Patent application number | Description | Published |
20090091284 | MOTOR CONTROL APPARATUS - A P-range side delimiting position of a movable range of a range change mechanism is learned by rotating a motor to a corresponding rotational position, which corresponds to the P-range side delimiting position. A climb correction amount is set for a learning value of the P-range side delimiting position to correct the learning value of the P-range side delimiting position in view of presence of a relatively small angle of rotation of the motor beyond the corresponding rotational position, which corresponds to the P-range side delimiting position. The climb correction amount is set according to motor temperature information, which is one of a temperature of the motor and a temperature that relates to the temperature of the motor. | 04-09-2009 |
20090120222 | SHIFT RANGE CHANGE SYSTEM - A motor needs to provide a first torque at the time of releasing a shift range from a parking range and needs to provide a second torque smaller than the first torque at the time of placing the shift range into the parking range. Also, the motor needs to provide a third torque smaller than the second torque at the time of changing the shift range from one non-parking range to another non-parking range and needs to provide a fourth torque smaller than the third torque at the time of executing the parking range wall abutment learning. When the parking range wall abutment learning is executed from the parking range, a motor control apparatus controls the torque to the third or fourth torque. When the parking range wall abutment learning is executed from any non-parking range, the motor control apparatus controls the torque to the first or second torque. | 05-14-2009 |
20090193923 | Motor control apparatus - In an automatic transmission position control by a motor, it is determined whether the present instant belongs to a starting period, that is, the present instant is immediately after resetting of a control unit or application of power to it. If it is the starting period, an actual shift position that is detected from an output of an output shaft sensor for detecting a rotation position of a motor is set as an instructed shift position. With this measure, even if the control unit is reset for a certain reason while the vehicle is running, the instructed shift position is not changed in association with the resetting. This prevents trouble that the shift position is switched contrary to the intention of the driver, whereby the reliability of a position switching control can be increased. | 08-06-2009 |
20090292431 | CONTROL APPARATUS FOR SHIFT RANGE CHANGEOVER DEVICE - A control apparatus for a shift range changeover device determines temporary abnormality, when a detection output of a rotation position of a motor continues to be abnormal for a first abnormality determination period. The control apparatus further determines persistent abnormality and performs predetermined failsafe processing, when the detection output further continues to be abnormal for a second abnormality period following the first abnormality period. If the temporary abnormality is determined within a feedback control permission period, motor feedback control is prohibited to control the shift range to the neutral range. If the temporary abnormality is determined after the feedback control permission period, the same control operation as before the temporary abnormality is performed. | 11-26-2009 |
20100049419 | Control Apparatus for Vehicle - A target throttle opening degree computing device of a control apparatus computes a target throttle opening degree of a throttle valve and includes a phase lead compensator. A filter filters the target throttle opening degree to provide an ultimate target throttle opening degree, which is used to drive a drive motor to adjust an opening degree of the throttle valve. | 02-25-2010 |
20110068730 | Motor control apparatus - In an automatic transmission position control by a motor, it is determined whether the present instant belongs to a starting period, that is, the present instant is immediately after resetting of a control unit or application of power to it. If it is the starting period, an actual shift position that is detected from an output of an output shaft sensor for detecting a rotation position of a motor is set as an instructed shift position. With this measure, even if the control unit is reset for a certain reason while the vehicle is running, the instructed shift position is not changed in association with the resetting. This prevents trouble that the shift position is switched contrary to the intention of the driver, whereby the reliability of a position switching control can be increased. | 03-24-2011 |
20110175563 | MOTOR CONTROLLING DEVICE - A motor controlling device includes an encoder to output pulse signals with a predetermined angle interval as a rotor of a motor is rotated. An energized phase of the motor is sequentially switched by detecting a rotation position of the rotor based on a value of counting the signals. An initial drive controlling portion executes an initial drive to switch the energized phase with a predetermined pattern after the device is activated so as to learn a relationship among the count value, the rotation position and the energized phase. An initial drive prohibiting portion prohibits the execution of the initial drive until a predetermined time is elapsed after the initial drive is finished. | 07-21-2011 |
