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1. WO1989005935 - SYSTEME DE DEMARRAGE ET DE PRODUCTION D'ENERGIE A MOTEUR

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

1. An engine starting and power generating system comprising:
an engine requiring a first torque level input to be started;
a dynamoelectric machine alternatively usable as a motor in an engine starting mode or a generator in a power generating mode and requiring a second torque level input, less than said first torque level input, to operate as a generator;
means interconnecting said engine and said machine including a differential having first, second and third rotary elements, first and second hydraulic units, a variable displacement hydraulic unit, first, second and third overrunning clutches, hydraulic lines connecting said first and second hydraulic units to said variable hydraulic unit and in parallel with each other and a check valve in one of said lines for hydraulically isolating said second hydraulic unit from said variable hydraulic unit when said system is in a power generating mode;
said first rotary element being connected via both said first and second clutches to said first hydraulic unit with said first and second clutches arranged to overrun in opposite directions of rotation and torque transmission, said second rotary element being connected to said dynamoelectric machine and to said variable displacement unit, and said third rotary element being connected to said second hydraulic unit via said third clutch, said third clutch being disposed to begin to overrun when said engine is approaching idle speed during an engine starting mode;

said first hydraulic unit and said variable hydraulic unit being sized so as to, together with said differential provide said second torque level to said dynamoelectric machine from said engine during a power generating mode; and said first and second hydraulic units and said variable, hydraulic unit being sized so as to together with said, differential, provide said first torque level from -said dynamoelectric machine to said engine during an engine starting mode.

2. The engine starting and power generating system of claim 1 wherein at least one cf said first and second-hydraulic units is a fixed displacement hydraulic unit.

3. An engine starting and power generating system, comprising:
an engine requiring a first torque level input to.be*. started;
a dynamoelectric machine alternatively usable . as a motor in an engine starting mode or a generator in a power generating mode and requiring a second torque level input, less than said first torque level input, to operate as a generator;
means interconnecting said engine and said machine including a mechanical summing apparatus having first, second and third movable elements, first and second hydraulic units, a variable displacement hydraulic unit, first, second and third coupling devices, hydraulic lines connecting said first and second hydraulic units to said variable hydraulic unit and in parallel with each other, and a valve in one of said lines for hydraulically isolating said second hydraulic unit from said variable hydraulic unit when said system is in a power generating mode;

said first element being connected via both said first and second coupling devices to said first hydraulic unit with said first and second coupling devices arranged in parallel so as to disengage in opposite directions of movement and torque transmission, said second rotary element being connected to said dynamoelectric machine and to said variable displacement unit, and said third element being connected to said second hydraulic unit via said third coupling device, said third coupling device being disposed to begin to disengage when said engine is approaching idle speed during an engine starting mode;
said first hydraulic unit and said variable hydraulic unit being sized so as to, together with said mechanical summing apparatus provide said second torque level to said dynamoelectric machine from said engine during a power generating mode; and
said first and second hydraulic units and said variable hydraulic unit being sized so as to together with said mechanical summing apparatus, provide said first torque level from said dynamoelectric machine to said engine during an engine starting mode.

4. The engine starting and power generating system of claim 3 wherein said mechanical summing apparatus is a differential and said movable elements comprise a carrier and at least one ring gear.

5. The engine starting and power generating system of claim 4 wherein said coupling devices are clutches.

6. The engine starting and power generating system of claim 5 wherein said clutches are overrunning clutches .

7. The engine starting and power generating system* ox claim 3 wherein said first hydraulic unit has at least two different displacements .

8. An engine starting and power generating system comprising:
an engine requiring a first torque level input to be. started;
a dynamoelectric machine alternatively usable as a motor in an engine starting mode or a generator in a power generating mode and requiring a second torque level input, less than said first torque level input, to operate in said power generating mode;
means interconnecting said engine and said machine . including a differential, first, second and third hydraulic units, said third hydraulic unit being a variable displacement hydraulic unit, and hydraulic lines connecting sa d first and second hydraulic units to said third, hydraulic unit and in parallel with each other;
said first and third hydraulic units being sized so as to, together with said diff rential, provide said second torque level to said dynamoelectric machine from said engine during a power generating mode;
said first, second and third hydraulic units being sized so as to, together with said differential, provide said first torque level from said dynamoelectric machine to said engine during an engine starting mode; and
said third hydraulic unit being coupled to said dynamoelectric machine;
said first hydraulic unit being selectively coupled to said differential;
said second hydraulic unit being coupled to said engine; and means for selectively isolating said second hydraulic unit from the remainder of said system when the engine approaches a given speed during an engine starting mode.

9. The engine starting and power generating system of claim 8 wherein said isolating means decouples said second hydraulic unit from said engine and blocks hydraulic flow from said first and third hydraulic units to said second hydraulic unit during said power generating mode.

