Engine start controlling apparatus and method for hybrid vehicle
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A technology of a hybrid vehicle and a starting control device, which is applied in directions such as hybrid vehicles, engine control, and engine starting to achieve the effect of preventing torque loss.
Inactive Publication Date: 2010-08-04
NISSAN MOTOR CO LTD
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[0004] However, in the conventional hybrid vehicle engine start control device, when the clutch engagement capacity is gradually increased when the engine is started, the engagement capacity corresponding to the The torque will be taken away by the motor, so when the engine is started while driving, there may be a so-called torque loss feeling that the torque acting on the output shaft torque is lost.
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no. 1 example
[0059] First, the configuration of the drive system of the hybrid vehicle will be described. figure 1 It is an overall system diagram showing a rear-wheel drive hybrid vehicle to which the engine start control device of the first embodiment is applied. The driving system of the hybrid vehicle of the first embodiment, such as figure 1 As shown, it has: engine E, first clutch CL1, motor generator MG, second clutch CL2, automatic transmission AT, drive shaft PS as vehicle drive shaft, differential DF, left main drive shaft DSL, right main drive shaft Drive shaft DSR, left rear wheel RL (drive wheel), right rear wheel RR (drive wheel). In addition, FL is a left front wheel, and FR is a right front wheel.
[0060] The engine E is, for example, a gasoline engine, and controls the valve opening of a throttle valve and the like based on control commands from an engine controller 1 described later. In addition, a flywheel FW is provided on the engine output shaft.
[0061] The fi...
no. 2 example
[0133] In the first embodiment, when the engagement capacity of the first clutch CL1 is increased, engagement is performed through the first engagement phase and the second engagement phase. On the other hand, in the second embodiment, there is a difference in that there is a third connection stage in addition to the first connection stage and the second connection stage.
[0134] Figure 11 is a flowchart showing engine start control processing in the second embodiment, Figure 12 It is a figure which shows the map of the connection capacity of CL1 of 2nd Example. Since the basic control is the same as that of the first embodiment (step 401 to step 405, step 409 to step 412, and step 418 to step 419), only the different steps will be described.
[0135] (engine start control)
[0136] First, in the case of step 402 similar to the first embodiment, when it is determined that the accelerator opening APO is not greater than a predetermined value and the process proceeds to st...
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Abstract
The present invention provides an engine start control device of a hybrid vehicle which can suppress feeling of torque omission even if an engine is started into operation using a motor currently used as a power source while cruising. A hybrid-vehicle engine start controlling apparatus includes an engine, a motor connected to a vehicle driving shaft, a first engaging element provided between the engine and the motor for connecting and disconnecting the engine and the motor and engine start control means. The engine start controlling means is configured to start the engine by increasing a driving torque of the motor and increasing a transmission torque capacity of the first engaging element so as to increase a rotation speed of the engine by the driving torque of the motor in a state in which the engine is stopped and the first engaging element is released. The engine start controlling means includes a first engaging phase for increasing the transmission torque capacity of the first engaging element at a first velocity, and a second engaging phase for changing the transmission torque capacity at a second velocity lower than the first velocity.
Description
technical field [0001] The present invention relates to an engine start control device for a hybrid vehicle, which has an engine and an electric motor as a power source, and has an electric-motor running mode for running with only an electric motor as a power source, and an engine-use running mode for running with an engine included in a power source. driving mode. Background technique [0002] Patent Document 1 discloses a hybrid vehicle having an electric motor running mode and an engine running mode, and when switching from the electric motor running mode to the engine running mode, a clutch provided between the electric motor and the engine is engaged. , by using the electric motor used in driving to start the engine, the engine can be started without additionally installing a starter motor or the like. [0003] Patent Document 1: (Japanese) Unexamined Patent Publication No. 11-82260 [0004] However, in a conventional engine start control device for a hybrid vehicle,...
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