30results about How to "Change speed ratio" patented technology

When there is no malfunction in either drive shaft rotational speed detection portion (36) or rotating shaft rotational speed detection portion (44), control of internal combustion engine (22), the power split device (30, MGl), the electric motor (MG2), and the shifting portion (60) is performed while speed ratio in shifting portion (60) is changed and an intermittent operation of internal combustion engine (22) is performed so that a drive power required for drive shaft (32a) is output to shaft (32a). When a malfunction occurs in drive shaft rotational speed detection portion (36) or / and rotating shaft rotational speed detection portion (44), the control is performed while at least one of change in speed ratio, intermittent operation, and output of drive power required for shaft (32a) toshaft (32a) is limited so that a drive power that approximates required drive power as closely as possible is output to drive shaft (32a).

A control device is disclosed which can obtain increased fuel economy performance depending on a kind of fuel in a vehicle having an internal combustion engine and an electric motor when the kind of fuel supplied to the internal combustion engine is altered. A determining vehicle speed (V1) and determining output torque (T1), representing a boundary value with which a step-variable control region and a continuously variable control region of a shifting mechanism (10) are demarcated, are altered such that the higher the mixing ratio of ethanol, the lower will be the determining vehicle speed (V1) and determining output torque (T1). Therefore, the determination is made whether to operate a first electric motor (M1) depending on the mixing ratio of ethanol, making it possible to obtain increased fuel economy performance in line with the mixing ratio of ethanol.

The invention relates to a gear manufacturing method in which, in a first step, a scraper gear (4) driven in rotation by a tool shaft (2) is used on a wheel blank (1) driven in rotation by a workpiece shaft (5) machining of gear teeth (6), where the axis of the workpiece axis (5) and the axis of the tool axis (2) form an intersection angle (α) and the feed is carried out in the direction of extension of the tooth flank, and wherein, in a second step, At least some teeth of the gear teeth (6) are machined with a tooth machining tool (7). A combination tool is used, wherein the tooth processing tool (7) and the scraping gear (4) are fixedly connected to each other. Between these two steps, the combined tool (3) remains connected to the tool shaft (2) and the wheel blank (1) to the workpiece shaft (5). Only the relative position of the tool axis (2) relative to the workpiece axis (5) and the rotational speed ratio of the two axes (2, 5) are changed between these two steps.

The invention relates to a chuck type stepless speed changing mechanism which comprises a driving belt pulley and a driven belt pulley. Each belt pulley comprises a rotary shaft, a rear mounting base end cover, a front mounting base end cover, spiral discs and chuck plates, each rear mounting base end cover is arranged at one end of the corresponding rotary shaft, and each front mounting base end cover is arranged at the other end of the corresponding rotary shaft. The chuck type stepless speed changing mechanism is characterized in that the spiral discs are arranged on the rear mounting base end covers, positioning tooth spaces which can be meshed with spiral tooth spaces of the spiral discs are arranged on the inner side surfaces of the chuck plates, belt wheels are arranged at the tail ends of the chuck plates, a plurality of belt clamp grooves are spliced with one another to form each belt wheel and are arranged around the axis of the corresponding rotary shaft, and the chuck plates are mounted on plate grooves of the front mounting base end covers, are fixed by the aid of fixing grooves and only can move along the radius directions of the belt wheels. The chuck type stepless speed changing mechanism has the advantages that only the radiuses of wheel discs of the two belt pulleys need to be adjusted, so that a speed regulating ratio of the mechanism can be changed, and speeds can be regulated under the condition that the belt pulleys are not changed; the chuck type stepless speed changing mechanism is flexible in regulating range, and speed regulating tasks under different working conditions can be implemented.

The present invention provides a variable speed pulley which can cause smooth change of separation distance of two pulley pieces and a bicycle driving device with the same. The variable speed pulley (10) is provided with the following components: a cylindrical hub (11) connected with a rotating a rotating shaft, two pulley sheets (12,13), two torque cams (14,15), and two force applying devices (20,21). The two pulley sheets are respectively equipped on the outer peripheral part of the hub. A V groove for keeping a wheel belt with a V-shaped section is formed between two opposite surfaces of the pulley sheets. Two torque cams are respectively set on the two cam sheets. Each torque cam is composed of two torque cam sheets (16,17(18,19)) which can movably fasten in a spiral direction and are respectively fixed on the hub and the pulley sheets (12,13). The force applying devices are respectively provided on the two pulley sheets (12,13) and apply force to the pulley sheets (12,13) in a direction of separating the two pulley sheets.