10. The engine starting and power generating system of claim 8 wherein said first hydraulic unit is variable between at least two different displacements.

AMENDED CLAIMS
[received by the International Bureau
on 1 June 1989 (01.06.89);
original claims 1-10 replaced by amended claims 1-10 (5 pages) ]

1. An engine starting and power generating system comprising:
an engine requiring a first torque level input to be started;
a dynamoelectric machine alternatively usable as a motor in an engine starting mode or a generator in a power generating mode and requiring a second torque level input, less than said first torque level input, -to
operate as a generator;
means interconnecting said engine and said machine . including a differential having first, second and third rotary elements, first and second hydraulic units, a variable displacement hydraulic unit, first, second an third overrunning clutches, hydraulic lines connecting said first and second hydraulic units to said variable hydraulic unit and in parallel with each other and a.
check valve in one of said lines for hydraulically
isolating said second hydraulic unit from said variable hydraulic unit when said system is in a power generating mode;
said first rotary element being connected via both . said first and second clutches to said first hydraulic unit with said first and second clutches arranged to overrun in opposite directions of rotation and torque transmission, said second rotary element being connected to said Dynamoelectric machine and to said variable displacement unit, and said third rotary element being connected to said second hydraulic unit via said third clutch, said third clutch being disposed to begin to overrun when said engine is approaching idle speed during an engine starting mode;

said first hydraulic unit and said variable
hydraulic unit being sized so as to, together with said differential, provide said first torque level from said dynamoelectric machine to said engine during an engine starting mode.

2. The engine starting and power generating system of claim 1 wherein at least one of said first and second hydraulic units is a fixed displacement hydraulic unit.

3. An engine starting and power generating system comprising:
an engine requiring a first torque level input to be started;
a dynamoelectric machine alternatively usable as a motor in an engine starting mode or a generator in a power generating mode and requiring a second torque level input, less than said first torque level input, to operate as a generator;
means interconnecting said engine and said machine including a mechanical summing apparatus having first, second and third movable elements, first and second hydraulic units, a variable displacement hydraulic unit, first, second and third coupling devices, hydraulic lines connecting said first and second hydraulic units to said variable hydraulic unit and in parallel with each other, and a valve in one of said lines for hydraulically isolating said second hydraulic unit from said variable hydraulic unit when said system is in a power generating mode;

said first element being connected via both said first and second coupling devices to said first hydraulic unit with said first and second coupling devices arranged in parallel so as to disengage in opposite directions of movement and torque transmission, said second rotary element being connected to said dynamoelectric machine and to said variable displacement unit, and said third element being connected to said second hydraulic unit via said third coupling device, said third coupling device-being disposed to begin to disengage when said engine is approaching idle speed during an engine starting mode;
said first hydraulic unit and said variable
hydraulic unit being sized so as to, together with said mechanical summing apparatus provide said second torque level to said dynamoelectric machine from said engine during a power generating mode; and
said first and second hydraulic units and said variable hydraulic unit being sized so as to, together with said mechanical summing apparatus, provide said first torque level from said dynamoelectric machine to said engine during an engine starting mode.

4. The engine starting and power generating system of claim 3 wherein said mechanical summing apparatus is a differential and said movable elements comprise a carrier and at least one ring gear.

5. The engine starting and power generating system of claim 4 wherein said coupling devices are clutches.

6. The engine starting and power generating system of claim 5 wherein said clutches are overrunning clutches.

7. The engine starting and power generating system of claim 3 wherein said first hydraulic unit has at least two different displacements.

8. An engine starting and power generating system comprising:
an engine requiring a first torque level input to be started;
a dynamoelectric machine alternatively usable as a motor in an engine starting mode or a generator in a power generating mode and requiring a second torque level input, less than said first torque level input, to operate in said power generating mode;
means interconnecting said engine and said machine including a differential, first, second and third
hydraulic units, said third hydraulic unit being a variable displacement hydraulic unit, and hydraulic lines connecting said first and second hydraulic units to said third hydraulic unit and in parallel with each other;
said first and third hydraulic units being sized so as to, together with said differential, provide said second torque level to said dynamoelectric machine from said engine during a power generating mode;
said first, second and third hydraulic units being sized so as to, together with said differential, provide said first torque level from said dynamoelectric machine to said engine during an engine starting mode; and
said third hydraulic unit being coupled to said dynamoelectric machine;
said first hydraulic unit being selectively coupled to said differential;
said second hydraulic unit being coupled to said engine; and means for selectively isolating said second
hydraulic unit from the remainder of said system when- the engine approaches a given speed during an engine starting mode.

9. The engine starting and power generating system of claim 8 wherein said isolating means decouples said second hydraulic unit from said engine and blocks hydraulic flow from said first and third hydraulic units to said second hydraulic unit during said power
generating mode.

10. The engine starting and power generating system of claim 8 wherein said first hydraulic unit is variable between at least two different displacements.