118results about How to "Increase friction loss" patented technology

Methods and systems are provided to improve engine temperature control. Cylinders scheduled for deactivation may have their exhaust retained in the cylinder by holding an exhaust valve closed on the preceding firing cycle. In this way soot emissions on reactivation are reduced.

The invention discloses a planetary roller screw which comprises a lead screw, a nut, two roller retainers, two elastic inner check rings, two inner gear rings and a plurality of rollers arranged between the lead screw and the nut; the two inner gear rings are respectively fixed at the two end parts of an inner hole of the nut, parallel annular tooth sockets are arranged at the middle part of the inner hole of the nut, the two roller retainers are respectively sleeved in the inner holes of the two inner gear rings and are respectively blocked and located by the two elastic inner check rings embedded in the inner gear rings, retaining holes, whose number is consistent with that of the rollers, are arranged on the roller retainers, parallel teeth embedded with the threads of the lead screw and the annular tooth sockets of the nut are arranged at the middle parts of the rollers, the two end parts of the rollers are plain spindle heads, and the plain spindle heads are respectively inserted in the retaining holes of the two roller retainers. The planetary roller screw has a reasonable structure, convenience for manufacture, high transmission efficiency, large bearing capacity, high movement precision and low manufacturing cost, so that the planetary roller screw can be extensively applied on such apparatuses as numerical control machine frames and harbor machinery, etc.

The reversible hydraulic pressure converter (1) employing tubular valves includes a medium-pressure stage (44) consisting of a medium-pressure cylinder (2) and a double-acting medium-pressure piston (3) the position of which is sent to a control computer of the converter (19) by a piston position sensor (14), the cylinder (2) and the piston (3) forming two medium-pressure chambers (5) that can be placed in communication with a medium-pressure inlet-outlet circuit (15) by at least one tubular valve (12), the converter (1) also including two high-pressure cylinders (9) each cooperating with a high-pressure piston (8) of smaller diameter and defining two high-pressure chambers (11) that can be placed in communication with a high-pressure inlet-outlet circuit (16) by at least one tubular valve (12), each of the various tubular valves (12) cooperating with an independent valve actuator (13).

A single motor transmission shifting mechanism with exactly one electric motor for generating drive motions for selecting, and for generating drive motions for shifting gears of a motor vehicle transmission device, and with a threaded spindle for switching from a mode, in which selection motions can be effectuated, into a mode, in which shifting motions can be effectuated, and with a shifting shaft, which can be moved in axial direction for selecting, and which can be rotated around its longitudinal axis for shifting, wherein all components, transferring the drive load for shifting from the electric motor to the shifting shaft during shifting operation, maintain their axial position relative to the longitudinal axis of the threaded spindle during this shifting operation.

A hybrid system control apparatus is provided in which an intercooler (15) is disposed upstream of the motor cooling radiator (70) in a flow path of the ambient air flowing in an engine compartment, and / or is disposed such that at least a portion of the intercooler and a portion of the motor cooling radiator contact each other. The hybrid system control apparatus includes a warm-up portion (60) that increases temperature of the boost air by controlling a load of the engine in cold start of a hybrid system (1) such that the boost pressure from the forced air induction device is equal to or higher than a target boost pressure.

A system and method to reduce the instantaneous power consumption during heating of a fuel injector is described. The system is capable of heating the fuel injectors of an engine at different times.

In a variable valve actuation system of an internal combustion engine employing a variable valve actuator capable of variably adjusting at least intake valve closure timing depending on engine operating conditions, a processor of a control unit is programmed to phase-advance the intake valve closure timing to a predetermined timing value after a piston top dead center position and before a piston bottom dead center position on intake stroke during at least one of an engine starting period and an engine stopping period. The variable valve actuator includes a biasing device by which the intake valve closure timing is permanently biased toward the predetermined timing value.

The invention relates to a cooler arrangement for a drive train (21) in a motor vehicle (23). Said cooler arrangement comprises a first coolant circuit (3) with a first coolant cooler (7) as well as a second coolant circuit (5) with a second coolant cooler (9). The invention is characterized in that there is a connection between the first coolant circuit (3) and the second coolant circuit (5).

An oil recovery part (20A, 20B) for guiding oil to an inner side of a peripheral wall of a cylinder head (2) is provided at a front wall upper end of the cylinder head (2), the oil leaking from a concave bearing (3a, 3b) that supports a camshaft (8, 9) provided at a forefront end of a cam housing (3).

