Drive control device for hybrid vehicle
First Claim
1. teaches a drive control device for a hybrid vehicle provided with:
- a differential device which includes a first differential mechanism and a second differential mechanism and which has four rotary elements; and
an engine,a first electric motor,a second electric motor andan output rotary member which are respectively connected to said four rotary elements, andwherein one of said four rotary elements is constituted by a rotary component of said first differential mechanism and a rotary component of said second differential mechanism which are selectively connected to each other through a clutch, andone of the rotary components of said first and second differential mechanisms which are selectively connected to each other through said clutch is selectively fixed to a stationary member through a brake,said drive control device comprising;
an engine start control portion configured to switch an operating state of said clutch during cranking of said engine to raise its speed for starting said engine, andwherein said engine start control portion includes;
a first clutch controlling portion configured to place said clutch in one of a released state and an engaged state in which a difference between a first dwelling speed to be established in a first half period of a rise of a speed of said engine and a first resonance speed of a drive line extending from said engine to said first electric motor connected to said first differential mechanism through a torsional damper is larger in the other of said released and engaged states,said first resonance speed corresponding to an explosion 1-order frequency of said engine; and
a second clutch controlling portion configured to place said clutch in one of said released and engaged states in which a difference between a second dwelling speed to be established in a second half period of the rise of the speed of said engine and a predetermined second resonance speed of said drive line is larger in the other of said released and engaged states,said predetermined second resonance speed corresponding to a revolution 0.5-order pulsation frequency of said engine.
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Accused Products
Abstract
A drive control device for a hybrid vehicle is provided with a differential device including four rotary elements; and an engine, first and second electric motors and an output rotary member which are respectively connected to the four rotary elements. One of the four rotary elements is constituted by a rotary component of a first differential mechanism and a rotary component of a second differential mechanism selectively connected through a clutch, and one of the rotary components is selectively fixed to a stationary member through a brake. The drive control device comprises: an engine start control portion configured to switch an operating state of the clutch during cranking of the engine to raise its speed for starting the engine. The engine start control portion includes: a first clutch controlling portion configured to place the clutch in one of a released state and an engaged state in which a difference between a first dwelling speed to be established in a first half period of a rise of a speed of the engine and a first resonance speed of a drive line extending from the engine to the first electric motor connected to the first differential mechanism through a torsional damper is larger in the other of the released and engaged states, the first resonance speed corresponding to an explosion 1-order frequency of the engine; and a second clutch controlling portion configured to place the clutch in one of the released and engaged states in which a difference between a second dwelling speed to be established in a second half period of the rise of the speed of the engine and a predetermined second resonance speed of the drive line is larger in the other of the released and engaged states, the predetermined second resonance speed corresponding to a revolution 0.5-order pulsation frequency of the engine.
18 Citations
6 Claims
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1. teaches a drive control device for a hybrid vehicle provided with:
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a differential device which includes a first differential mechanism and a second differential mechanism and which has four rotary elements; and an engine, a first electric motor, a second electric motor and an output rotary member which are respectively connected to said four rotary elements, and wherein one of said four rotary elements is constituted by a rotary component of said first differential mechanism and a rotary component of said second differential mechanism which are selectively connected to each other through a clutch, and one of the rotary components of said first and second differential mechanisms which are selectively connected to each other through said clutch is selectively fixed to a stationary member through a brake, said drive control device comprising; an engine start control portion configured to switch an operating state of said clutch during cranking of said engine to raise its speed for starting said engine, and wherein said engine start control portion includes; a first clutch controlling portion configured to place said clutch in one of a released state and an engaged state in which a difference between a first dwelling speed to be established in a first half period of a rise of a speed of said engine and a first resonance speed of a drive line extending from said engine to said first electric motor connected to said first differential mechanism through a torsional damper is larger in the other of said released and engaged states, said first resonance speed corresponding to an explosion 1-order frequency of said engine; and a second clutch controlling portion configured to place said clutch in one of said released and engaged states in which a difference between a second dwelling speed to be established in a second half period of the rise of the speed of said engine and a predetermined second resonance speed of said drive line is larger in the other of said released and engaged states, said predetermined second resonance speed corresponding to a revolution 0.5-order pulsation frequency of said engine. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification