Abstract: A vehicle seat includes a lock-to-neutral-position mechanism that locks a seat cushion at a neutral position, and an immediate lock mechanism that locks the seat cushion immediately at a current position when locking is required. A steering sensor senses a steering angle and a steering angular velocity. The immediate lock mechanism performs the locking when the steering angle is large, whereas the lock-to-neutral-position mechanism performs the locking when the steering velocity is high. When the steering wheel is at the neutral position, the locking by the immediate lock mechanism is released and the locking is switched over to the lock-to-neutral-position mechanism that is in a lock ready state.

Abstract: A vehicle seat includes a seat cushion configured to support the buttocks of an occupant, a seat back configured to support the back of the occupant, an elastic force adjustment unit configured to adjust elastic force of a lumbar spine support of the seat back configured to support the lumbar spine of the occupant, in a longitudinal direction, and a controller configured to operate the elastic force adjustment unit. The controller is configured to make the elastic force larger in the case where oscillation of the vehicle is large, than that in the case where oscillation of the vehicle is small.

Abstract: A locking block is fixed with respect to a seat cushion. A locking pin which can advance and retract relative to the locking block is provided on a main frame side. A V groove shape receptacle is formed on the locking block. When the locking pin is advanced into the receptacle portion, the locking pin is guided by a receiving inclined surface of the receptacle portion forming the V-shape groove, and advances to a bottom of the receptacle portion. With this process, the locking block moves in a rotational direction B, and when the locking pin engages the bottom, the seat cushion is fixed.

Abstract: A transmission includes a fork mechanism in which a plurality of fork rods to which a plurality of shift forks are connected are each attached to a pedestal so as to be moveable in an axial direction. An assembly guide portion is disposed on the pedestal and a guide pin is erected on a clutch housing. As a result, even in cases where an input shaft and a main shaft, on which driving and driven gears and synchro devices are assembled, are assembled on the clutch housing in a state that the driving and driven gears are engaged and, thereafter the fork mechanism is assembled on this clutch housing, the assembly of the fork mechanism on the clutch housing can be easily performed.

Abstract: A cooling pipe for an internal combustion engine includes with a resin-made water outlet for forming a circulation path for circulating a coolant for cooling an engine body, and an attachment part for retaining a water temperature sensor for sensing the temperature of the coolant flowing through the water outlet, the attachment part being attached to the water outlet, a portion of the attachment part being in contact with the engine body, and the attachment part formed from a material whereby heat from the engine body is transmitted.

Abstract: A transmission includes a fork mechanism in which a plurality of fork rods to which a plurality of shift forks are connected are each attached to a pedestal so as to be moveable in an axial direction. An assembly guide portion is disposed on the pedestal and a guide pin is erected on a clutch housing. As a result, even in cases where an input shaft and a main shaft, on which driving and driven gears and synchro devices are assembled, are assembled on the clutch housing in a state that the driving and driven gears are engaged and, thereafter the fork mechanism is assembled on this clutch housing, the assembly of the fork mechanism on the clutch housing can be easily performed.

Abstract: A cooling pipe for an internal combustion engine includes with a resin-made water outlet for forming a circulation path for circulating a coolant for cooling an engine body, and an attachment part for retaining a water temperature sensor for sensing the temperature of the coolant flowing through the water outlet, the attachment part being attached to the water outlet, a portion of the attachment part being in contact with the engine body, and the attachment part formed from a material whereby heat from the engine body is transmitted.

Abstract: An upper oil pan of an engine includes a flange with an oil pan abutment surface that is fixedly coupled to a flange formed on a cylinder block. The oil pan abutment surface comprises a flat portion that is substantially parallel to a cylinder block abutment surface of the cylinder block, a slanted portion that is slanted with respect to the flat portion, and a vertical wall portion connecting the flat portion and the slanted portion. The vertical wall portion is formed substantially perpendicular to the flat portion. The cylinder block and the upper oil pan are fixedly coupled together via an interposed liquid gasket. Thus, the seal structure in which the liquid gasket is adequately cured is provided, and sufficient sealing properties can be obtained with a small amount of material used.

