JPH04127447U - automotive transmission - Google Patents

Abstract

(57) [Summary] [Purpose] Even when towing with the engine stopped,
To enable lubricating the lubricating parts of an automatic transmission. [Structure] An auxiliary oil pump 6 that is linked to the output shaft 3 in an automatic transmission is installed, and the discharge port of the main oil pump 5 is connected to the suction port of the auxiliary oil pump 6, and the rotor of the auxiliary oil pump 6 and the output shaft 3 A one-way clutch that locks the output shaft 3 in the forward rotational direction is interposed between the two, and the auxiliary oil pump 6 is operated to supply oil to the lubricating section during towing driving with the engine stopped.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to an automatic transmission for automobiles.

0002

[Conventional technology]

As shown in Figure 1, automatic transmissions for automobiles use torque control. A transmission mechanism 4 is provided between the input shaft 2 and the output shaft 3 driven by the converter 1, and the input shaft 2 The main oil pump 5 driven by the main oil pump 5 supplies lubricating oil to the bearings, gears, etc. of the transmission mechanism 4. It has a structure.

0003

[Problem that the idea aims to solve]

By the way, automatic transmissions like the ones above don't stop the engine. When the car is towed while the vehicle is stopped, the main oil pump 5 is stopped. This causes the problem of seizure of bearings and gears.

0004 In addition, the discharge amount of the main oil pump 5 decreases even when the engine rotates at low speed. As a result, the amount of lubricating oil decreases, causing the same seizure problem as above.

[0005] Therefore, this idea was developed to avoid problems when towing with the engine stopped or when the engine is rotating at low speed. Provides a sufficient supply of lubricating oil even at low speeds, preventing seizure of bearings, gears, etc. Our goal is to provide an automotive transmission that can.

[0006]

[Means to solve the problem]

In order to solve the above problems, this invention is a truck equipped with a main oil pump. An auxiliary oil pump linked to the output shaft of the transmission is installed, and this auxiliary oil Connect the pump suction port to the main oil pump discharge port, and connect the output shaft and the auxiliary oil pump. A one-way clutch is interposed between the pump rotor to lock the output shaft in the forward rotational direction. This configuration adopts the following configuration.

[0007]

[Effect]

During normal driving, the pressure oil discharged from the main oil pump acts on the auxiliary oil pump. , the auxiliary oil pump is released from the output shaft when the one-way clutch becomes free. It spins idle at a higher speed than the power shaft.

[0008] When towing with the engine stopped or driving with the engine running at low speed, use the main oil. If the pump stops or the discharge capacity of the auxiliary oil pump exceeds its discharge capacity. The one-way clutch is locked in the rotational direction of the output shaft, which causes the auxiliary The rotor of the oil pump rotates together with the output shaft, and the auxiliary oil pump operates to discharge oil. It turns out.

[0009]

【Example】

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

0010 The basic structure of automatic transmission is based on conventional technology based on Figure 1. As explained in the section, the output shaft 3 of this automatic transmission An auxiliary oil pump 6 is provided.

[0011] The auxiliary oil pump 6 has a pump chamber 8 in the housing 7, as shown in FIGS. 2 and 3. A large number of vanes 10 are attached in a radial arrangement to the rotor 9, which is housed eccentrically inside the rotor. A one-way club with an integrated bearing is installed between the rotor 9 and the output shaft 3 passing through the rotor 9. A switch 11 is interposed.

0012 The one-way clutch 11 locks the output shaft 3 when the output shaft 3 rotates in the forward running direction. It is incorporated to lock and connect the rotor 9 and the auxiliary oil pump 6. The suction port 12 is connected to the discharge port of the main oil pump 5 as shown in FIGS. 4A and 4B.

[0013] As shown in Figures 4A and B, the main oil pump 5 is connected between the suction side and the discharge side, and A bypass passage 14 in which a check valve 13 is incorporated is provided.

[0014] The automatic transmission incorporating the auxiliary pump 6 is shown in Figure 1. The example is for FR cars, but it is an automatic transmission for FF cars. Good too.

