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Methods and systems for vehicle driveline torque estimation

一种传动系、发动机扭矩的技术，应用在车辆部件、混合动力车辆、车辆子单元功能等方向，能够解决凸轮定位误差、退化、制造容差、系统误差等问题，达到改进发动机扭矩控制、改进发动机启动、改进混合式传动系操作的效果

Inactive Publication Date: 2015-03-18
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, providing an accurate estimate of the driveline torque produced by the engine to meet driver demand torque can be challenging
[0003] For example, engine torque estimates based solely on engine speed and load may not be as accurate as desired due to varying fuel composition, manufacturing tolerances in engine components, systematic errors (e.g., cam positioning errors), and factors that may affect engine torque. other conditions
Therefore, errors in estimating driveline torque (e.g., the sum of engine torque and motor torque) may cause the driver demand torque to be greater than or less than the desired driver demand torque
As a result, the transmission's ability to shift gears, driveline disconnect operations, and deliver accurate driver-demand torque is degraded

Method used

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  • Methods and systems for vehicle driveline torque estimation
  • Methods and systems for vehicle driveline torque estimation
  • Methods and systems for vehicle driveline torque estimation

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Embodiment Construction

[0027] The present invention relates to controlling driveline operation of a hybrid vehicle. A hybrid vehicle can consist of an engine and a starter / generator (DISG) or electric machine (e.g., motor / generator) integrated with the driveline, such as Figure 1-2 shown. The engine may operate with or without DISG via the driveline disconnect clutch during vehicle operation. The DISG is integrated into the driveline, on the same shaft as the engine crankshaft, and rotates every time the transmission torque converter impeller turns. Additionally, DISG may not be selectively engaged or disengaged from the driveline. Rather, the DISG is an integral part of the drive train. Additionally, DISG can operate with or without operating the engine. The drive train can be as image 3 According to the sequence shown in the Figure 4 method of operation. At last, Figure 5 An example offset position between two position recognition devices is shown.

[0028] see figure 1 , including m...

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Abstract

Systems and methods for improving hybrid vehicle torque control are presented. The system and methods included may estimate driveline torque via springs of a dual mass flywheel. The estimated driveline torque may provide feedback for adjusting operation of a driveline disconnect clutch and / or engine torque.

Description

technical field [0001] The present invention relates to a system and method for estimating driveline torque and operating a vehicle using the driveline torque estimate. The method may be used in particular in hybrid vehicles comprising a driveline with a disengaged clutch. Background technique [0002] A hybrid vehicle driveline may include a driveline disconnect clutch. A driveline disconnect clutch is selectively engageable to couple the engine to the motor and other driveline components. The driveline disconnect clutch may be opened during periods of low driver demand torque so that engine rotation may be stopped while the motor provides torque to control vehicle motion. At times of higher driver demand torque, the driveline disconnect clutch may be closed so that engine torque may be added to the motor torque to provide the desired driver demand torque. However, providing an accurate estimate of driveline torque produced by the engine to meet driver demand torque can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/02B60W10/06B60W10/10B60W10/24F02D43/00
CPCB60W20/10Y10S903/902B60W10/02B60W10/06B60W20/00B60W2510/1025B60W2710/0666B60W2422/40B60Y2400/48F16F15/131
Inventor A·O`C·吉布森J·A·多林S-H·李藤井雄二J·W·L·麦克卡莱姆W·R·古德温
Owner FORD GLOBAL TECH LLC
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