Toyota Jidosha Kabushiki Kaisha

Yuki Aratsu

Hiroyuki Ogawa

Seiji Kuwahara

Seiji Masunaga

Takayuki Ando

Akira Hibino

Akira Murakami

Daisuke Tomomatsu

Takahiro Shiina

Hirotsugu Yoshino

Mitsuaki Tomita

Tsubasa Kato

A control device of a lock-up clutch according to the disclosure is mounted on a vehicle including an engine, a transmission, a fluid-type power transmitting device interposed between the engine and the transmission, and the lock-up clutch provided on the fluid-type power transmitting device. The control device includes: a controller configured to slip-engage the lock-up clutch when accelerator opening of the vehicle changes in an accelerating direction, and configured to make a slip-engagement amount larger when a state of the fluid-type power transmitting device when the accelerator opening of the vehicle changes in the accelerating direction is a driven state than the slip-engagement amount when the state of the fluid-type power transmitting device is a driving state.

Control device of lock-up clutch

A control device includes a controller configured to perform control to increase a rotational speed of a power source when a brake is stepped on and accelerator opening becomes a predetermined value or larger while a vehicle stops, and thereafter, when the brake is stepped off, engage a plurality of engaging units to transmit a power, and start the vehicle. The controller includes: a parameter obtaining unit configured to obtain a parameter indicating requested acceleration when the vehicle starts; and a slip control unit configured to perform slip control on at least one of the plurality of engaging units such that difference in rotational speed occurs between frictionally engaging elements and set number of engaging units on which the slip control is performed according to a value of the obtained parameter when the vehicle starts.

Control device of vehicle

A control device for a vehicle is provided. The vehicle includes a transmission and an engine configured to input a torque into the transmission. The transmission has multiple transmission stages and includes a first engagement mechanism and a second engagement mechanism. The control device includes an ECU configured to: (a) control the second engagement mechanism when a second transmission stage is set such that the capacity of torque transmission of the second engagement mechanism is increased and a thrust for separating a first member and a second member of the first engagement mechanism from each other in an axial direction is generated; (b) calculate a decrement in an output torque of the transmission when the capacity of torque transmission of the second engagement mechanism is increased; and (c) increase a torque input into the transmission by the engine based on the decrement in the output torque by controlling the engine.

Control device for vehicle

A stepless transmission includes: a transmission shaft; first to fourth power transmission elements; a plurality of rolling bodies clamped by the first and second power transmission elements disposed in confrontation with each other, and tiltably held by the fourth power transmission element; an axial force generator configured to generate axial force in an axial direction for pressing at least one of the first and second power transmission elements against the rolling bodies; and a transmission device configured to change a gear ratio between an input and output by tilting the rolling bodies. Young's moduli of a contact section and an additional contact section, in contact with the rolling body, of one of the first and second power transmission elements are larger than those of other one of the first and second power transmission elements.

Stepless transmission

A slip control device includes a control unit configured to: calculate a difference value between a target value and a current value or an estimated value of a difference in a rotational speed between an input shaft and an output shaft of a fluid type power transmitting device, or a difference value being a difference between a target value and a current value or an estimated value of a speed of an engine; calculate an inclination of torque capacity of the fluid type power transmitting device with respect to an input parameter at a current value of the input parameter having correlative relationship with the torque capacity of the fluid type power transmitting device; calculate torque capacity of a lock-up clutch by multiplying the inclination by the difference value; and control a slip amount of the lock-up clutch by using the calculated torque capacity.

Slip control device of lock-up clutch

A continuously variable transmission includes: a transmission shaft; first to fourth power transmission elements that have a first rotation center axis coaxial with the transmission shaft; a plurality of rolling members that has a second rotation center axis; a transmission device configured to change a gear ratio between an input side and an output side by tilting each of the rolling members; a rotary shaft that is coupled with one of the first and second power transmission elements, and is provided with a cylindrical section; an annular member that is coupled with the rotary shaft, and configured to form an annular oil reservoir formed of lubricating oil; and a scraping up section configured to scrape up the lubricating oil by rotating in the circumferential direction.

Continuously variable transmission

A continuously variable transmission includes a shaft, first and second rotary members, a sun roller, a carrier, planetary balls, a gear shifter for changing a gear ratio between input and output by tilting each of the planetary balls, a casing for accommodating these elements, and a lubricating oil supply opening for supplying lubricating oil into the casing. The casing includes a discharge opening for discharging the lubricating oil to the outside of the casing. The discharge opening is provided in a wall of the casing in an axial direction of the shaft and radially outside the lubricating oil supply opening. As seen in the axial direction, the discharge opening is formed either at a position that crosses a contact section between the planetary ball and each of the first and second rotary members or an auxiliary contact section, or radially outside the contact section or the auxiliary contact section.

Provided with first and second rotational members, a sun roller, a plurality of planetary balls sandwiched between the first and second rotational members, a support shaft of each of the planetary balls, a shaft, a carrier, an iris plate and a worm gear for tilting each of the planetary balls, and an input shaft and an output shaft individually fixed to the first and second rotational members, respectively, in which a movable amount of the sun roller relative to the carrier in an axis line direction is set to be smaller than the movable amount of the second rotational member relative to the carrier in the axis line direction when the input shaft is arranged so as to be relatively rotatable on an outer peripheral surface of the output shaft.

A continuously variable transmission includes plural planetary balls, a carrier, a sun roller, an input shaft, an output shaft, and thrust bearings sandwiched between respective holding surfaces of the input shaft and the output shaft, wherein the holding surface at a time of rest is formed such that a space between the holding surface and a race on one side of the thrust bearing becomes wider on an outside in a radial direction than on an inside in the radial direction, and the holding surface at the time of rest is formed such that a space between the holding surface and a race on the other side of the thrust bearing becomes wider on the outside in the radial direction than on the inside in the radial direction.

Growing community of inventors

Susono, Japan

Yuki Aratsu