JPS5853518A - Inertia running apparatus of automobile with automatic transmission - Google Patents

Abstract

PURPOSE:To lower the cost for fuel, by directly connecting input and output shafts through a multiple disc clutch when the automobile is running at low speed or engine brake is needed, and transmitting the power with locking effected by a one-way clutch when it is driven by the engine. CONSTITUTION:When a manual valve is set at the drive range, and the car speed is at a set value, the multiple disc clutch 8 is released by the governor pressure generated in a hydraulic pressure controller of an automatic transmission 2 to actuate the one-way clutch 9, or it is engaged by the switching operation or brake pedal operation by a driver. Therefore during the drive range running, inertia running is effected at a car speed of a set value or more at all times, so that unnecessary deceleration and fuel consumption due to the action of the engine brake can be prevented. Thus by arranging the multiple disc clutch 8 and the one-way clutch 9 side by side, the fuel consumption can be lowered using the inertia running during the steady running, and the switching from the inertia running to the engine drive or vice versa becomes possible at a certain car speed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inertial traveling device for reducing fuel consumption of an automobile with an automatic transmission.

With an automatic transmission, the connection between the engine and the driving wheels is disconnected while driving, and in order to run inertia, it is necessary to shift the shift lever to N (Etral) range, so engine braking is not required when driving on the beach. The vehicle tends to be driven in D range even when driving, which causes poor fuel efficiency.

An object of the present invention is to enable inertial driving even when the shift lever is set in the D range, except under certain driving conditions set in advance or selected by the driver.

An object of the present invention is to provide an automatic rate inertial traveling device with an automatic transmission that improves fuel efficiency.

Next, the present invention will be explained based on embodiments shown in the drawings.

A hydrodynamic torque converter 1 is attached to the rear of the engine, and an automatic transmission system 2, which automatically shifts multiple forward speeds and one reverse speed, includes the torque converter 1 and a differential 3. The inertial traveling device 4 according to the present invention is inserted between the torque converter and the gear transmission. The inertial traveling device of the present invention includes a multi-disc clutch 8 operated by a hydraulic servo 7, and a multi-disc clutch 8 operated by a hydraulic servo 7 between an input shaft 5 which is a torque converter output shaft and an output shaft 6 which is an automatic transmission input shaft. Eight one-way clutches 9 are provided in parallel that are locked during engine drive and released during engine braking.

The multi-disc clutch 8 is controlled by governor pressure that is generated within the hydraulic control device of the automatic transmission and changes depending on the vehicle speed.The manual valve is set to the drive (D) range and the vehicle speed is adjusted to the set value (
For example, it is released when the speed is 40 km/h or higher), and is always engaged when the driver operates a switch installed in the driver's seat or depresses the brake pedal. As a result, when the vehicle is running in the D range and the speed is above the set speed, inertia running is always performed, and unnecessary deceleration and fuel consumption due to engine braking are eliminated, resulting in improved fuel efficiency.

The reason why the multi-disc clutch 8 is engaged when the vehicle speed is below the set speed is to cope with the increase in transmitted torque at low speeds, and because there are many driving conditions that require engine braking at low speeds, so the driver can use a switch to engage the multi-plate clutch 8. The reason why the plate clutch 2 can be engaged at all times is because it is necessary to use the engine brake and increase the transmission torque capacity when driving on a slope.

As described above, the inertial traveling device of the automatic transmission mode vehicle of the present invention includes a multi-plate clutch that is engaged only when driving at low speeds and when engine braking is required, and directly connects the input shaft and the output shaft, and is provided in parallel with the clutch. It consists of a one-way clutch that locks and transmits power when the engine is driving, so: 0) The inertia of the vehicle can be used during steady driving, making it possible to drive with low fuel consumption.

(b) Below a certain vehicle speed, the torque converter and the transmission are connected via a multi-plate clutch, and above a certain vehicle speed, the torque converter and the transmission are connected via a one-way clutch, so the drive shaft and driven shaft are It is possible to apply engine braking depending on the relative movement of the engine.

The operation of the e9 inertia device can be selected by changing a switch, so the driver can perform movements according to his needs.

[Brief explanation of drawings]

Figure 1 shows an automatic transmission w equipped with the inertial traveling device of the present invention.
A schematic diagram of the transmission mechanism of the A-equipped vehicle is shown. l...Hydraulic torque converter 2...Idle JL gear transmission 4...Inertia traveling device 5...Input shaft 6.
...Output shaft 7...Hydraulic servo 8...Multi-plate clutch 9...One-way clutch 1st m

Claims (1)

[Scope of Claims] A multi-plate clutch that is engaged only when driving at low speeds or when engine braking is required to directly connect the input shaft and output shaft, and a multi-disc clutch that is provided in parallel with the clutch and locks and transmits power when the engine is driving. □Inertia traveling device for automobiles with automatic transmission, consisting of a one-way clutch. The two human power shafts are connected to the hydraulic torque converter output shaft,
The automatic rate inertial traveling device with an automatic transmission as claimed in claim 1, wherein the output shaft is connected to a human power shaft of a planetary-vehicle transmission.