Patent application number | Description | Published |
20100236502 | VEHICLE COOLING CONTROLLER AND COOLING CONTROL METHOD - A drive component for driving an electric water pump for causing engine coolant to flow is mounted in an engine compartment. When the ignition is off and the temperature of a exhaust heat recovery device is above a temperature, an ECU estimates a peak temperature in the engine compartment after the stop of the engine. When the peak temperature is above a temperature, the ECU stops the engine and drives the electric water pump and an electric fan for cooling the drive component for driving the electric water pump. | 09-23-2010 |
20110148370 | VOLTAGE CONVERSION APPARATUS AND ELECTRICAL LOAD DRIVING APPARATUS - The present invention is related to a voltage conversion apparatus having a first loop circuit and a second loop circuit which share an inductance component, in which a current passes through the first and second loop circuits alternately in accordance with ON/OFF operation of a first switching element provided in the first loop circuit, characterized in that a direction of a magnetic field through the first loop circuit generated at the ON operation of the first switching element in the first loop circuit is the same as a direction of a magnetic field through the second loop circuit generated at the OFF operation of the first switching element in the first loop circuit subsequent to the ON operation. | 06-23-2011 |
20110273014 | VOLTAGE CONVERSION DEVICE AND ELECTRICAL LOAD DRIVING DEVICE - A voltage conversion device includes: first and second loop circuits having a common inductance element. Electric current alternately flows through the first or second loop circuit as a first switching element of the first loop circuit is turned on or off. A magnetic field that is formed when the first switching element is turned on and that penetrates through the first loop circuit and a magnetic field that is formed when the first switching element is turned off after it is turned on and that penetrates through the second loop circuit have the same direction. All elements that constitute the first and second loop circuits are arranged on the same surface of a substrate. The second loop circuit is connected to a second direct-current power source. The first loop circuit is connected to a first direct-current power source. | 11-10-2011 |
20120007530 | NOISE REDUCTION ARRANGEMENT RELATED TO A THREE-PHASE BRUSHLESS MOTOR - An object of the present invention is to effectively reduce noise generated when driving a three-phase brushless motor. A noise reduction arrangement applied to a three-phase brushless motor is disclosed, wherein respective current loops, which are generated when two switching elements Q | 01-12-2012 |
20120105042 | SWITCHING APPARATUS - A switching apparatus is disclosed that includes a first loop circuit configured to include a switching element, an inductive component and a capacitor; and a second loop circuit configured to share the inductive component with the first loop circuit, wherein the capacitor is inserted in series with the inductive component in the first loop, wherein the switching apparatus controls respective currents flowing through the first loop circuit and the second loop circuit in an alternating manner by turning on/off the switching element in order to control the current flowing through the inductive component, and wherein a first magnetic flux generated by the current flowing through the first loop circuit as the switching element is being turned on and a second magnetic flux generated by the current flowing through the second loop circuit as the switching element is being turned off head in the same direction. | 05-03-2012 |
20120119723 | VOLTAGE CONVERSION APPARATUS AND ELECTRICAL LOAD DRIVING APPARATUS - A voltage conversion apparatus is disclosed in which a current passes through first and second loop circuits alternately in accordance with ON/OFF operation of a first switching element provided in the first circuit. The direction of a magnetic field through the first loop circuit formed at the ON operation is the same as a direction of a magnetic field through the second loop circuit formed at the OFF operation. The first loop circuit and the second loop circuit are provided on opposite sides of a printed circuit board, respectively, in such a manner that the first loop circuit and the second loop circuit are opposed to each other. A heat sink is provided on a surface of the printed circuit board. A solid pattern of a metal material is provided on an inner layer of the printed circuit board to be connected to the heat sink via a through hole. | 05-17-2012 |
20130049717 | SWITCHING POWER SUPPLY CIRCUIT AND CONTROL METHOD THEREFOR - A switching power supply circuit includes a PWM drive circuit ( | 02-28-2013 |
