Denso Corporation

Fumihiko Nakane

Fuminori Suzuki

Hiromitsu Nagata

Yuuta Mizuno

Megumi Ohira

A load drive controlling device includes a dulling controller, a dulling adjuster, and a Proportional Integral (PI) controller. The dulling adjuster sets a first electric current value for a dulling adjustment operation according to a change trend of a target electric current value in an inductive load. The dulling adjuster performs the dulling adjustment operation on the first electric current and limits a dulled value based on a guard value. The PI controller performs a PI control based on a deviation between the dulled value and an actual value of the electric current. The dulling controller sets the first electric current value and the guard value according to a change trend of the target electric current value. In such a configuration, the load drive controlling device improves an electric current response while preventing an over-accumulation of an integration value.

Load drive controlling device

An electronic control apparatus that controls actuation of an inductive load includes: a current detector that detect current flowing through the inductive load and outputs a current detection signal in an analog signal; an analog-digital converter that takes in the current detection signal at a fetch timing, and converts the current detection signal into a current detection value; and a controller that calculates a current arithmetic value by executing arithmetic processing for the current detection value, and controls the current based on the current arithmetic value. The controller obtains a sample data value of the current arithmetic value for each of a plurality of fetch timings. The controller calculates a deflection between an ideal value of the current arithmetic value and the sample data value of the current arithmetic value, and learns the fetch timing, causing the deflection with the ideal value of the current arithmetic value to be minimized.

Electronic control apparatus

A load drive control device is provided, which includes a pulse generator for generating pulse signals with a duty ratio to drive an inductive load, a feedback setting section for setting the duty ratio for feedback, a detection setting section for setting the duty ratio for detection of a natural vibration frequency of the inductive load, a natural vibration frequency setting section for setting the natural vibration frequency of the inductive load based on an actual current value detected at setting the duty ratio for detection, and a selection section for selecting the feedback setting section as a duty ratio setting section at a normal time and for selecting the detection setting section as the duty ratio setting section when a condition for detecting the natural vibration frequency is satisfied.

Load drive control device

Reliably detecting malfunction of an abnormality-monitoring circuit during operation of a processing unit. An electronic control unit provided with a CPU level-inverts and outputs an actuating signal during each iteration of a base routine. An abnormality-monitoring circuit clocks a fall interval of the actuating signal as charging voltage of a gradually discharged capacitor, and outputs a reset signal to the CPU when this charging voltage falls to a defined value. When a check-starting condition is fulfilled, the CPU inhibits a subsequent level inversion of the actuating signal until a predetermined time elapses after a prior level inversion. When the signal inhibition is canceled, when the charging voltage VC of the capacitor is not within a reference range (VL-VH), the CPU determines the abnormality-monitoring circuit to have malfunctioned.

Growing community of inventors

Nishio, Japan

Fumihiko Nakane