JP5046069B2 - Lubricating device for toroidal type continuously variable transmission - Google Patents

Description

  The present invention relates to an oil supply device for supplying traction oil to a toroidal continuously variable transmission used as a transmission of, for example, an automobile.

  A toroidal continuously variable transmission has a mechanism that combines multiple power rollers between the traction surfaces of an input disk and an output disk. The input disk rotates by the input from a power source such as an engine. Force is transmitted to the output disk via the power roller. By controlling the inclination angle of the rotating shaft of the power roller and changing the contact position of the peripheral surface of the power roller with respect to the traction surface of the input disk and the output disk, the transmission ratio can be set steplessly. The traction surface of the input and output discs and the peripheral surface of the power roller are pressed against each other by a strong pressing force to transmit power, and an oil film of traction oil supplied from the supply pump is formed on these contact surfaces. ing. However, when the toroidal continuously variable transmission is stopped for a long period of time, the traction oil forming the oil film may gradually fall due to the influence of gravity, resulting in an oil film running out state.

  Therefore, conventionally, a method for supplying traction oil in advance before the operation of the toroidal continuously variable transmission has been proposed. For example, Patent Document 1 describes a method of supplying traction oil from an auxiliary hydraulic power source different from a power source after a predetermined time has elapsed since a preliminary operation for starting a power source such as an engine is detected. Yes.

  Patent Document 2 describes a method of supplying traction oil by an oil delivery means when detecting an operation of an ignition switch before a power source such as an engine is started. The oil delivery means is configured to use, for example, an electric pump, an accumulator that accumulates traction oil, or a cylinder that accumulates traction oil.

JP-A-11-230494 JP 2002-195370 A

However, when the traction oil is supplied after the elapse of a predetermined time after detecting the preliminary operation as in Patent Document 1, the power source is started at an unexpected speed after the detection of the preliminary operation. The supply of traction oil may not be in time.
Further, as in Patent Document 2, when an electric pump or the like is operated when the operation of the ignition switch is detected, when the power source is not started after that, the traction oil is continuously supplied wastefully. There is a risk that the power source such as the on-board battery may be consumed.
The present invention has been made in view of the above circumstances, and is a toroidal-type continuously variable transmission that can reliably supply traction oil before starting a power source and can eliminate unnecessary supply of traction oil as much as possible. An object of the present invention is to provide an oil supply device for a machine.

An oil supply device for a toroidal continuously variable transmission according to claim 1 is a toroidal continuously variable transmission for supplying traction oil to a traction surface of a toroidal continuously variable transmission to which torque is input from a power source. In the fueling device of the machine, a detection means for detecting in advance that the power source is started by a preliminary operation related to the start of the power source, which is an operation associated with the start of the power source, and before the power source is started A supply mechanism capable of supplying traction oil; and when the detection means detects in advance that the power source is started, the supply mechanism is activated, and the power source is started after a certain period of time has elapsed since then. stops the operation of the feed mechanism when that is not, when the power source until elapse the predetermined time is started, the supply when elapsed since then a predetermined time Characterized in that it comprises a control means for stopping the operation of the structure, a.

A fueling device for a toroidal continuously variable transmission according to a second aspect is the invention according to the first aspect , wherein the supply mechanism includes an electric motor as a drive source.

According to the fuel supply apparatus of the toroidal type continuously variable transmission of the present invention, starting the supply of traction oil upon detecting a preliminary operation regarding starting of the power source, And a certain time while the dynamic power source is not started by has elapsed Sometimes, by stopping the supply of traction oil, the traction oil can be reliably supplied before the power source is started, and the wasteful supply of traction oil can be minimized.

1 is a schematic block configuration diagram of an oil supply apparatus according to a first embodiment of the present invention. It is a flowchart for demonstrating the control content of the control means in FIG. It is a flowchart for demonstrating the control content of the control means in the 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
1 and 2 are diagrams for explaining a first embodiment of the present invention.
As shown in FIG. 1, this embodiment is an application example as a fueling device for a toroidal continuously variable transmission 12 for a vehicle that uses an engine 11 as a power source, and an input disk of the toroidal continuously variable transmission 12. Torque is input from the engine 11. The rotation of the input disk is transmitted to the output disk through a plurality of power rollers, and is further output from the output shaft through the output gear. By controlling the inclination angle of the rotating shaft of the power roller and changing the contact position of the peripheral surface of the power roller with respect to the traction surface of the input disk and the output disk, the transmission ratio can be set steplessly. The traction surface of the input and output disks and the peripheral surface of the power roller are pressed against each other by a strong pressing force to transmit power, and an oil film of traction oil supplied from the oil supply device is formed on these contact surfaces. The

The fueling device of this example is provided with detection means 1, control means 2, and supply mechanism 3.
The detection unit 1 is a unit for detecting a preliminary operation related to the start of the engine 11. The preliminary operation is various operations accompanying the start of the engine 11. The detection means 1 includes, for example, a door opening / closing detection signal, an ignition key insertion detection signal, a driver seating detection signal, a brake pedal on signal, a steering operation detection signal, and a starter capable of remote control. The preliminary operation can be detected by a combination of the ON signal of the cell motor. In short, it is only necessary to detect in advance that the engine 11 is started before the engine 11 is actually started.

