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Engine control device and method

A control device and engine technology, applied in engine control, machine/engine, electrical control, etc.

Inactive Publication Date: 2019-12-03
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in order to suppress the occurrence of shift shock, there are cases where the control range of the throttle opening is restricted during shifting so as to suppress engine torque.
In this way, depending on the operating conditions of the engine, the control range of the throttle opening may be limited.

Method used

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  • Engine control device and method
  • Engine control device and method
  • Engine control device and method

Examples

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Embodiment Construction

[0015] Below, refer to Figure 1 to Figure 7 , an embodiment of the engine control device of the present invention will be described in detail. The engine control device of the present embodiment is applied to a naturally aspirated engine mounted on a vehicle.

[0016] like figure 1 As shown, the engine 10 to which this embodiment is applied is provided with an intake passage 12 through which intake air flowing into the combustion chamber 11 flows, and an exhaust passage 13 through which exhaust gas discharged from the combustion chamber 11 flows. Furthermore, the engine 10 is provided with an intake valve 14 that communicates / blocks the intake passage 12 with the combustion chamber 11 by opening / closing the valve, and communicates / blocks the exhaust passage 13 with the combustion chamber 11 by opening / closing the valve. Partitioned exhaust valve 15.

[0017] Air intake passage 12 is provided with an air cleaner 16 for filtering dust and the like in intake air, and an air f...

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Abstract

The invention provides an engine control device and method. The required throttle downstream pressure is calculated from the accelerator pedal opening and the engine speed, and the ratio of the required throttle downstream pressure to the throttle upstream pressure (atmospheric pressure) is calculated as the value of the required pressure ratio. Then, the degree of opening at which the throttle front-rear pressure ratio is the smaller of the upper limit pressure ratio and the required pressure ratio (slow change required pressure ratio) set in purge control or torque drop control at the time of gear shift is calculated as the target degree of opening of the throttle.

Description

technical field [0001] The present invention relates to an engine control device and method. Background technique [0002] In the vehicle-mounted engine, the opening degree of the throttle valve (throttle valve opening degree) is controlled to adjust the amount of air flowing into the cylinder (in-cylinder air amount) for each combustion. For example, the engine control device described in Japanese Patent Application Laid-Open No. 2006-118373 obtains the required value of the pressure of the intake air after passing through the throttle valve (hereinafter referred to as throttle valve downstream pressure), that is, the required throttle valve downstream pressure, based on the accelerator pedal opening degree. The throttle opening is controlled by determining the target opening according to the required downstream pressure of the throttle. [0003] As a system mounted on a vehicle, there is a vapor treatment system that releases and treats fuel vapor in a fuel tank into inta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/00
CPCF02D41/0002F02D41/0032F02D2200/04F02D2200/602
Inventor 鳄部昌博
Owner TOYOTA JIDOSHA KK
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