Toyota Jidosha Kabushiki Kaisha

Aisin Takaoka Co., Ltd.

Junji Watanabe

Akira Nakawatase

Kentaro Mushiga

Taketo Nagasaki

Hitoshi Uda

Tsukasa Nagayama

Akihiro Hosono

A vehicle includes a chain tensioner that serves as an oil damper using oil supplied from an oil pump. The vehicle includes a controller that controls a traveling mode of the vehicle in a BEV mode or a non-BEV mode. When shifting the traveling mode from the BEV mode to the non-BEV mode, the controller executes a high-pressure process for controlling the oil pump such that a supply pressure of oil supplied to the chain tensioner becomes higher when a duration of the BEV mode is greater than or equal to a specified time than when the BEV mode duration is less than the specified time.

Controller for vehicle

An air introduction hole having an aperture area smaller than that of an oil inlet is formed above the oil inlet, and therefore, when the oil level of oil accumulated in an oil pan inclines during traveling, air is sucked in through the air introduction hole, thereby restraining a decrease in hydraulic pressure of the oil. Further, the air introduction hole is formed behind the oil inlet in the vehicle front-rear direction in a vehicle. Accordingly, during heavy load traveling such as hill-climbing traveling, the air introduction hole sinks in the oil, thereby restraining the air from being sucked in through the air introduction hole. Accordingly, no air is sucked into an oil strainer, thereby making it possible to obtain high hydraulic pressure during heavy load traveling.

Vehicle oil supply mechanism

In an exhaust gas-cooling pipe element provided between an exhaust port of an internal combustion engine and an exhaust branch pipe, a center axis of an exhaust introduction opening that is connected to the exhaust port and a center axis of an exhaust discharge opening that is connected to the exhaust branch pipe are placed out of alignment with each other.

Exhaust gas-cooling pipe element and internal combustion engine exhaust system

High pressure regions (H toH) and low pressure regions (L toL) are created based on the exhaust gas flow at curves in an EGR pipe (), thereby enabling the exhaust gas pressure at inlets (to) of gas introduction passages (to) to be adjusted. Accordingly, regardless of the number of cylinders or whether the lengths of the flow paths of the EGR pipe () are the same, the exhaust pressure at the inlets (to) of the gas introduction passages (to) can be appropriately adjusted so any difference in pressure of exhaust gas introduced into branch pipes (to) can be reduced. In this way, the EGR rates of the cylinders can be made closer or the same such that stable combustion can be achieved, thus enabling stable engine operation to be maintained. The EGR pipe () is arranged weaving closely between the branch pipes (to) so space efficiency can be improved and a sufficient amount of exhaust gas can be introduced evenly into the cylinders.

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Toyota, Japan

Junji Watanabe