Abstract: A hydraulic control apparatus includes two oil flow control valves (30, 32) each provided with a supply control portion (36, 38, 52, 54) for controlling an oil supply from a pressurized oil source, and a discharge control portion (40, 42, 56, 58) for controlling connection with a discharge passage. One of those oil flow control valves supplies/discharges oil to/from one of hydraulic chambers (22, 24) that are oppositely formed in a hydraulic servo mechanism. An operation direction of the hydraulic servo mechanism is performed by operating one of the oil flow control valves. The other operation direction of the hydraulic servo mechansim is performed by operating the other oil flow control valve.

Abstract: An engine system includes an engine, continuously variable transmission and a controller. The engine has an engine shaft and plural cylinders. A number of activated cylinders among the plural cylinders is variable. The continuously variable transmission is configured to transmit a rotation of the engine shaft to wheels of a vehicle at a transmission ratio which is continuously variable. The controller is configured to control the engine to change the number of activated cylinders keeping an engine power generated by the engine to be substantially constant.

Abstract: A joint structure connects a diverging branch pipe to a fuel rail for an internal combustion engine. The fuel rail is stainless steel or steel with rust prevention processing on at least the inner face. The diverging branch pipe is a double pipe with inner and outer pipes. The inner pipe has excellent rust preventing ability with respect to fuel on its inner face in comparison with the outer face of the outer pipe. The inner and outer pipes are connected by a nut for fastening through a joint fitting. A connecting seal portion of the diverging branch pipe and the joint fitting has rust preventing ability equal to that of the inner circumferential face of the diverging branch pipe. An entire liquid contact portion, including a seal face of the diverging branch pipe with respect to the fuel is covered with the inner pipe.

Abstract: A controller determines a target gear ratio from an accelerator opening and a vehicle speed. The controller determines the stroke of a trunnion on the basis of the difference between present inclination and a target inclination, thereby to control stroke by a hydraulic control valve. The stroke is corrected according to input/output disc pushing force.

Abstract: A fuel pressure pulsation suppressing system of a fuel piping system for a gasoline engine having a plurality of cylinders disposed in a straight, V-shape or horizontal opposed shape with delivery pipes for distributing fuel to the cylinders of return-less type without a return circuit to a fuel tank, wherein the cross section of at least one of communication pipes forming the delivery pipes forms a flexible absorbing face, an orifice portion for damping pressure pulse wave caused by fuel injection is installed near a connection part between at least one delivery pipe and a supply pipe or a connection pipe, and the cross sectional area of the flow passage of the orifice should desirably be 0.2 times the sectional area of the flow passage of the connection pipe or the supply pipe or below.

Abstract: In order to control slip amount of a disengagement side engagement device at the time of a gear shift operation, a target value Nr for rotational speed of an input shaft of an automatic transmission is calculated inside an input shaft speed target value calculating block. Slip control of the disengagement side engagement device is then carried out by controlling engine torque using an engine torque control amount obtained from a engine torque control amount estimation block and the clutch slip amount compensation value calculating section to cause rotation speed Nt of the input shaft to follow the target value Nr. In this way, responsiveness and precision of slip control of the disengagement side engagement device at the time of gear shift operation are improved, and it is possible to improve gear shift shock and to carry out a gear shift operation in a short period of time.

Abstract: An engine system includes an engine, continuously variable transmission and a controller. The engine has an engine shaft and plural cylinders. A number of activated cylinders among the plural cylinders is variable. The continuously variable transmission is configured to transmit a rotation of the engine shaft to wheels of a vehicle at a transmission ratio which is continuously variable. The controller is configured to control the engine to change the number of activated cylinders keeping an engine power generated by the engine to be substantially constant.

Abstract: The load element state detecting portion 72 detects the completion of the filling of the hydraulic oil into the clutch 62 and the working limit of the accumulator 64 on the basis of the displacement of the spool valve element 42. That is, since the completion of the filling of the hydraulic oil into the clutch and the working limit of the accumulator 64 are directly detected, so that the completion of the filling of the hydraulic oil into the clutch 62 and the working limit of the accumulator 64 can be detected with high precision regardless of differences among products and the time-lapse variation. Furthermore, they can be detected without equipping any special device to the hydraulic control circuit, and thus there is an advantage that the device construction is simple.

Abstract: A belt clamping pressure setting device includes: a belt clamping pressure setting unit that sets a belt clamping pressure of a continuously variable transmission that includes an input-side pulley, an output-side pulley, and a belt running between the input-side pulley and the out-side pulley; an input revolution detection sensor that detects a number of input revolutions of the input-side pulley; an output revolution detection sensor that detects a number of output revolutions of the output-side pulley; an input torque detection unit that detects an input torque to the input-side pulley; a reference clamping pressure computing unit that computes a reference clamping pressure, based on the number of input revolutions detected by the input revolution detection sensor, the number of output revolutions detected by the output revolution detection sensor, and the input torque detected by the input torque detection unit; and a belt clamping pressure computing unit that computes the belt clamping pressure to be set

Abstract: When changing gear, engagement side clutch coupling force of an automatic transmission (32) is controlled in response to an engagement side clutch coupling force control amount set in advance in an engagement side clutch coupling force control amount storage section (36). A disengagement side clutch coupling force control amount calculating block (40) has a physical model of the automatic transmission (32) internally. This disengagement side clutch coupling force control amount calculating block (40) then calculates disengagement side clutch coupling force control amount from a transmission input torque estimation value estimated by a transmission input torque estimation block (34), a running resistance estimation value from a running resistance estimation block (38) and engagement side clutch coupling force control amount using the physical model, and controls the automatic transmission (32) using the calculated disengagement side clutch coupling force control amount.