20130057244 | DUTY RATIO/VOLTAGE CONVERSION CIRCUIT - A duty ratio/voltage conversion circuit that converts the duty ratio of an input signal into voltage level and outputs the voltage level includes: an input terminal to which the input signal is input; a first CR integrating circuit that integrates the input signal; a load resistor a first end of which is connected to an output point of the first CR integrating circuit, and a second end of which is grounded; and an output terminal connected to the load resistor. The first CR integrating circuit includes a first pathway that has a first resistor, and a second pathway in which a phase inversion portion, a second resistor and a first capacitor are connected in series, and is a parallel circuit in which first and second ends of the first pathway are connected to first and second ends, respectively, of the second pathway. | 03-07-2013 |
Patent application number | Description | Published |
20130255249 | VEHICLE BRAKE DEVICE - A vehicle brake device is provided with a master cylinder, a master piston slidably arranged in the master cylinder, an input piston slidably arranged in the master cylinder to be separated from the master piston and defining a separation chamber, an input piston moving amount detecting section for detecting the moving amount of the input piston, a master piston moving amount calculating section for calculating the moving amount of the master piston based on the moving amount of the input piston, and a contact inferring section for inferring the contact of the input piston with the master piston based on the moving amount of the input piston and the moving amount of the master piston. | 10-03-2013 |
20140250883 | VEHICLE BRAKE SYSTEM - A vehicle brake system includes a cylinder, a master piston including a pressure applying piston and a projection portion, a servo chamber, a contact/separation determining means determining a separated state and a contact state between the input piston and the master piston, a pilot pressure generating device generating a pilot pressure, a servo pressure generating device, a servo pressure measuring device measuring a servo pressure, and a master pressure estimating means estimating a master pressure from the pilot pressure and a first servo ratio, which is a cross-sectional area ratio between a first pilot chamber and a servo pressure generating chamber, in a case of the separated state, and estimating the master pressure based on the servo pressure, the pilot pressure and a second servo ratio, which is a cross-sectional area ratio between a second pilot chamber and the servo pressure generating chamber, in a case of the contact state. | 09-11-2014 |
20140345271 | HYDRAULIC BRAKE SYSTEM - A hydraulic brake system for braking a vehicle, including a master cylinder device having a fluid-flow permission mechanism that permits a flow of a working fluid between an inter-piston chamber and a low-pressure source, wherein, when a pressure of the working fluid to be supplied to a brake device exceeds a set pressure upon advancing in association with an advancing movement of a brake operation member, a closing and opening mechanism for hermetically closing the inter-piston chamber and opening an opposing chamber to the low-pressure source is controlled so as to hermetically close the inter-piston chamber, while, when the pressure of the working fluid becomes lower than a set pressure upon retracting in association with a retracting movement of the brake operation member, the fluid-flow permission mechanism is controlled so as to permit the flow of the working fluid between the inter-piston chamber and the low-pressure source. | 11-27-2014 |
20150015061 | BRAKING DEVICE FOR VEHICLE - In a braking device for a vehicle, an operating characteristics setting portion is provided for setting an operating characteristic which is a relationship between the input electric power to the electro-magnetic valve and a pressure difference between a master cylinder side and a wheel cylinder side with respect to the electro-magnetic valve, based on the input electric power at the time when the accumulator pressure detected by the accumulator pressure detecting portion first falls to a value equal to or less than a threshold value accumulator pressure by changing the input electric power towards an opening side of the electro-magnetic valve in response to a time lapsed after a predetermined value of the pilot pressure has been generated by the pilot pressure generating portion by first closing the electro-magnetic valve thereby to suppress the manufacturing cost. | 01-15-2015 |
20150021976 | HYDRAULIC BRAKE DEVICE FOR VEHICLE - A vehicle hydraulic brake system of the brake-by-wire type includes input piston and a master piston configured to be actuated under hydraulic pressure introduced into a second fluid chamber and mounted in the housing so as to be movable relative to each other through a partition wall and a first fluid chamber. The piston defines therein a communication passage which extends from a fourth fluid chamber to the first fluid chamber and in which a check valve is mounted. When the piston is advanced under hydraulic pressure introduced into the second fluid chamber, the volume of the fourth fluid chamber decreases, while the volume of the first fluid chamber increases. This allows brake fluid in the fourth fluid chamber to be quickly released into the first fluid chamber through the communication passage and through a pipe line in which an electromagnetic on-off valve are mounted. | 01-22-2015 |