Toyota Jidosha Kabushiki Kaisha

Aisin Seiki Kabushiki Kaisha

Jun Tokumitsu

Hideki Ohashi

Ryo Kanda

Shogo Tanaka

Masaaki Oishi

Katsuyuki Sano

Kohtaroh Okimura

Ken Ogue

Tomoyuki Nakamura

Hirokazu Shiozaki

Masakazu Ohashi

Takayuki Tachi

Ikuhide Iyoda

Kazuhiko Kubota

Masao Ikeya

A vehicle-height control system including a tank, a compressor, an actuator, and a valve between the tank and the compressor. The valve is closed to a state of a pressure medium supplier to the compressor-pressure supply state when a tank pressure has reached a threshold in a tank-pressure supply state in which the tank pressure is supplied to the actuator. In the compressor-pressure supply state, the tank pressure is kept at the threshold, and a pressure in the actuator is greater than the tank pressure. The threshold makes it difficult for a pressure differential in the valve to become greater than a valve-opening pressure differential, making it difficult for the valve to be opened in the compressor-pressure supply state. This system enables good supply of a pressure medium from the compressor to the actuator, avoiding a longer time for vehicle height control and achieving a shorter compressor operation time.

Vehicle-height control system

A vehicle height control system includes a fluid feeder and a vehicle height control unit. The vehicle height control unit includes a communication control unit. In a first communication state, a high-pressure source and a common passage are made to communicate with each other via the first passage and the second passage. In a second communication state, the first passage is shut off and the high-pressure source and the common passage are made to communicate with each other via the second passage. The communication control unit selects one from among the plurality of communication states based on at least one of a content of a start condition, a target vehicle height of a height increasing control and a number of wheels to be controlled in the height increasing control, when the start condition of the height increasing control is satisfied.

Vehicle height control system

A vehicle-height control system includes: a fluid supply and discharge device including a compressor device and a tank storing fluid pressurized by the compressor device; a vehicle-height control actuator corresponding to a wheel and connected to the fluid supply and discharge device; a vehicle height controller that controls a vehicle height for the wheel by controlling the fluid supply and discharge device to control supply and discharge of fluid to and from the vehicle-height control actuator; a tank pressure controller that controls a tank pressure; and a fluid supply controller that supplies the fluid to a low pressure portion by controlling the fluid supply and discharge device at start and/or termination of at least one of control executed by the vehicle height controller and control executed by the tank pressure controller. The low pressure portion is at least a portion of the fluid supply and discharge device.

Vehicle-height control system and pressure source device

A vehicle-height control system is configured to control a vehicle height for a wheel. The vehicle-height control system includes: a vehicle-height control actuator provided so as to correspond to the wheel; a pressure-medium supply and discharge device configured to supply and discharge a pressure medium to and from the vehicle-height control actuator; and a vehicle height controller configured to control the vehicle height for the wheel by controlling the pressure-medium supply and discharge device based on an inside temperature and an outside-air temperature to control at least one of supply and discharge of the pressure medium to and from the vehicle-height control actuator. The inside temperature is a temperature in the vehicle-height control system.

A vehicle-height control system includes: a fluid supply and discharge device including a compressor configured to suck fluid, and a tank configured to supply the fluid; an actuator-side passage connected to the fluid supply and discharge device; a vehicle-height control actuator provided for a wheel and connected to the actuator-side passage via a vehicle-height control valve; and a vehicle height controller configured to control a vehicle height for the wheel by controlling the fluid supply and discharge device and the vehicle-height control valve to control supply and discharge of the fluid in the vehicle-height control actuator. The vehicle height controller includes a start controller configured to open the vehicle-height control valve after establishing communication between the actuator-side passage and at least one of the tank and the compressor in a state in which the vehicle-height control valve is closed at a start of control of the vehicle height.

