CONTROL DEVICE OF MULTI-CYLINDER INTERNAL COMBUSTION ENGINE

摘要

The invention relates to a control device of a multi-cylinder internal combustion engine. The control device starts executing an ignition engine start control to restart the engine operation when a predetermined engine restart request is generated, a last signal output from a crank angel sensor corresponds to the compression TDC and a signal is output from the sensor before a time elapsing from the output of the last signal reaches a predetermined time. The control device starts executing a starter engine start control when the engine restart request is generated, the last signal output from the sensor corresponds to the compression TDC and no signal is output from the sensor before a time elapsing from the output of the last signal reaches the predetermined time. The control device sets the predetermined time on the basis of a last engine speed acquired on the basis of the last signal and a signal output from the sensor immediately before the last signal is output such that the predetermined time set when the last engine speed corresponds to a first engine speed, is longer than the predetermined time set when the last engine speed corresponds to a second engine speed larger than the first engine speed.

主权项

1. A control device of a multi-cylinder internal combustion engine comprising:
cylinder bores; pistons housed in the respective cylinder bores, the respective pistons and the respective cylinder bores forming combustion chambers; fuel injectors for injecting fuel directly into the respective combustion chambers; ignition devices each including a spark plug; a crank angle sensor for outputting a signal every predetermined crank angle; a crank shaft connected to the pistons; and a starter motor for rotating the crank shaft; the control device comprising a control section programmed to control operations of the fuel injectors, the ignition devices and the starter motor and acquire a speed of the engine as an engine speed on the basis of the signal output from the crank angle sensor, wherein the control section is programmed: to start executing an engine stop control for causing the fuel injectors to stop injecting fuel to stop an operation of the engine when a predetermined engine stop condition is satisfied; to start executing an ignition engine start control for causing the fuel injector to inject fuel into the combustion chamber, a stroke of which corresponding to the combustion stroke, and causing the ignition device to ignite the fuel to restart the operation of the engine when a predetermined engine restart request is generated after the execution of the engine stop control is started, a last signal, which is lastly output from the crank angle sensor before the predetermined engine restart request is generated, corresponds to a signal corresponding to the compression TDC of any of the combustion chambers and a signal is output from the crank angle sensor before a time elapsing from the output of the last signal from the crank angle sensor reaches a predetermined time; to start executing a starter engine start control for causing the fuel injectors to inject fuel and causing the ignition devices to ignite the fuel while causing the starter motor to rotate the crank shaft to restart the operation of the engine when the engine restart request is generated after the execution of the engine stop control is started, the last signal corresponds to a signal corresponding to the compression TDC of any of the combustion chambers and no signal is output from the crank angle sensor before a time elapsing from the output of the last signal from the crank angle sensor reaches the predetermined time; and to set the predetermined time on the basis of a last engine speed acquired on the basis of the last signal and a signal output from the crank angle sensor immediately before the last signal is output from the crank angle sensor such that the predetermined time set when the last engine speed corresponds to a first engine speed, is longer than the predetermined time set when the last engine speed corresponds to a second engine speed larger than the first engine speed.