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Method and system for four-wheel drive vehicle drivetrain

A four-wheel drive and powertrain technology, applied in the field of drivability and fuel economy systems, can solve problems such as non-response, reduce wear, improve vehicle drivability, and increase operating life

Active Publication Date: 2019-03-05
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not possible to operate a hybrid vehicle in a similar manner when operating in a different driveline configuration
Additionally, control commands and responses may not have the desired response if they simply shift from a two-wheel or four-wheel high gear mode to a four wheel drive low gear mode

Method used

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  • Method and system for four-wheel drive vehicle drivetrain
  • Method and system for four-wheel drive vehicle drivetrain
  • Method and system for four-wheel drive vehicle drivetrain

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Embodiment Construction

[0034] The present invention relates to controlling the drive train of a hybrid vehicle. Such as Figure 1-3 The hybrid vehicle shown may include an engine and an electric machine. The engine may be run with or without a driveline integrated starter / generator (DISG) during vehicle operation. The DISG is integrated in the drive train on the same axis as the engine crankshaft and rotates whenever the torque converter impeller rotates. Additionally, DISG may be selectively disengaged or disengaged from the driveline. Of course, DISG is a necessary part of the drive train. Still further, DISG may be operated with or without the engine running. The mass and inertia of the DISG belongs to the driveline when the DISG is not operating to provide or absorb torque from the driveline. Can be based on Figure 4-10 The method shown is for operating a vehicle driveline. Figure 11-13 shows the basis of Figure 4-10 An example vehicle run sequence for the method shown.

[0035] refe...

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PUM

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Abstract

The method involves automatically restarting an engine (10) in response to a first condition while the hybrid vehicle is operated in a four wheel drive low gear range. The engine is automatically restarted in response to a second condition other than the first condition while the hybrid vehicle is not operated in the four wheel drive low gear range. The engine is not started in response to releasing a brake pedal during the second condition and the engine is started in response to releasing the brake pedal during the first condition.

Description

【Technical field】 [0001] The present invention relates to systems and methods for improving drivability and fuel economy of vehicles. The method may be particularly useful for engines that are selectively connected to electric machines and transmissions. 【Background technique】 [0002] Hybrid vehicles potentially offer improvements in fuel efficiency and vehicle range over non-hybrid vehicles. However, it is not possible to operate a hybrid vehicle in a similar manner when operating in a different driveline configuration. Furthermore, control commands and responses may not have the desired response if they simply shift from a two-wheel or four-wheel high gear mode to a four wheel drive low gear mode. For example, restarting a stopped engine while the vehicle is in 4WD low range in the same manner as when the vehicle was in 2WD mode, the vehicle may not start the vehicle in the same manner as starting the vehicle in 2WD mode. 【Content of invention】 [0003] The inventors...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/18B60W10/02B60W10/06B60W10/08B60W10/10B60W10/18B60W10/30
CPCB60K6/48B60K2006/4825B60W10/02B60W10/023B60W10/06B60W10/08B60W30/18045Y02T10/62B60K6/52B60W20/10B60W2510/1005B60W2540/12
Inventor J·A·多尔因A·O`C·吉布森G·M·皮尔特伦J·W·L·麦克卡莱姆藤井雄二
Owner FORD GLOBAL TECH LLC