A vehicle-height adjustment system includes: a vehicle-height adjustment actuator provided so as to correspond to a wheel; and a pressure-medium supply and discharge device configured to supply and discharge a pressure medium to and from the vehicle-height adjustment actuator. The pressure-medium supply and discharge device includes a tank configured to store the pressure medium. The vehicle-height adjustment system includes a tank-pressure controller configured to control a tank pressure based on at least one of a vehicle height for the wheel and an inside temperature. The tank pressure is a pressure of the pressure medium stored in the tank, and the inside temperature is a temperature in the vehicle-height adjustment system.

Vehicle-height adjustment system

A vehicle height adjustment system includes: a vehicle height adjustment actuator provided for each wheel of a vehicle; a pressure medium intake and exhaust device configured to supply and exhaust a pressure medium to and from the vehicle height adjustment actuator; and a vehicle height adjustment unit including a computer, the vehicle height adjustment unit configured to: adjust a vehicle height by controlling the pressure medium intake and exhaust device, the vehicle height being a distance between the wheel and a vehicle body; adjust the vehicle height when a get-in estimation condition is satisfied; and limit a number of times the vehicle height is adjusted within a set period to a number of times smaller than a set number of times.

Vehicle height adjustment system

An air source device includes: a tank; a compressor; an intake valve; and an ECU configured to acquire an intake amount, which is an amount of air sucked from an outside and supplied to the tank by the compressor, based on an increasing amount of a tank pressure, which is a pressure of the air accommodated in the tank, the increasing amount being an increasing amount from a time point when the intake valve is estimated to be changed from a closed state to an opened state.

Air source device

A suspension system includes: suspensions that respectively include vehicle height control actuators; a pressure medium supply-discharge device; and a vehicle height controller configured to control the pressure medium supply-discharge device to control vehicle height, wherein a magnitude of resistance that is generated during a change in the vehicle height at one or more of the suspensions is larger than a magnitude of resistance at another one or more of the suspensions, and the vehicle height controller is configured to execute vehicle height control for the wheel that corresponds to the one or more of the suspensions with the large magnitude of the resistance prior to vehicle height control for the wheel that corresponds to the other one or more of the suspensions with the small magnitude of the resistance.

Suspension system

An air suspension system includes a controller that controls opening/closing of normally-closed electromagnetic switching valves constituting a control valve, a first supply/discharge switching valve, a second supply/discharge switching valve, a first tank switching valve, and a second tank switching valve. The controller controls opening/closing of the electromagnetic switching valves in an order of first control, second control, and third control. In the first control, the control valve is opened. In the second control, the first supply/discharge switching valve and the second supply/discharge switching valve are opened in an opened state of the control valve. In the third control, the control valve, the first supply/discharge switching valve, and the second supply/discharge switching valve are closed.

Air suspension system

A vehicle-height adjusting system includes: vehicle-height adjusting actuators each for adjusting a vehicle height for a corresponding one of wheels; a pressure medium supplier for supplying a pressure medium from a tank to each of the vehicle-height adjusting actuators; and a vehicle height adjuster for adjusting the vehicle height for each wheel. The vehicle-height adjusting actuators include a left vehicle-height adjusting actuator and a right vehicle-height adjusting actuator. The vehicle height adjuster includes a supply amount controller configured to control the pressure medium supplier such that substantially the same amount of the pressure medium is to be supplied from the tank to the left vehicle-height adjusting actuator and the right vehicle-height adjusting actuator, when at least one of the wheels is in contact with an uneven road surface.

Vehicle-height adjusting system

A data backup apparatus includes a semiconductor memory having a plurality of areas, each area storing a value of variables. A writing unit writes a value to a plural number of areas of the memory one by one, the plural number being at least four and even. A reading unit reads the values from the plural number of areas of the memory. A coincidence determining unit determines whether more than half of values read from the plural number of areas of the memory are the same as each other. An assigning unit determines a coincidence value when it has been determined that more than half of the read values are the same, so that the coincidence value is assigned to each variable.

Growing community of inventors

Toyota, Japan

Jun Tokumitsu