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US 10,730,523 B2Granted
Vehicle drive device and method of controlling vehicle drive device
AssigneeAisin Aw Co., Ltd.
InventorsQuentin Demain, Mitsuru Takahashi, Hiromitsu Kuboyama
Life of this patent
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Abstract
A vehicle drive device includes a control portion that is allowed to execute a control mode that controls multiple hydraulic elements to cause a vehicle in a stop state of an engine to start moving. The control mode starts controlling part of the multiple hydraulic elements before the engine is started, by using oil pressure accumulated in an accumulator (S8). The control mode starts controlling the rest of the multiple hydraulic elements by using oil pressure that is provided after the engine is started (S16).
Claims15
A vehicle drive device comprising:
- a speed change mechanism that changes a speed of power from an engine and that transmits the power to a drive wheel;
- an oil pressure pump that is driven by the engine;
- an accumulator that accumulates oil pressure;
- and
- a control portion that is allowed to execute a control mode that controls a plurality of hydraulic elements to cause a vehicle in a stop state of the engine to start moving, wherein
- the control mode starts controlling part of the plurality of hydraulic elements before the engine is started, by using the oil pressure accumulated in the accumulator, and
- the control mode starts controlling a rest of the plurality of hydraulic elements by using oil pressure that is provided after the engine is started, wherein
- the control mode is a first control mode,
- the control portion is allowed to execute a second control mode that controls fewer hydraulic elements than the plurality of hydraulic elements controlled in the first control mode to cause the vehicle in the stop state of the engine to start moving, and
- the second control mode starts controlling all the hydraulic elements to be controlled, before the engine is started, by using the oil pressure from the accumulator.
7 more elements
A vehicle drive device comprising:
- a speed change mechanism that changes a speed of power from an engine and that transmits the power to a drive wheel;
- an oil pressure pump that is driven by the engine;
- an accumulator that accumulates oil pressure;
- and
- a control portion that is allowed to execute a control mode that controls a plurality of hydraulic elements to cause a vehicle in a stop state of the engine to start moving, wherein
- the control mode starts controlling part of the plurality of hydraulic elements before the engine is started, by using the oil pressure accumulated in the accumulator, and
- the control mode starts controlling a rest of the plurality of hydraulic elements by using oil pressure that is provided after the engine is started, wherein
- the control mode is a first control mode,
- the control portion is allowed to execute a second control mode that controls one hydraulic element to cause the vehicle in the stop state of the engine to start moving, and
- the second control mode starts controlling the hydraulic element to be controlled, before the engine is started, by using the oil pressure from the accumulator.
7 more elements
A vehicle drive device comprising:
- a speed change mechanism that changes a speed of power from an engine and that transmits the power to a drive wheel;
- an oil pressure pump that is driven by the engine;
- an accumulator that accumulates oil pressure;
- a control portion that is allowed to execute a control mode that controls a plurality of hydraulic elements to cause a vehicle in a stop state of the engine to start moving;
- and
- an oil-pressure actuated parking mechanism, wherein
- the control mode starts controlling part of the plurality of hydraulic elements before the engine is started, by using the oil pressure accumulated in the accumulator,
- the control mode starts controlling a rest of the plurality of hydraulic elements by using oil pressure that is provided after the engine is started, and
- when the parking mechanism is included in the plurality of hydraulic elements, the control portion first performs control that releases a lock of the parking mechanism by using the oil pressure from the accumulator.
6 more elements
A vehicle drive device comprising:
- a speed change mechanism that changes a speed of power from an engine and that transmits the power to a drive wheel;
- an oil pressure pump that is driven by the engine;
- an accumulator that accumulates oil pressure;
- and
- a control portion that is allowed to execute a control mode that controls a plurality of hydraulic elements to cause a vehicle in a stop state of the engine to start moving, wherein
- the control mode starts controlling part of the plurality of hydraulic elements before the engine is started, by using the oil pressure accumulated in the accumulator,
- the control mode starts controlling a rest of the plurality of hydraulic elements by using oil pressure that is provided after the engine is started, and
- the control portion determines to start the engine on the basis of a fact that a rotational speed of the engine reaches a predetermined rotational speed.
5 more elements
Dependencies are inferred from the claim text.