Controller for idle stop system

Abstract

When a request for re-start of an engine or a request for start occurs during inertial revolution of the engine by fuel cut at the time of request for idle stop, an operation of starting by re-start of fuel injection and an operation of driving the starter overlap, and a problem is likely to occur in wear resistance and durability of a ring gear and a pinion gear. Further, since collision torque becomes large, a collision sound of the ring gear and the pinion gear and a mesh sound which occurs at the instant of connection are likely to occur. The present invention changes a method of starter drive based on a behavior of engine revolution after a request for re-start of the engine or a request for start occurs during inertial revolution of the engine by fuel cut at the time of request for idle stop, and combustion recovery is implemented by an engine combustion recovery function, or an engine state or the like at the time of occurrence of change of mind, in a controller of a vehicle having an idle stop function.

Description

technical field [0001] The present invention relates to a control device for automatically stopping and restarting an engine. Background technique [0002] In order to save energy and protect the environment, it is considered to automatically stop the idle link (idling stop) by cutting off the fuel supply to the engine when the specified conditions for allowing the engine to temporarily stop while the car is running, and it has been implemented in some cars . [0003] In an automobile corresponding to the idling stop, according to the idling stop request generated when the above-mentioned predetermined condition is satisfied, during the engine coasting period from the cutoff of the fuel supply to the engine to the stop of the crankshaft rotation of the engine, a relapse occurs. When there is a request to start the engine (a restart request or a request for change of mind), it is required to restart the engine as quickly as possible. [0004] As a technique to meet this req...

AI Technical Summary

Problems solved by technology

At this time, when the angular acceleration direction of the engine rotation and the angular acceleration direction of the pinion gear are different, the pinion gear (pinion gear) collides with the ring gear on the engine side, and since the collision torque becomes large, there are ring gear and Issues such as pinion wear and reduced durability

In addition, since the collision torque increases, there is a problem that the collision sound of the ring gear and the pinion and the engagement sound generated at the moment of connection become louder.

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