A single motor transmission shifting mechanism with exactly one electric motor for generating drive motions for selecting, and for generating drive motions for shifting gears of a motor vehicle transmission device, and with a threaded spindle for switching from a mode, in which selection motions can be effectuated, into a mode, in which shifting motions can be effectuated, and with a shifting shaft, which can be moved in axial direction for selecting, and which can be rotated around its longitudinal axis for shifting, wherein all components, transferring the drive load for shifting from the electric motor to the shifting shaft during shifting operation, maintain their axial position relative to the longitudinal axis of the threaded spindle during this shifting operation.

In a gear mechanism that includes a gear in which a tooth trace is twisted at a predetermined angle with respect to an axial direction, a curvature radius along a line of contact at a meshing position where a line of contact does not intersect a pitch circle is formed larger than a curvature radius along a line of contact at a meshing position where a line of contact intersects a pitch circle, on a plane of action of the gear.

An automatic transmission including a double pinion planetary gear unit PG1, two single pinion planetary gear units PG2 and PG3 and six frictional elements (viz., six clutches) C1 to C6 is so constructed as to establish nine forward speeds and one reverse speed by simultaneously putting selected three of the six frictional elements C1 to C6 into their engaged condition. The frictional elements C1 to C6 are of a type including mutually rotatable friction plates that cause production of an oil dragging resistance when the frictional element is under idling condition. With the simultaneously engaged condition of the three frictional elements, each speed is established with a reduced friction loss of the automatic transmission.

In order to provide a combination of a cylinder bore and a piston ring using a cylinder bore spraying technique that can utilize an aluminum alloy cast made by normal die casting, and that has exceptional scuffing resistance and abrasion resistance and low friction loss even in severe sliding conditions with an engine subjected to a high load, an iron-based sprayed film formed on a face of a cylinder bore of an internal combustion engine that slides against a piston ring is combined with a hard carbon film formed on an outer peripheral sliding face of the piston ring, the iron-based sprayed film having an Rpk value in a surface roughness curve of less than 0.20 [mu]m, and the hard carbon film having an Rpk value in a surface roughness curve of less than 0.15 [mu]m.

An oil ring for an internal combustion engine, comprising a metallic annular body (10) to be mounted around a piston (P) reciprocating inside a cylinder (C) of the engine, said annular body (10) having opposite lateral faces (11), an internal face (12) onto which will be seated a resilient expander (M), and an external contact face (13) to be seated against the internal face of the cylinder (C) and having a height (h) that is substantially smaller than the height (H) of the internal face (12). Each lateral face (11) is defined by one or more lateral face portions (11a, 11b), which are designed to reduce the moment of inertia of the annular body (10), giving higher conformability to the latter. Preferentially, but not exclusively, the annular body (10) can be further provided with channels (15, 16), extended along at least part of the ring hight and which are radially spaced back in relation to the external contact face (13).

The invention relates to a shear thickening protective liquid and application thereof, and belongs to the technical field of shear thickening liquids. The shear thickening protective liquid is composed of polyethylene glycol, nano silicon dioxide powder and boron carbide powder; according to the shear thickening protective liquid, under the cooperation of boron carbide particles and silicon dioxide particles, on one hand, friction is increased, and the principle of friction energy absorption between the particles is fully utilized; and on the other hand, the degree of shear failures during impregnation of a fiber fabric can be reduced, and energy absorption of the fiber fabric to shots is increased. The shear thickening protective liquid disclosed by the invention has a better bulletproofeffect in the field of fiber fabric modification, and can be widely applied to the field of different types of protective equipment.

The invention relates to a method for operating a drive device (1) of a motor vehicle, said drive device (1) comprising at least one combustion engine (3) and at least one electric machine (9), as well as a dual clutch transmission (4) which can be functionally connected to the combustion engine (3) and which comprises a first sub-transmission (5), a first clutch (6) being associated therewith, and a second sub-transmission (7), a second clutch (8) and the electric machine (9) being associated therewith. In a purely electrical driving operation, the electric machine (9) is operated in a motorised manner, a driving gear is engaged in the second sub-transmission (7), and both clutches (6, 8) are disengaged. According to the invention, in order to start the combustion engine (3) during the electric driving operation, the second clutch (8) is engaged so as to drive the combustion engine (3) by means of the electric machine (9), a gear is engaged in the first sub-transmission (5), said gear having a lower gear ratio than the engaged driving gear of the second sub-transmission (7), the first clutch (6) is brought into a slip position and the second sub-transmission (7) is subsequently brought into a neutral position, the rotational speed of the electric machine (9) is increased at least to a starting rotational speed for the combustion engine (3) with the slip of the first clutch (6) being adjusted to maintain a forward torque of the motor vehicle, and the combustion engine (3) is started once its starting rotational speed has been reached. In addition, the invention relates to a device for operating a drive device of a motor vehicle.

