Mazda Motor Corporation

Akinobu Aoki

Shinya Kamada

Tatsuhiko Iwasaki

Koichi Yamamoto

Takamichi Teraoka

Tomoo Sawazaki

Yasunori Kanda

Hiroshi Shinozuka

Takeyoshi Kawa

Kazushi Kurokawa

Naotaka Hirami

Masakazu Hombo

Kenji Sawa

Mitsuo Hitomi

Kenji Kashiyama

Tomohiro Koguchi

Masaaki Sato

Yasushi Inoue

Shigeki Nakatani

Noriyoshi Okii

Nobuhiro Fujii

Atsushi Hisano

Fumie Kitakaze

Disclosed is an arrangement structure for a sensor to be mounted to an engine of a vehicle, wherein the engine is arranged in an engine compartmentof the vehicle in a posture allowing a crankshaftof the engine to be oriented in a widthwise direction of the vehicle. The arrangement structure comprises a driveshaftarranged along a vehicle-rearward lateral surface of the enginefacing in a rearward direction of the vehicle, to rotatably drive a front wheel, and a flange sectionprovided as a joining section between two members () constituting the engine, to protrude in the rearward direction of the vehicle and at a height position below that of the driveshaft, wherein the sensoris mounted to the vehicle-rearward lateral surface of the engineat a height position located above the flange sectionand in overlapping relation with the driveshaftwhen viewed from a rear side of the vehicle. The arrangement structure of the present invention is capable of more reliably protecting the sensor mounted to the engine against foreign objects, such as water and a pebble, to adequately maintain performance of the sensor on a long-term basis.

Arrangement structure for sensor to be mounted to engine of vehicle

There are provided a radiator passage, a thermostat to open and close the radiator passage according to an engine temperature, a heater passage, a flow adjusting device to adjust a flow amount of the coolant that flows in the water jacket according to the engine temperature at an engine start. The flow adjusting device is configured so as to adjust the flow amount of the coolant flowing in the water jacket to be a normal amount when the engine temperature is in an extremely-cold condition, to be zero or smaller than the normal amount when the engine is in a mild-cold condition, and to be the normal amount when the engine is in a warm condition. The heater passage is in opened sate at least when the engine is in the extremely-cold condition.

Cooling device of engine

A control system for an automatic transmission having at least a friction coupling element which is coupled with a hydraulic pressure increasing by way of a leveled transitional pressure has an accumulator which discharge a high level of pressure accumulated therein into the friction coupling element during a gear shift under the condition where the line pressure is low.

Control system for automatic transmission

A control system for an automatic transmission having friction coupling elements, at least one of which is locked in 3rd and 4th gears and unlocked in 1st and 2nd gears, includes a first shift valve shiftable between 3rd and 4th gears, and second shift valve shiftable between in 2nd gear and 1st gear in which engine brake available, and a solenoid valve providing control pressure which is selectively directed to these shift valves and cause them to shift so as to lock or unlock the friction coupling elements.

Automatic transmission control system

A control system for an automatic transmission having a transmission gear mechanism and a plurality of friction coupling elements which are selectively locked and unlocked with hydraulic oil to change power transmission paths to place the automatic transmission into desired available gears, a first one of the friction coupling elements having a locking pressure chamber and an unlocking pressure chamber and being locked when operating oil is supplied into only the locking pressure chamber and unlocking when operating oil is coincidentally supplied into the locking pressure chamber and the unlocking pressure chamber, and a second one of the friction coupling elements having a locking/unlocking pressure chamber in communication, with the unlocking pressure chamber of the first friction coupling element and being locked only when operation oil is supplied into the locking/unlocking pressure chamber. The control system includes a transition level control for controlling a pressure level of transitional pressure of operating oil increasing in pressure level while being supplied to the locking/unlocking pressure chamber of the second friction coupling element during a first specified gear shift with a first friction coupling element and the second friction coupling element are simultaneously unlocked and locked, respectively, and decreasing while being discharged from the locking/unlocking pressure chamber of the second friction coupling element during a second specific gear shift wherein the first friction coupling element and the second friction coupling element are simultaneously locked and unlocked, respectively, and a transitional duration control for controlling a duration time of the transitional pressure during any one of the first and second specific gear shifts.

A hydraulic control system for an automatic transmission having at least a forward clutch which is unlocked in a fourth gear and locked in other forward gears and a lock-up clutch for coupling input and output elements of a torque converter together is equipped with a pressure control valve for controlling operating pressure for the forward clutch, a lock-up control valve for connecting and disconnecting the first valve from the lock-up clutch, a pressure line through which control source pressure is introduced into the forward clutch while the first valve is in communication with the lock-up clutch, and a shift valve for discharging the control source pressure from the pressure line.

Forward clutch and lockup clutch control in an automatic transmission

A control system for an automatic transmission having at least a friction coupling element which is coupled with a hydraulic pressure increasing by way of a leveled transitional pressure has an accumulator which discharge a high level of pressure accumulated therein into the fiction coupling element during a gear shift under the condition where the line pressure is low.

An engine cylinder block includes lower and upper cylinder block portions which are fastened together by bearing cap fastening bolts and cylinder block fastening bolts. The engine cylinder block is provided with a baffle plate, for separating a crankcase from an oil pan. The baffle plate is fastened to the engine cylinder block by the cylinder block fastening bolts. Bearing cap fastening bolts are arranged in a row parallel to an axis of rotation of the crankshaft at each side of a row of bearing caps. The cylinder block fastening bolts, each of which is located between adjoining bearing caps, are arranged in a row parallel to the axis of rotation of the crankshaft on each side of the row of bearing caps.

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Higashihiroshima, Japan

Akinobu Aoki