Control device of internal combustion engine and control method of internal combustion engine
By using the first rotating motor in the internal combustion engine to forcibly rotate the crankshaft and control the fuel injection amount and valve opening, the problem of difficulty in maintaining the air-fuel ratio when the internal combustion engine is started is solved, the emission of unburned HC is reduced, and clean combustion is achieved.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0045] figure 1is a block diagram of a main part of a hybrid vehicle 100 including an internal combustion engine control device according to the present invention.
[0046] refer to figure 1 , a hybrid vehicle 100 includes an engine (internal combustion engine) 1 , a power split mechanism 2 , motor generators MG1 and MG2 , an inverter 7 , a battery B, a control device 9 , a speed reducer 5 , and drive wheels 6 .
[0047] Engine 1 receives fuel supplied from a fuel tank (not shown), and is started by motor generator MG1.
[0048] The power split mechanism 2 uses planetary gears and includes first to third rotation shafts. If the rotations of any two of these rotation axes are determined, the rotations of the remaining axes are forcibly determined. As the power distribution mechanism 2, for example, a planetary gear mechanism having a sun gear, a carrier, and a ring gear as three rotation shafts can be used. The first rotation shaft of the power distribution mechanism 2 is m...
Embodiment 2
[0094] In Embodiment 2, in addition to the fuel injection quantity control described in Embodiment 1, when the engine is started, the parameters that affect fuel gasification such as throttle opening and VVT advance angle remain unchanged until the fuel is injected into the intake port. The attachment is stable, e.g. until the Figure 4 Near the point in time at the end of the second cycle, or until the negative pressure stabilizes. Especially in the case of an electronic VVT in which the valve timing can be controlled by an electric actuator from a moment before the engine is started, said parameter does not change until the above-mentioned state is obtained after the engine is started.
[0095] Figure 6 It is a flowchart showing a control structure of a program for executing the control at the start-up according to the second embodiment. The processing of this flowchart is called from the main program and executed every certain period of time or whenever a predetermined c...
Embodiment 3
[0110] According to Embodiment 3, at engine start, the engine speed is controlled to a constant speed by motor generator MG1 until the fuel attachment to the intake port is stabilized, for example, until the second cycle of fuel injection is completed, or until the negative pressure is stabilized. Then, after the negative pressure stabilizes, the engine speed is free.
[0111] Figure 8 is a flowchart showing the control structure of the program executed according to the third embodiment.
[0112] refer to Figure 8 , if the motor generator control at startup is first started, it is judged in step S21 whether it is during startup. If it is already after startup in step S21, the process proceeds to step S24. On the other hand, if it is during startup, the process proceeds to step S22.
[0113] In step S22, it is judged whether the negative pressure of the air inlet has stabilized. This judgment can be made by using figure 1 The negative pressure sensor 12 in the motor mea...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More