Mazda Motor Corporation

Denso Corporation

Yusuke Oda

Junsou Sasaki

Tomomi Watanabe

Yoshitaka Wada

Naoki Mine

Naohiro Yamaguchi

Yuya Honda

Seiji Hisada

Takuya Yamada

Yuichiro Tanaka

Atsushi Suzuki

Korin Hata

Kazuya Rokuta

An engine is provided, which includes a combustion chamber defined by a crown surface of a piston, an inner wall surface of a cylinder in which the piston is slidably accommodated, and a pentroof-type ceiling surface formed in a cylinder head and formed with an intake port and an exhaust port. The crown surface includes an exhaust-side bottom part, an intake-side bottom part, an exhaust-side sloped surface rising toward a center part of the crown surface from the exhaust-side bottom part, an intake-side sloped surface rising toward the center part from the intake-side bottom part, and a flat surface provided continuously between upper ends of the exhaust-side and intake-side sloped surfaces, and extending perpendicularly to a cylinder axial direction in the center part of the crown surface. A surface area of the flat surface is larger than a surface area of the exhaust-side sloped surface.

Engine with combustion chamber

An engine system is provided, which includes an engine, a swirl control valve, and a controller. The engine includes a cylinder, a piston, and a fuel injection valve provided incliningly with respect to an axial direction of the piston and configured to directly inject fuel into the cylinder. The swirl control valve is provided inside an intake passage and generates a swirl flow inside the cylinder at least when the valve closes. When an engine load is below a given threshold, the controller controls the swirl control valve to close, and controls the fuel injection valve to inject fuel during an intake stroke. While the engine load is below the threshold, at a fixed engine speed, the controller controls to advance a fuel injection timing when the engine load is at a first load, compared with at a second load higher than the first load.

Engine system

An engine system is provided, which includes an engine, a swirl control valve, an EGR passage, an EGR gas adjusting mechanism, and a controller. The engine includes a cylinder, a piston, and a fuel injection valve. The swirl control valve is provided inside an intake passage and generates a swirl flow inside the cylinder when it closes. When an engine load is at or below a given threshold, the controller controls the swirl control valve to close. While the engine load is the threshold or below, the controller controls the EGR gas adjusting mechanism such that, at a fixed engine speed, an increase rate of an EGR gas amount with respect to an increase in the engine load is lower in a first load range than in a second load range, the first load range being on a higher load side of the second load range and including the threshold.

An intake system of an engine supplies gas at least containing fresh air to each cylinder. The system includes an EGR passage that communicates with an internal space of a downstream intake passage and introduces some EGR gas into the downstream intake passage. The EGR passage includes a projected section in a substantially polygonal or cylindrical shape that is projected to the internal space of the downstream intake passage. The projected section is formed in such a shape that a projection length Hin an outer circumferential surface on an upstream side is longer than a projection length Hin an outer circumferential surface on a downstream side.

Engine intake system

The present disclosure provides a vehicular input device including: a capacitance sensor mounted to a vehicle providing a plurality of first conductors lined up in a vehicular front-back direction; and a control unit for estimating the separation distance between the capacitance sensor and a driver's finger based on the amount of an electrical charge in a part of the plurality of first conductors arranged at the back side of a vehicle and also estimating the front-back position of the driver's finger on the capacitance sensor based on the difference of an electrical charge respectively stored in each of the plurality of first conductors.

Vehicular input device

A fuel control system of an engine is provided which controls, by using a tumble flow, a behavior of fuel directly injected into a combustion chamber formed inside a cylinder of the engine. The fuel control system includes a fuel injector for directly injecting the fuel into the combustion chamber, a tumble flow generator for generating the tumble flow within the combustion chamber, and a fuel injector controlling module for causing the fuel injector to inject the fuel at a first injection timing and then inject a smaller amount of fuel than an amount injected at the first injection timing, in a direction opposing a positive direction of the tumble flow at a second injection timing, the first injection timing designed to be in an intake stroke of the cylinder, the second injection timing designed to be in a latter half of the compression stroke of the cylinder.

Fuel control system of engine

The present disclosure provides a vehicular input device, which is arranged in a vehicle having a meter hood protruding toward a driving seat from an instrument panel and surrounding a meter, for detecting an operation of a driver based on an input screen image displayed on a display device arranged on the instrument panel at a side of the meter hood. The vehicular input device includes: a detection unit that is arranged at a side surface of the meter hood and is arranged between the display device and the driving seat; and a display control unit that changes a display mode of the display device in response to an output of the detection unit.

Growing community of inventors

Aki-gun, Japan

Yusuke Oda