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Control method for engine cranking starting torque referenced to an engine stop position

一种发动机停止、起动转矩的技术，应用在发动机用电动机起动、发动机的起动、具有机械动力储存器的起动装置等方向，能够解决发动机速度控制困难等问题

Active Publication Date: 2014-12-24
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disconnect clutch pressure controller adjusts the clutch actuation pressure based on engine speed or acceleration, thus creating the potential for difficult engine speed control

Method used

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  • Control method for engine cranking starting torque referenced to an engine stop position
  • Control method for engine cranking starting torque referenced to an engine stop position
  • Control method for engine cranking starting torque referenced to an engine stop position

Examples

Experimental program
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Embodiment Construction

[0015] figure 1 An MHT configuration of components of a powertrain 10 is illustrated, which includes an internal combustion engine 12, an engine disconnect clutch 14, a high voltage battery 16, a high voltage to low voltage DC / DC converter 18, a low voltage battery 20, a low voltage starter 22, Torsional vibration damper 24 , electric motor 26 , torque converter 28 , torque converter bypass clutch 30 , transmission gearbox 32 , drive shaft 34 , final drive 36 , half shafts 38 , 40 and driven wheels 42 , 44 .

[0016] The torsional vibration damper 24 consists of a helical spring or a mechanism comprising a plurality of helical springs, wherein twisting applied to the damper causes displacement of the spring mechanism. The damper 24 dissipates torsional energy due to frictional contact between the moving spring and the side walls of the damper housing housing the spring.

[0017] A main transfer pump 46 driven by the engine 12 delivers pressurized hydraulic fluid to the hydrau...

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PUM

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Abstract

Disclosed is a control method for engine cranking starting torque referenced to an engine stop position, and an engine stops at a known cranking angle. The method includes actuating a clutch located in a torque path between a starting motor and the engine with desired pressure related to the known crank angle during the restart, and using the starting motor to drive the engine during the restart.

Description

technical field [0001] The present invention generally relates to a method of starting an engine of a hybrid electric vehicle (HEV) by transmitting torque from a starter motor to the engine via a clutch and a damper. Background technique [0002] A modular hybrid transmission (MHT) is a configuration of powertrain components that includes an internal combustion engine, torque damper, disconnect clutch, motor / generator, and torque converter. At start-up, the electric motor operates as a motor, using the high-voltage battery as the power source for the motor to crank the engine. [0003] In an MHT system, the key objective is to start the engine smoothly and quickly using the minimum amount of starter motor reserve torque. Using a uniform value to match the pressure profiles of all disconnect clutches can result in engine starts with different accelerations, which creates problems such as fuel / air cranking calibration, possible no starts, etc. The increased starting torque ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02N11/00
CPCB60K6/543B60K2006/4825B60W10/02B60W10/06B60W10/08B60W20/40B60W2510/0685B60W2510/244B60W2540/10B60W2710/023F02N11/08F02N15/022F02N2200/021Y02T10/62Y10T74/134B60W20/00
Inventor 伯纳德·D·奈夫西马文·P·卡拉斯卡布莱恩·T·苏
Owner FORD GLOBAL TECH LLC
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