Abstract: The fuel pump driving structure includes a camshaft and a pump cam member. The camshaft is rotatably supported at an end by a cylinder head. The pump cam member has a fitting hole into which the end of the camshaft is press fitted, and is operatively coupled to a high-pressure fuel pump. The pump cam member includes a pump cam section and a first contact section. The pump cam section has a first lift portion operating the high-pressure fuel pump, and a base circular portion that does not operate the high-pressure fuel pump. The first contact section is in a position offset from a position of the first lift portion with respect to a circumferential direction and contacting a portion of the camshaft in an axial direction at a position radially outward of an external circumferential surface of the one end of the camshaft.

Abstract: A transmission shift fork engages with a coupling sleeve of a synchronizer and shifting the coupling sleeve. The transmission shift fork includes a first part, second part, and at least one fin. The first part is arranged to movably mount the transmission shift fork in a shift fork movement direction. The second part includes a coupling sleeve facing surface, an outwardly facing surface, and a pair of shift-direction facing surfaces. The coupling sleeve facing surface includes at least one coupling sleeve engagement part arranged to engage with an engaging groove formed on an external circumferential surface of the coupling sleeve. The outwardly facing surface includes an oil catch disposed in a position with respect to the coupling sleeve engagement part such that the oil catch captures lubricating oil and supplies to the coupling sleeve engagement part. The fin projects from inside an oil receiving recess defined by the oil catch.

Abstract: The fuel pump driving structure includes a camshaft and a pump cam member. The camshaft is rotatably supported at an end by a cylinder head. The pump cam member has a fitting hole into which the end of the camshaft is press fitted, and is operatively coupled to a high-pressure fuel pump. The pump cam member includes a pump cam section and a first contact section. The pump cam section has a first lift portion operating the high-pressure fuel pump, and a base circular portion that does not operate the high-pressure fuel pump. The first contact section is in a position offset from a position of the first lift portion with respect to a circumferential direction and contacting a portion of the camshaft in an axial direction at a position radially outward of an external circumferential surface of the one end of the camshaft.

Abstract: A transmission shift fork engages with a coupling sleeve of a synchronizer and shifting the coupling sleeve. The transmission shift fork includes a first part, second part, and at least one fin. The first part is arranged to movably mount the transmission shift fork in a shift fork movement direction. The second part includes a coupling sleeve facing surface, an outwardly facing surface, and a pair of shift-direction facing surfaces. The coupling sleeve facing surface includes at least one coupling sleeve engagement part arranged to engage with an engaging groove formed on an external circumferential surface of the coupling sleeve. The outwardly facing surface includes an oil catch disposed in a position with respect to the coupling sleeve engagement part such that the oil catch captures lubricating oil and supplies to the coupling sleeve engagement part. The fin projects from inside an oil receiving recess defined by the oil catch.

Abstract: A cooling water passage structure of internal combustion engines is provided which can contribute to a scale-down of the external form of the engine and also can prevent deformation of the cylinder bores. The cooling water passage structure comprises a water jacket for the flow of cooling water provided on the peripheries of a plurality of cylinder bores; and a lateral suction passage 9a, 9b integrally formed with a side wall of a cylinder block 2 having bolt holes formed for fastening a cylinder head 3. The lateral suction passage runs through by the cylinder bores at a height in the vicinity of the water jacket bottom and is arranged on the outside of, and perpendicular to the bolt holes. On the rear surface of the cylinder head 3 is mounted a water passage block 15 and on the front end part of the cylinder block 2 is provided a water pump housing 10.

Abstract: A cooling system for an internal combustion engine in which bubbles are not transferred to the water pump, and thereby the efficiency of the water pump is maintained. The interior of a water outlet mounted on a cylinder head is divided by a partition wall to form a feeding chamber to feed the coolant introduced from the cylinder head to a first path provided with a radiator, and a receiving chamber forming a second path to receive the coolant returned from a heater core. Between the receiving chamber and the feeding chamber is a channel making one or both chambers communicate with the other. As a result, bubbles in the coolant running through the second path are introduced into the feeding chamber through the channel and removed from the radiator.

