Toyota Jidosha Kabushiki Kaisha

Masanori Matsubara

Katsumi Kono

Yasuhiro Tanaka

Takaaki Tokura

Takeshi Yasuda

Tomoyuki Koike

Tomohiro Kondo

A controller executes a dither control that cyclically increases and decreases an exciting current in a linear solenoid valve so as to vibrate a spool of the linear solenoid valve. A vibration cycle of the spool obtained through the dither control is referred to a dither cycle. The dither control includes a first dither control that vibrates the spool in a first dither cycle and a second dither control that vibrates the spool in a second dither cycle that is shorter than the first dither cycle. The controller executes the first dither control and the second dither control when an oil temperature of the hydraulic oil is between a first oil temperature and a second oil temperature that is higher than the first oil temperature.

Controller and control method for linear solenoid valve

A controller for a linear solenoid valve is configured to: calculate an average value of an exciting current within a period including a natural number multiple of the dither cycle as an average current value; execute a feedback control on a control value of the pulse width modulation signal such that a target value of the exciting current and the average current value match; and calculate a dither correction amount by multiplying a ratio between the control value of the pulse width modulation signal obtained by the feedback control and the average current value by a dither current value that is a current value corresponding to the dither correction amount and calculating the dither correction amount such that an increase in the exciting current due to the dither correction amount is canceled out by a decrease in the exciting current due to the dither correction amount within one dither cycle.

A battery () includes a terminal fixing portion () projecting outwardly from a lid body (), and an outer cover member () covering the terminal fixing portion (). The terminal fixing portion () includes a hole () into which an electrode terminal () is inserted. The outer cover member () includes a cylindrical portion () (deformation restricting portion) covering an outer peripheral surface () of the terminal fixing portion () and restrict deformation of the outer peripheral surface () of the terminal fixing portion (), and a pressure application portion () that compresses against a top end portion () of the terminal fixing portion () and causes the terminal fixing portion () to deform.

Growing community of inventors

Kasugai, Japan

Masanori Matsubara