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System for controlling mechanical automatic gear system

An automatic transmission device and control system technology, which is applied to mechanical equipment, clutches, etc., can solve problems such as shocks, and achieve the effects of preventing shocks and suppressing cost increases

Inactive Publication Date: 2014-02-26
MITSUBISHI FUSO TRUCK AND BUS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this automatic transmission, if the clutch is disengaged when shifting gears, the power of the engine is suddenly cut off, so shocks sometimes occur.

Method used

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  • System for controlling mechanical automatic gear system
  • System for controlling mechanical automatic gear system
  • System for controlling mechanical automatic gear system

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment ）

[0036] figure 1 It is a schematic configuration diagram of the control system of the mechanical automatic transmission according to the first embodiment of the present invention. Next, the configuration of the control system of the mechanical automatic transmission will be described.

[0037] Such as figure 1 As shown, the control system of the mechanical automatic transmission is mounted on a vehicle not shown, and generally consists of an engine (internal combustion engine) 10, a mechanical automatic transmission (transmission unit) 20, and an electronic control unit (hereinafter referred to as ECU). (control unit) 30 constitutes. In addition, each constituent element is electrically connected.

[0038] The engine 10 generates power in accordance with the amount of operation of an accelerator pedal (not shown) by the driver. In addition, the engine 10 is provided with: a crank angle sensor (operating state detection unit) 11 that detects the rotational speed of the engin...

no. 2 Embodiment ）

[0070] Next, a control system of a mechanical automatic transmission according to a second embodiment of the present invention will be described.

[0071] In the second embodiment, with respect to the above-mentioned first embodiment, image 3 The operation control of the clutch after the clutch stroke Scl of c passes through the half-clutch start position is different, and the difference from the above-mentioned first embodiment will be described below.

[0072] Figure 5 It is a control block diagram showing the clutch operation control sequence of the control system of the mechanical automatic transmission according to the second embodiment of the present invention. in addition, Image 6 It is a time-series diagram showing the clutch control state in the ECU 30 of the control system of the mechanical automatic transmission according to the second embodiment of the present invention during the shift operation. In the figure, the thick dotted line indicates the torque outp...

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Abstract

Engine torque (Teg) is calculated by an engine torque calculation unit (31) on the basis of the speed of an engine (10) and the amount of intake air, and the amount of fuel injected. The speed change amount (aeg) is furthermore calculated by a speed change amount calculation unit (32). Clutch torque (Tcl) is calculated by a clutch torque calculation unit (33) on the basis of the engine torque (Teg), speed change amount (aeg), engine inertia moment (Ieg) and formula (1). Clutch stroke (Scl) is then calculated by a clutch stroke calculation unit (34) from a map indicating the relationship between the clutch torque (Tcl) and the clutch stroke (Scl), and a clutch operation unit (25) is actuated in such a way as that the clutch stroke (Scl) is achieved.

Description

technical field [0001] The invention relates to a control system of a mechanical automatic transmission, in particular, to a clutch control during transmission. Background technique [0002] As a transmission device for a vehicle, there is known a mechanical automatic transmission that can perform operations (selection and shifting) of a transmission in a manual transmission and disconnection / engagement of a clutch by using an actuator. Automatic shifting (Patent Document 1). In this automatic transmission, if the clutch is disengaged during gear shifting, the power of the engine is suddenly cut off, which may cause a shock. [0003] Therefore, in an automatic transmission, for example, as shown in Patent Document 1, the clutch is disengaged by bringing the engine torque into a no-load state, or as shown in Patent Document 2, the speed at which the clutch is disengaged is changed according to the engine torque. , or as shown in Patent Document 3, control the engine torque ...

Claims

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Application Information

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IPC IPC(8): F16D48/02
CPCF16D2500/50684F16D2500/70412F16D48/06F16D2500/5048
Inventor 小关哲郎
Owner MITSUBISHI FUSO TRUCK AND BUS CORPORATION
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