Hydraulic control circuit for a clutch actuator and cooling of a hybrid-powertrain

A hydraulic control circuit for a hybrid powertrain comprising:

• a first pressure regulating valve comprising:
• a first port, a second port, a third port, a fourth port, and a fifth port in fluid communication with a first internal first bore, and
• a first valve stem having a first spool, a second spool, and a third spool slidingly disposed within the first internal bore, wherein a first fluid chamber is defined between the first spool and the second spool, and a second fluid chamber is defined between the second spool and the third spool;
• a second pressuring regulating valve comprising:
• a sixth port, a seventh port, an eighth port, a ninth port, and a tenth port in fluid communication with a second internal bore, and
• a second valve stem having a fourth spool, a fifth spool, and a sixth spool slidingly disposed within the second internal bore, wherein a third fluid chamber is defined between the fourth spool and the fifth spool, and a fourth fluid chamber is defined between the fifth spool and the sixth spool;
• a shift valve comprising:
• an eleventh port, a twelfth port, a thirteenth port, and a fourteenth port in fluid communication with a third internal bore, and
• a third valve stem having a seventh spool and an eighth spool slidingly disposed within the third internal bore, wherein a fifth fluid chamber is defined between the seventh spool and the eighth spool;
• a two-way check valve comprising a fifteenth port, a sixteenth port, and a seventeenth port, wherein the two-way check valve is operable to selectively seal one of the fifteenth port and the sixteenth port, thus selectively providing hydraulic communication between the fifteenth port with the seventeenth port, and between the sixteenth port with the seventeenth port;
• and
• a network of hydraulic pathways interconnecting the first pressure regulating valve, the second regulating valve, the shift valve, and the two-way check valve.

A hydraulic control circuit for a hybrid powertrain comprising:

• a first pressure regulating valve comprising:
• a first port, a second port, a third port, a fourth port, and a fifth port in fluid communication with a first internal first bore, and
• a first valve stem having a first spool, a second spool, and a third spool slidingly disposed within the first internal bore, wherein a first fluid chamber is defined between the first spool and the second spool, and a second fluid chamber is defined between the second spool and the third spool;
• a second pressuring regulating valve comprising:
• a sixth port, a seventh port, an eighth port, a ninth port, and a tenth port in fluid communication with a second internal bore, and
• a second valve stem having a fourth spool, a fifth spool, and a sixth spool slidingly disposed within the second internal bore, wherein a third fluid chamber is defined between the fourth spool and the fifth spool, and a fourth fluid chamber is defined between the fifth spool and the sixth spool;
• a shift valve comprising:
• an eleventh port, a tenth port, a thirteenth port, a fourteenth port, and an eighteenth port in fluid communication with a third internal bore, and
• a third valve stem having a seventh spool and an eighth spool slidingly disposed within the third internal bore, wherein a fifth fluid chamber is defined between the seventh spool and the eighth spool;
• a one-way check valve comprising an inlet port and an outlet port, wherein the one-way check valve is operable to selectively provide hydraulic communication between the first pressure regulating valve and both the shift valve and second pressure regulating valve;
• and
• a network of hydraulic pathways interconnecting the first pressure regulating valve, the second regulating valve, the shift valve, and the one-way check valve.