  The supply mechanism 3 is a mechanism capable of supplying traction oil without depending on the start of the engine 11. As the supply mechanism 3, a mechanism for supplying traction oil using an electric motor as a drive source can be used. In that case, traction oil can be supplied by supplying electric power from the in-vehicle battery to the electric motor and driving the electric pump by the electric motor. Various other mechanisms can be employed as the traction oil supply mechanism 3. For example, a mechanism for supplying traction oil accumulated using an accumulator or a mechanism for supplying traction oil accumulated using a cylinder may be employed.

  The control means 2 controls the supply mechanism 3 when the detection means 1 detects a preliminary operation, and supplies a constant amount of traction oil from the supply mechanism 3 to the toroidal continuously variable transmission 12. FIG. 2 is a flowchart for explaining the control of the supply mechanism 3 by the control means 2.

  The control means 2 first waits for detection of the preliminary operation by the detection means 1 (step S1). When the detection means 1 detects the preliminary operation, the control mechanism 2 immediately activates the supply mechanism 3 to provide the toroidal continuously variable transmission 12. The supply of traction oil to is started (step S2). When a certain amount of traction oil is supplied by the supply mechanism 3, the operation of the supply mechanism 3 is stopped to stop the supply of traction oil (steps S3 and S4). When the supply mechanism 3 is a mechanism using an electric pump, for example, the supply amount of traction oil is based on the supply amount of traction oil per unit time of the electric pump and the drive time of the electric pump. It can be determined whether a certain amount has been reached. The predetermined amount is a necessary and sufficient amount of traction oil to be supplied to the contact surface between the input and output disks of the toroidal type continuously variable transmission 12 and the power roller before the engine 11 is started. An optimum amount can be set in advance according to the type of the continuously variable transmission 12. For example, it is possible to set the amount so that an oil film can be sufficiently formed even when the engine 11 is started after several hours have passed since the detection of the preliminary operation.

  In this way, by supplying a certain amount of traction oil immediately when a preliminary operation is detected, even if the engine 11 is started at an unexpected speed, the traction oil can be supplied before the start. . Further, when the supply amount of the traction oil reaches a certain amount, the supply is stopped, so that the traction oil is not supplied more than necessary. Therefore, when the supply mechanism 3 uses the power of the in-vehicle battery, useless consumption of the in-vehicle battery can be avoided.

(Second Embodiment)
FIG. 3 is a flowchart for explaining the control contents of the control means 2 in the second embodiment of the present invention.
The control means 2 in this example first waits for detection of the preliminary operation by the detection means 1 (step S11), and when the detection means 1 detects the preliminary operation, the supply mechanism 3 is immediately activated to operate the toroidal stepless. The supply of traction oil to the transmission 12 is started, and the count time T of the timer is reset to “0” simultaneously with the start of the supply of traction oil (step S12). After that, the count time T corresponding to the elapsed time counted by the timer is compared with a preset fixed time T1 (step S13), and the fixed time T1 has elapsed until the count time T reaches the fixed time T1. The supply mechanism 3 is operated until the traction oil is supplied.

  When the fixed time T1 has elapsed, it is determined whether or not the engine 11 as a power source has been started (step S14). If it has not yet started, the operation of the supply mechanism 3 is stopped to remove traction oil. Supply is stopped (step S17). On the other hand, when the engine 11 has already been started, the timer count time T is reset to “0” again (step S15), and then the timer count time T is compared with a preset fixed time T2. (Step S16). Until the count time T reaches a certain time T2, that is, until the certain time T2 elapses, the supply mechanism 3 is operated to continue to supply the traction oil. When the certain time T2 has elapsed, the operation of the supply mechanism 3 is activated. To stop the supply of traction oil (step S17).

  As described above, in the present embodiment, similarly to the first embodiment described above, it is assumed that the engine 11 is started at an unexpected speed by immediately starting the supply of traction oil when the preliminary operation is detected. Also, the traction oil can be supplied before the start-up. Further, when the engine 11 is not started even after the lapse of the predetermined time T1, the supply of the traction oil is stopped, so that the wasteful supply of the traction oil can be minimized. Therefore, when the supply mechanism 3 uses the power of the in-vehicle battery, it is possible to avoid as much as possible the useless consumption of the in-vehicle battery.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a lubrication device for a full toroidal continuously variable transmission without a trunnion, in addition to various half toroidal continuously variable transmissions such as a single cavity type and a double cavity type.

DESCRIPTION OF SYMBOLS 1 Detection means 2 Control means 3 Supply mechanism 11 Engine 12 Toroidal type continuously variable transmission

Claims (2)

In an oil supply device for a toroidal continuously variable transmission for supplying traction oil to a traction surface of a toroidal continuously variable transmission to which torque is input from a power source,
Detecting means for detecting in advance that the power source is started by a preliminary operation related to starting the power source, which is an operation associated with starting the power source;
A supply mechanism capable of supplying traction oil before starting the power source;
The supply mechanism is activated when the detection means detects in advance that the power source is started, and the operation of the supply mechanism is stopped when the power source is not started until a predetermined time elapses thereafter. Control means for stopping the operation of the supply mechanism when a certain time has passed after that when the power source is started before the certain time has passed ,
An oil supply device for a toroidal-type continuously variable transmission.   The oil supply device for a toroidal continuously variable transmission according to claim 1, wherein the supply mechanism includes an electric motor as a drive source.

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