The invention provides an octahedral guiding elevator. The octahedral guiding elevator comprises a cuboid supporting frame, an elevator car, and a traction mechanism, wherein the cuboid supporting frame is supported by four upright posts; the elevator car is arranged in the supporting frame; the traction mechanism is used for drawing the elevator car to move; the elevator car comprises four side edge angles; mounting seats opposite to the two adjacent side surfaces of the upright posts are arranged at the extending parts on the two adjacent side surfaces of elevator car forming the side edge angles; guide grooves are formed in the mounting seats; guide parts are arranged in the guide grooves; the elevator car is matched with the upright post side surfaces through the guide parts to conduct lifting motion; two guide surfaces matched with the guide part are formed on each upright post; eight guide surfaces are formed on the four upright posts in total. The guide parts and the mounting seats are matched with each other, and the elevator car is guided in all directions to enable the elevator car to move up and down along the upright posts under external driving; an octahedral guiding elevator adopting the structure is an independent elevator product, and is stable and reliable in running, aesthetic in appearance, convenient to mount, and wide in application.

The invention discloses a low-noise cutting ball valve. The low-noise cutting ball valve comprises a valve body and a ball body structure, wherein the ball body structure comprises a ball body, a runner grid plate and a ball body runner; the runner grid plate is arranged in the ball body runner and is X-shaped. Due to the fact that the runner grid plate is arranged in the ball body runner, the friction loss of a fluid is increased by a gradual pressure reducing and multi-grade throttling method, air pockets are reduced or even eliminated, the speed of the fluid flowing through the valve is greatly reduced, and the problem of high noise and strong vibration is solved.

An automatic transmission including three single pinion planetary gearsets and six friction elements, in which an input shaft is always connected to a first sun gear of a first planetary gearset, the output shaft is always connected to a second ring gear of a second planetary gearset, a third sun gear of a third planetary gearset is always kept in a fixed state relative to a transmission case of the automatic transmission, a first ring gear of the first planetary gearset and a third pinion carrier of the third planetary gearset are always connected to each other and constitute a first rotary member, and at least eight forward speeds and one reverse speed are respectively established by simultaneous engagements of three friction elements selected from the six friction elements.

The present invention provides a hydraulic active damping system to damp gears, thereby reducing the occurrence of gear rattle or noise. The active nature of the present invention will allow the drag within the bearing to which the gear mounts to be selectively increased, by pressurizing an enclosed or specialized bearing with fluid during critical events. The pressure within the specialized bearing is subsequently decreased, thereby only increasing the system drag at critical operating conditions. The present invention also provides a method of damping gears by introducing pressurized fluid into a specialized bearing and subsequently reducing the fluid pressure therein.

An apparatus includes a movable temperature sensing member capable of sensing mainly the temperature of high-temperature coolant flowing in from a high-temperature coolant port and driving toward the side of the high-temperature coolant port in dependence upon the sensed temperature; a main valve fitted integrally to the movable temperature sensing member and constructed so as to render a low-temperature coolant port and a mixing compartment openable in conformity to the driving of the movable temperature sensing member toward the side of the high-temperature coolant port, thereby controlling the inflow rate of low-temperature coolant from the low-temperature coolant port to the mixing compartment; and a high-temperature coolant inducing part communicating with the high-temperature coolant port and adapted to regulate the flow of high-temperature coolant from the high-temperature coolant port toward the surround of the movable temperature sensing member and effect outflow thereof to the mixing compartment.

A system and method for controlling electromechanical valves operating in a transmission is presented. According to the method, transmission operation can be improved by heating the valves, at least during some conditions.

A coating composition produces a protective coating to a substrate, which coating has an improved surface smoothness. The coating composition comprises a mixture of at least a first type of particles and a second type of particles that are dispersed in a liquid medium. The particles form a total population of particles having a median ESD in a range from about 1 to about 7 micrometers. The different types of particles have different median ESDs. The first type of particles has a maximum ESD of about 40 micrometers, and the second type of particles has a maximum ESD of about 20 micrometers. A method for producing a coating having an improved surface smoothness comprises applying such a coating composition on a substrate and curing the coating composition to produce a protective coating. The coating may be further densified by a burnishing process or further improved by applying another coating comprising particles having ESDs less than about 4 micrometers.