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Control device of vehicle power transmission mechanism

A technology of power transmission mechanism and control device, which is applied in the direction of road vehicle drive control system, transmission device, fluid transmission device, etc., can solve problems such as engine stall, and achieve the effect of improving drivability

Inactive Publication Date: 2012-04-04
SUZUKI MOTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the engine speed is lower than the target idle speed, there is a possibility of engine stall

Method used

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  • Control device of vehicle power transmission mechanism
  • Control device of vehicle power transmission mechanism
  • Control device of vehicle power transmission mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] Figure 1 to Figure 7 An example of the present invention is shown.

[0034] exist figure 1 Among them, reference numeral 1 is an internal combustion engine mounted on a vehicle, reference numeral 2 is a vehicle power transmission mechanism connected to the internal combustion engine 1 , and reference numeral 3 is a control device for the vehicle power transmission mechanism 2 .

[0035] The internal combustion engine 1 has a fuel injection valve 4 constituting a fuel control device.

[0036]The vehicle power transmission mechanism 2 includes a continuously variable transmission (CVT) 5 and a fluid transmission device (torque converter) 7 with a lockup clutch, and is connected to the internal combustion engine 1 . The fluid transmission device 7 with a lock-up clutch has a lock-up clutch 6 and is composed of a turbine 9 and the like. The lock-up clutch 6 has a lock-up solenoid valve 8 .

[0037] The control device 3 is composed of an engine control unit (ECM: Engin...

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PUM

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Abstract

The present invention provides a control device of a vehicle power transmission mechanism, provided with a first map capable of performing coast down control of altering a transmission ratio of a continuously variable transmission at a time of deceleration of a vehicle has a second map which is set by making a lock-up release vehicle speed for releasing a lock-up clutch and an engine rotation frequency correspond to each other, wherein, when cost down control is performed, the second map is used to set a lock-up release vehicle speed for releasing the lock-up clutch.

Description

technical field [0001] The present invention relates to a control device for a power transmission mechanism for a vehicle, and in particular to a control device for a power transmission mechanism for a vehicle including a continuously variable transmission and a fluid transmission device with a lock-up clutch, that is, for resuming fuel supply of an internal combustion engine and for locking and disengaging A control device for a power transmission mechanism for a vehicle. Background technique [0002] In fuel injection control of an internal combustion engine (engine) mounted on a vehicle, there is a fuel cut control at the time of deceleration as one type of fuel cut control. [0003] For example, when the accelerator opening (or throttle opening) is below a predetermined value, the vehicle speed is above a predetermined value, and the engine speed is above a predetermined value, the control device of the vehicle power transmission mechanism performs a fuel cut during dece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/14
CPCF16H61/66259B60Y2300/46F16H61/143F16H2059/186B60Y2300/18066F16H61/14Y02T10/60
Inventor 榎本和也铃木和彦
Owner SUZUKI MOTOR CORP