator valve; a main regulator by-pass valve; a clutch trim valve which is constructed and arranged as a spool valve; a mechanical pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator valve for delivering hydraulic fluid from said sump to said main regulator valve; and an electric pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator by-pass valve for delivering hydraulic fluid from said sump to said main regulator by-pass valve, wherein the hybrid electric vehicle has three operational modes associated with the hydraulic system, including an eMode, a transition mode and a cruise mode, wherein when said hybrid electric vehicle is in said transition mode, a first control solenoid is in an OFF operational condition and a second control solenoid is in an ON operational condition.
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35. A hydraulic system for a hybrid electric vehicle comprising:
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a sump containing hydraulic fluid; a main regulator valve; a main regulator by-pass valve; a clutch trim valve which is constructed and arranged as a spool valve; a mechanical pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator valve for delivering hydraulic fluid from said sump to said main regulator valve; and an electric pump constructed and arranged in fluid communication with said sump and in fluid communication with said main regulator by-pass valve for delivering hydraulic fluid from said sump to said main regulator by-pass valve, wherein the hybrid electric vehicle has three operational modes associated with the hydraulic system, including an eMode, a transition mode and a cruise mode, wherein when said hybrid electric vehicle is in said cruise mode, a first control solenoid is in an ON operational condition and a second control solenoid is in an ON operational condition.
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Specification