20130270471 | HYDRAULIC PRESSURE CONTROLLER - A hydraulic pressure controller is used to control output pressure of a solenoid valve in an oil-hydraulic circuit of a transmission of a vehicle. The hydraulic pressure controller includes an operation value setting section and a correction section. The operation value setting section sets a duty cycle of an operation signal based on a target exciting current and an actual exciting current of the solenoid valve. The operation signal is inputted to a driver circuit for driving the solenoid valve. The correction section corrects the duty cycle, the target exciting current, or the actual exciting current by using a filter for eliminating or damping a resonant frequency component of a vibration model of the output pressure. | 10-17-2013 |
Patent application number | Description | Published |
20080210033 | SHIFT CONTROL SYSTEM, SHIFT CONTROL METHOD, AND SHIFT SWITCHING DEVICE - A shift control system rotates an actuator to cause a wall of a detent plate to contact a roller of a detent spring, and detects the position of contact so as to detect the position of the wall of the detent plate. This wall position is set as a reference position of the actuator. Accordingly, the rotation of the actuator can appropriately be controlled even if an encoder which can only detect relative positional information is employed, and thus the shift range can appropriately be switched. | 09-04-2008 |
20080234918 | KNOCKING STATE DETERMINATION DEVICE - An engine ECU executes a program including the steps of: calculating a correlation coefficient K based on the result of comparing a vibration waveform of an engine and a knock waveform model stored previously; calculating a magnitude value LOG(V) from the magnitude V detected based on a signal transmitted from a knock sensor; creating frequency distribution of magnitude values LOG(V) by using magnitude values LOG(V) in an ignition cycle in which the correlation coefficient K larger than a threshold K( | 09-25-2008 |
20080264150 | INTERNAL COMBUSTION ENGINE KNOCK DETERMINATION DEVICE - An engine ECU executes a program including the steps of: detecting a vibration corresponding to a first radial resonance mode by using a band-pass filter, from vibrations sensed by an in-cylinder pressure sensor provided at an upper central portion of the cylinder; calculating knock intensity N based on a result of comparison between the detected waveform and a knock waveform model prepared in advance as a vibration waveform when knocking occurs; determining that knocking occurred when the knock intensity N is larger than a predetermined reference value; and determining that knocking has not occurred when the knock intensity N is not larger than the predetermined reference value. | 10-30-2008 |
20090062064 | SHIFT CONTROL APPARATUS - A shift control apparatus is provided with a shift intention detecting device that electrically detects a shift intention of a driver; a shift driving device electrically controlled based on the shift intention; a shift mechanism; a first position information detecting device that detects, without contact, position information of the mechanical displacement of the shift mechanism; a shift position determining device that determines the shift position based on the position information; a second position information detecting device that detects the position information in a different way than the first position information detecting device does; a malfunction determining device that determines whether the position information detected by the first position information detecting device is erroneous; and a switching device that switches from control based on the first position information detecting device to control based on the second position information detecting device when it has been determined that the position information detected by the first position information detecting device is erroneous. | 03-05-2009 |
20090091866 | SHIFT SWITCHING DEVICE AND SHIFT SWITCHING METHOD - A shift-by-wire shift switching device and shift switching method that switch a shift range of an automatic transmission using an electric motor. The shift switching device includes a controller that determines whether a fault has occurred in a current supply line of each phase of the electric motor on a phase-by-phase basis, executes an open-loop control of the electric motor using only the phases in which it has been determined that a fault has not occurred, and determines whether a fault has occurred in the current supply line by detecting an activation state of the electric motor when the open-loop control of the electric motor is executed. Therefore, it is possible to determine whether a fault in the motor is a short-circuit fault or a break fault, without addition of a part such as a short-circuit detection sensor. | 04-09-2009 |