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Engine control system

A control system and engine technology, applied in the direction of engine control, combustion engine, engine components, etc., can solve problems such as the difficulty of shortening the restart time of the engine, and the short time of restarting the engine

Inactive Publication Date: 2014-03-26
SUZUKI MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 a system, a signal output module produces pulses based on rotation of a crankshaft, and outputs a signal having the pulses. A pattern of the pulses shows at least one reference portion of the crankshaft to which the position of at least one cylinder is relative. A reference portion detector performs a reference portion detecting task that detects, based on the pulse pattern of the signal while a rotational direction of the crankshaft is a predetermined direction, the at least one reference portion of the crankshaft. A reverse rotation predicting module predicts whether rotation of the crankshaft in the predetermined direction will be reversed. A disabling module disables the reference portion detector from performing the reference portion detecting task if the reverse rotation predicting module predicts that rotation of the crankshaft in the predetermined direction will be reversed.

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