[0015] The automotive transmission of this invention has the above-mentioned configuration, and is suitable for automobiles. During normal driving, as shown in FIG. 4A, the main oil pump 5 is driven and the main oil The pump 5 pumps pressure oil that exceeds the capacity of the auxiliary oil pump 6 to the auxiliary oil pump 6. Therefore, the rotor 9 of the auxiliary oil pump 6 rotates in the same direction as the output shaft 3, and the auxiliary oil pump 6 rotates in the same direction as the output shaft 3. Since the on-way clutch 11 becomes free, the rotor 9 rotates at a higher speed than the output shaft 3. do.

[0016] Therefore, the pressure oil equivalent to the capacity of the main oil pump 5 is supplied to the outlet of the auxiliary oil pump 6. flows out and is supplied to the lubricated parts.

[0017] Next, when towing with the engine stopped, the main oil pump 5 stops and no longer sends oil. Since the output shaft 3 is rotating in this state, the auxiliary The torque direction of the oil pump 6 to the rotor 9 is reversed from that during normal running as described above. do.

[0018] Therefore, the one-way clutch 11 is locked, and the output shaft 3 and rotor 9 move in the same direction. They rotate together at a constant speed, the auxiliary oil pump 6 has a pump function, and the oil is bypassed. It will flow through channel 14 and be pumped to the lubricated parts.

[0019] The auxiliary oil pump 6 also functions as an auxiliary pump when the engine rotates at low speed. 5 and 6 will be explained.

[0020] FIG. 5A is a discharge capacity line showing the relationship between engine speed and discharge amount of the main oil pump 5. FIG. 3 shows that the discharge amount increases as the engine speed increases.

[0021] However, when actually driving a car, the discharge capacity line of the main oil pump and vehicle speed in Figure 5B As shown in the diagram, the engine Since the rotation speed is low, the discharge amount decreases.

[0022] FIG. 6A is a performance diagram showing the relationship between the auxiliary oil pump 6 and vehicle speed, and the discharge amount is Increases with speed.

[0023] Therefore, when the main oil pump 5 and the auxiliary oil pump 6 are used in combination, As shown in the diagram of vehicle speed and discharge capacity, at each low engine revolution when the range changes. The auxiliary oil pump 6 is activated and the discharge amount of the auxiliary oil pump 6 is added. , there is no large fluctuation in the total discharge amount, and the lubricated parts can be reliably supplied with oil.

[0024]

【effect】

As described above, according to this invention, the compensation that is linked to the output shaft of the transmission is Install the auxiliary oil pump, and connect the main oil pump's discharge port and the auxiliary oil pump's suction port. At the same time, install a one-way clamp between the auxiliary oil pump rotor and output shaft. Since the engine is stopped, the auxiliary pump is not activated when driving with the engine stopped. This allows lubricating parts to be supplied with oil, preventing seizure of bearings and gears, and allowing long-distance driving of automobiles. , enabling high-speed towing.

[0025] In addition, even if an auxiliary oil pump is installed, the one-way clutch allows normal operation. The power loss during operation is small, and the auxiliary oil pump uses the main oil at low engine speeds. This allows the main oil pump to be downsized.

[Brief explanation of drawings]

[Figure 1] Illustration of an automatic transmission incorporating an auxiliary oil pump

[Figure 2] Vertical front view of the auxiliary oil pump

[Figure 3] Longitudinal side view same as above

[Fig. 4] (A) is an explanatory diagram showing the oil flow when the main oil pump is operating, and (B) is an explanatory diagram showing the oil flow when the main oil pump is stopped.

[Figure 5] (A) is a discharge capacity diagram of the main oil pump and engine speed, (B) is a discharge capacity diagram of the main oil pump and vehicle speed.

[Figure 6] (A) is a discharge capacity diagram of the auxiliary oil pump and vehicle speed, (B) is a discharge capacity diagram of the main oil pump plus the auxiliary oil pump and vehicle speed.

[Explanation of symbols]

1 Torque converter 2 Input shaft 3 Output shaft 4 Transmission mechanism 5 Main oil pump 6 Auxiliary oil pump 7 Housing 8 Pump room 9 Rotor 10 Vane 11 One-way clutch 12 Inlet

Claims (1)

[Scope of utility model registration request] Claim 1: An auxiliary oil pump is installed in conjunction with an output shaft of a transmission equipped with a main oil pump, an inlet of the auxiliary oil pump is connected to a discharge port of the main oil pump, and the output shaft and the auxiliary oil pump are connected to each other. An automotive transmission with a one-way clutch interposed between the rotors that locks the output shaft in the forward rotational direction.