Abstract: A control apparatus and method are provided for controlling a torque of an engine coupled to an input shaft of an automatic transmission during a shift by that automatic transmission. In that control, torque-down control by which the engine torque is decreased by a predetermined amount is performed, a torque-restore control starting point at which time torque-restore control is to be started is determined during the torque-down control, and the torque-restore control so as to gradually restore the engine torque to a value before the torque-down control was performed is started at the torque-restore control starting point. The torque-restore control starting point is determined according to a dynamic model which simulates the behavior of the automatic transmission over time from the start of the torque-down control, and so that a rotational speed of the input shaft of the automatic transmission at a target point substantially matches a target speed.

Abstract: When changing gear, engagement side clutch coupling force of an automatic transmission (32) is controlled in response to an engagement side clutch coupling force control amount set in advance in an engagement side clutch coupling force control amount storage section (36). A disengagement side clutch coupling force control amount calculating block (40) has a physical model of the automatic transmission (32) internally. This disengagement side clutch coupling force control amount calculating block (40) then calculates disengagement side clutch coupling force control amount from a transmission input torque estimation value estimated by a transmission input torque estimation block (34), a running resistance estimation value from a running resistance estimation block (38) and engagement side clutch coupling force control amount using the physical model, and controls the automatic transmission (32) using the calculated disengagement side clutch coupling force control amount.

Abstract: In order to control slip amount of a disengagement side engagement device at the time of a gear shift operation, a target value Nr for rotational speed of an input shaft of an automatic transmission is calculated inside an input shaft speed target value calculating block. Slip control of the disengagement side engagement device is then carried out by controlling engine torque using an engine torque control amount obtained from a engine torque control amount estimation block and the clutch slip amount compensation value calculating section to cause rotation speed Nt of the input shaft to follow the target value Nr. In this way, responsiveness and precision of slip control of the disengagement side engagement device at the time of gear shift operation are improved, and it is possible to improve gear shift shock and to carry out a gear shift operation in a short period of time.

Abstract: A thrust ratio calculation section 50 calculates a thrust ratio based on driving pulley thrust from a driving pulley thrust calculation section 44 and following pulley thrust from a following pulley thrust calculation section 48. A thrust ratio state of change identifying section 52 detects a peak of a thrust ratio caused by changing of the following pulley thrust, based on the thrust ratio and the following pulley thrust. The following pulley thrust is maintained such that the thrust ratio remains at the peak. This enables appropriate control of the pulley thrust.

Abstract: A surveying system which comprises a light source section for emitting laser beam, a rotational portion for rotating the laser beam from the light source in horizontal direction, a light source driving section for driving the light source unit, a survey instrument main unit having a light receiving unit for receiving the reflected laser beam, and a reflecting object for reflecting the laser beam irradiated from the survey instrument main unit main unit of the survey instrument.

Abstract: A rotating laser apparatus having a reciprocating laser scanning system which facilitates visual recognition of a laser beam on an object to be measured by raising an effective energy level on the object. In the apparatus the laser beam is rotated by a rotation device. The reciprocating laser scanning system includes reflection members for reflecting the laser beam, a laser beam detector for detecting a return laser beam reflected from the reflection members, and a microcomputer for controlling a rotation of the rotation device in accordance with the output of the laser beam detector.

Abstract: An object reflector detecting apparatus for identifying an object reflector by emitting a light from a polarized light source toward the object reflector and then detecting a reflected light from the object reflector characterized in that the light emitted from said polarized light source is a polarized light of which direction of polarization is specially defined, the polarized lights between said reflected light and said emitted light are different in the direction of polarization, and said object reflector detecting apparatus is adaped to detect only a component of the direction of polarization from said object reflector.

Abstract: A shift control apparatus in a vehicle automatic transmission, where down-shift is carried out from a high velocity step to a low- velocity step.A flatness-aiming control has a common targetted change rate with respect to a turbine rotational speed in the inertia phase, and aims a hydraulic command value for the engaging side element and a hydraulic command value for the releasing side element at flatness in the inertia phase with the passage of time.An initial value setting control sets an engaging side initial value and a releasing side initial value at the beginning of the inertia phase in response to the turbine torque and the turbine rotational speed.

Abstract: In a shift control apparatus in a vehicle automatic transmission, up-shift is carried out from a low velocity step to a high velocity step. When a rotational blow is generated, a controlling device controls the releasing side element of frictional engaging elements in such a target that the releasing side element of frictional engaging elements slips on the mating member with the engaging side element of frictional engaging elements moving for engagement.

Abstract: The present invention provides an object reflector detection system, in which laser beam is emitted toward an object reflector and reflection light beam is received to detect presence or absence and position of the object reflector, whereby there are provided a laser beam emitter and a reflection light beam detector, and further a laser beam emitter for emitting polarized irradiation light beam toward the object reflector, and a reflection light beam detector for detecting polarized reflection light beam from the object reflector, and the reflection light beam detector having a first detection means for detecting polarized reflection light beam from the object reflector, a second detection means for detecting polarized light beam different from the polarized reflection light beam from the object reflector and a reflection light beam detection circuit for identifying the object reflector based on comparison between output of the first detection means and output of the second detection means.