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engine control system

A technology of control system and engine, applied in the direction of engine control, combustion engine, engine components, etc., can solve the problems of restarting the engine in a short time, and it is difficult to shorten the restart time of the engine.

Inactive Publication Date: 2016-12-28
SUZUKI MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as disclosed in Patent Publication No. 2007-064161, the cylinder identification process is reset each time the engine restart process is started, which may make it difficult to shorten the time required to restart the engine
[0013] Conversely, correctly updating the rotational position of the crankshaft during engine reversal eliminates the reset cylinder identification process, resulting in a shorter time required to restart the engine

Method used

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no. 1 approach

[0069] The engine control system according to the first embodiment will be described below.

[0070] figure 1 A structural example of the engine control system 1 is schematically shown.

[0071] The engine control system 1 can control an engine installed in a vehicle. For example, in the first embodiment, a three-cylinder internal combustion engine is controlled by the engine control system 1 . Assign the same reference numerals to the three cylinders #1, #2 and #3 respectively, and in figure 1 In , to avoid complexity, only cylinder #1 is shown.

[0072] The engine has a crankshaft 101 connected to a piston by a connecting rod in each cylinder, and the reciprocating stroke of the piston in each cylinder turns the crankshaft 101 . The engine also has a camshaft 102 connected to a crankshaft 101 . For example, for every two revolutions of the crankshaft 101, the camshaft 102 makes one revolution.

[0073] Specifically, the engine utilizes pistons to compress and combust...

no. 2 approach

[0279] An engine control system 1A according to the second embodiment is described below. In order to avoid redundant description, in the following description, the same components between the first and second embodiments denoted by the same reference numerals are omitted or simplified.

[0280] The engine control system 1A according to the second embodiment is configured to prohibit stopping execution of the first abnormality determination process, the second abnormality determination process and the crank angle position check process when the ignition switch is in the OFF state. Operation of the ignition switch by the driver can energize and de-energize the electrical system of the engine. Specifically, when the ignition switch is operated to switch from an on state to an off state, the engine stops and cannot be started. On the other hand, the engine may be started when the ignition switch is switched from the off state to the on state.

[0281] Figure 14 A structural e...

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PUM

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Abstract

In the system, the signal output module generates a pulse according to the rotation of the crankshaft, and outputs a signal with the pulse. The pattern of the pulses shows at least one reference point of the crankshaft as a reference for the position of the at least one cylinder. The reference part detector performs reference part detection processing for detecting at least one reference part of the crankshaft based on a pulse pattern of the signal when the rotation direction of the crankshaft is a predetermined direction. The reversal prediction module predicts whether rotation of the crankshaft in a predetermined direction will reverse. If the reverse rotation prediction module predicts that the rotation of the crankshaft in the predetermined direction will be reversed, the prohibition module prohibits the reference part detector from performing the reference part detection process.

Description

technical field [0001] The present invention relates to a technique for measuring a rotational position of a crankshaft of an internal combustion engine called an engine and controlling the engine based on the measured rotational position of the crankshaft. Background technique [0002] An engine installed in a vehicle is generally equipped with a cylinder in which a mixture of compressed air and injected fuel is ignited by a piston reciprocating according to rotation of a crankshaft of the engine, thereby generating combustion within the cylinder. In order to properly control when fuel is injected into each cylinder and when the air-fuel mixture is ignited within each cylinder, the engine control system needs to identify the position of each cylinder relative to the compression TDC (Top Dead Center, top dead center), that is , the position of the piston in each cylinder. [0003] Japanese Patent Publication No. 4521661 discloses that the position of each cylinder is identi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D45/00
CPCF02D41/009F02N11/0814F02D2041/0095F02D2250/06F02D41/222Y02T10/40F02D45/00
Inventor 前泽慎吾
Owner SUZUKI MOTOR CORP