Hydraulic system and method for a hybrid vehicle
First Claim
Patent Images
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, which is in direct fluid communication with said main regulator valve;
a mechanical 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;
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;
a controller for controlling the operational status of each pump based on an operational mode of the hybrid electric vehicle;
a clutch trim valve;
a first control solenoid constructed and arranged in fluid communication with said main regulator by-pass valve;
a second control solenoid constructed and arranged in fluid communication with said clutch trim 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; and
wherein said first control solenoid and 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.
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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.
85 Citations
13 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, which is in direct fluid communication with said main regulator valve; a mechanical 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; 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; a controller for controlling the operational status of each pump based on an operational mode of the hybrid electric vehicle; a clutch trim valve; a first control solenoid constructed and arranged in fluid communication with said main regulator by-pass valve; a second control solenoid constructed and arranged in fluid communication with said clutch trim 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; and wherein said first control solenoid and 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.
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2. 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 direct fluid communication with said main regulator valve for delivering hydraulic fluid directly 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, wherein the hybrid electric vehicle has three operational modes associated with the hydraulic system, including an eMode, a transition mode and a cruise mode; and wherein when said hybrid electric vehicle is in said eMode, the first control solenoid is in an OFF operational condition and said second control solenoid is in an OFF operational condition. - View Dependent Claims (3)
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4. 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 direct fluid communication with said main regulator valve for delivering hydraulic fluid directly 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, wherein the hybrid electric vehicle has three operational modes associated with the hydraulic system, including an eMode, a transition mode and a cruise mode; and wherein when said hybrid electric vehicle is in said transition mode, said first control solenoid is in an OFF operational condition and said second control solenoid is in an ON operational condition. - View Dependent Claims (5)
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6. 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 direct fluid communication with said main regulator valve for delivering hydraulic fluid directly from said sump to said main regulator valve; and 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, wherein the hybrid electric vehicle has three operational modes associated with the hydraulic system, including an eMode, a transition mode and a cruise mode; and wherein said hybrid electric vehicle is in said cruise mode, said first control solenoid is in an ON operational condition and said second control solenoid is in an ON operational condition. - View Dependent Claims (7)
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8. 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 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, the first control solenoid is in an OFF operational condition and said second control solenoid is in an OFF operational condition. - View Dependent Claims (9)
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10. 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 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, said first control solenoid is in an OFF operational condition and said second control solenoid is in an ON operational condition. - View Dependent Claims (11)
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12. 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 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, 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 hybrid electric vehicle is in said cruise mode, said first control solenoid is in an ON operational condition and said second control solenoid is in an ON operational condition. - View Dependent Claims (13)
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Specification