Variable Valve Timing Control

Abstract

A variable valve timing control device (A), including a phase detection part (T), drives an electromagnetic solenoid (Va) to make a reel (55) when a detection signal detected by the phase detection part (T) is obtained The phase control section (15) is set to one of the phase control area (W2, W4) and the lock area (W1, W5), and the phase control area ( W2, W4) and the boundary storage part (16) of the boundary current value (La, Lb) of the boundary between the locking area (W1, W5), and a characteristic calculation part ( 18), the boundary current value (La, Lb) supports the phase control area (W2, W4) and the lock area (W1 , W5), the characteristic calculation unit (18) stores the boundary current value (La, Lb) to the boundary storage unit (16).

Description

technical field [0001] The present disclosure generally relates to a variable valve timing control device. Background technique [0002] The variable valve timing control device disclosed in JP2016-180318A (hereinafter referred to as Patent Reference 1) includes a solenoid valve and a lock mechanism that control the relative rotational phases of the inner rotor and the outer rotor. The variable valve timing control device disclosed in Patent Reference 1 knows the boundary between the phase control region and the lock region of the operation region of the spool of the solenoid valve, and performs control based on the knowledge. [0003] That is, the variable valve timing control device disclosed in Patent Reference 1 includes a sensor section that detects the relative rotational phase, and changes the voltage supplied to the electromagnetic solenoid in the case of knowing the boundary between the phase control area and the lock area. The current of the tube is stored, and th...

AI Technical Summary

Problems solved by technology

[0006] In the case where the variable valve timing control device repeats the same procedure at the time of learning, it takes time to learn, for example, in the case where the variable valve timing control device learns in a state where the engine (internal combustion engine) of the vehicle is operating, since the engine Unstable rotation may cause user discomfort

[0007] Since it takes man-hours to know each variable valve timing control device that needs to be known according to the knowledge disclosed in Patent Reference 1, there are problems of time-consuming and increased production costs

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