Abstract: Techniques are disclosed of constructing a computer-based musculoskeletal model physically representing bones and muscles of a human body. These techniques include: defining as a first pivot-axis-direction for a selected joint, a direction of an axis about which selected bone models are pivoted relative to each other in response to expansion/contraction of a selected muscle model; defining as a second pivot-axis-direction, a direction of an axis about which the selected bone models are pivoted relative to each other in response to a specified motion imparted to the human body; and redefining the first pivot-axis-direction, as a function of a relative angle of the first pivot-axis-direction to the second pivot-axis-direction.

Abstract: In a flywheel 2, a central part of a thin plate portion 3 having a flywheel mass provided on an outer peripheral side of the plate portion is joined to an end surface of a crankshaft 1 through a plurality of bolts 7 disposed annularly at intervals. Within a contact zone of a substantially polygon defined by linking each center of the bolts 7 with straight lines excluding the bearing surfaces of the bolts 7, the plate portion 3 has a non-contacting part S2 in a followed fashion set not to contact with the end surface of the crankshaft 1, and the area of the non-contacting part S2 is set to be 40% to 75% of the whole area of the contact zone.

Abstract: An oil pan for internal combustion engine which is lightweight and has improved stiffness and vibration suppression, achieved by reducing the number of components. The oil pan includes an upper portion to be attached to the bottom portion of a cylinder block directly or through an adaptor plate and a lower portion provided on the bottom of the upper portion, with a baffle plate formed integrally downward of the upper portion. An oil supplying means which sucks the oil accumulated in the lower portion and supplies the sucked oil to portions of the internal combustion engine is provided.

Abstract: An oil level gauge guide structure including an oil level gauge for measuring engine oil of a vehicle. An oil level gauge is held in an oil level gauge guide. A clip is provided having a first end section held to a resinous part fixed to an engine main body, and a second end section held to the oil level gauge guide. The oil level gauge is provided with two linear stoppers contactable with the second end section of the clip, and an O-ring fixed on an end section of the oil level gauge guide. The end section of the oil level gauge guide is inserted into the communication hole in a first direction, while the first end section of the clip is pressed to the resinous part in a second direction. The first and second directions are parallel with each other.

Abstract: The oil pan includes an oil introducing portion that has an oil introducing plate. The oil introducing plate has an insertion hole for receiving a sucking portion of an oil strainer. The oil introducing plate extends from the periphery of the insertion hole toward a side wall of the oil pan. The oil returned from the first oil return passage is introduced to flow along the oil introducing plate via an oil falling hole formed in a baffle plate that is positioned at the bottom of a crank case of the internal combustion engine. The oil introducing portion further includes a plurality of inclined wall portions mounted on a bottom portion of the oil pan in the vicinity of the side wall of the oil pan in order to support the oil introducing plate. Opening portions are formed between the inclined wall portions and the bottom portion of the oil pan. The oil introducing plate of the oil introducing portion is located just below the oil falling hole formed in said baffle plate.

Abstract: In an intake manifold 3 having a plurality of branch tubes 4, 4 arranged over the top surface of a cylinder head 1 in a state were a flange 7 provided at downstream-side ends of the branch tubes 4, 4 is fixed to a lateral surface of the cylinder head 1, and having a plenum chamber portion 5 provided at upstream-side ends of the branch tubes 4, 4, a retainer 10 is provided on the lateral surface of the cylinder head 1 and projecting outward therefrom, and an engaging recess 9 is provided in the lower portion of the flange 7 in order to engage with the retainer 10. Further, in the plenum chamber portion 5 of the intake manifold 3, flat portions 8, 8 are formed and are permitted to be provisionally placed on and fixed in position relative to the top surface of a rocker cover 2.