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Engine start-up control device for hybrid vehicle

A hybrid vehicle and engine starting technology, applied in hybrid vehicles, starting devices with mechanical power storage, engine starting, etc., can solve problems such as engine speed reduction, connection shock, etc. Stall avoidance, improved drivability and ride comfort

Inactive Publication Date: 2016-10-12
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

in addition, Figure 9 When the torque reduction control of the direct injection engine 12 is performed before the K0 clutch 34 is connected, the engine speed NE is lowered because the connection timing determination time t2 is delayed by the delay time tdelay, which is caused by the subsequent engagement of the K0 clutch 34 In case of connection shock (fluctuation of output shaft torque)

Method used

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  • Engine start-up control device for hybrid vehicle
  • Engine start-up control device for hybrid vehicle
  • Engine start-up control device for hybrid vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] figure 1 It is a schematic configuration diagram including a skeleton diagram of a drive system of a hybrid vehicle 10 to which the present invention is applied. The hybrid vehicle 10 includes a direct injection engine 12 that directly injects fuel into cylinders, and a motor generator MG that functions as an electric motor and a generator as a driving force source for traveling. In addition, the output of the above-mentioned direct injection engine 12 and the motor generator MG is transmitted from the torque converter 14 as a fluid transmission device to the automatic transmission 20 through the turbine shaft 16 and the C1 clutch 18, and also through the output shaft 22, the differential The gear unit 24 transmits the transmission to the left and right drive wheels 26 . The torque converter 14 is provided with a lock-up clutch (L / U clutch) 30 ...

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Abstract

When a K0 clutch (34) is connected after a direct-injection engine (12) is ignition-started, as an engine rotation speed (NE) approaches a MG rotation speed (NMG), engine torque (TE) is decreased in proportion to a speed difference (NMG-NE), and a substantially constant engine rotation speed (NE) is maintained when the speed difference (NMG-NE) is substantially zero. Thus, overshoot of the direct-injection engine (12) or connecting shock can be suppressed regardless of any error in connection timing for the K0 clutch (34), so that improved drivability or ride can be obtained. Further, because the engine torque (TE) is gradually decreased in accordance with the speed difference (NMG-NE), stalling or the like due to the loss of independent rotation capability of the direct-injection engine (12) can be appropriately prevented compared to the case where the engine torque (TE) is decreased uniformly regardless of changes in the speed difference (NMG-NE).

Description

technical field [0001] The present invention relates to control at the time of engine start of a hybrid vehicle equipped with a direct injection engine. Background technique [0002] There is known a hybrid vehicle comprising (a) a direct-injection engine that directly injects fuel into cylinders, (b) a clutch that disconnects the direct-injection engine from a power transmission path, and (c) a rotary engine that functions at least as an electric motor. (d) The direct injection engine and the rotary engine can be used as driving power sources simultaneously or separately, and the direct injection engine can be started by injecting fuel into any cylinder and igniting it when the direct injection engine is stopped. The ignition of the direct injection engine starts. The hybrid vehicle described in Patent Document 1 is one example, and it is described that the crankshaft of the direct injection engine is rotated by connecting the friction clutch (friction engagement) during t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/06B60K6/48B60W10/02B60W20/00B60L50/16
CPCB60K6/48B60W10/02B60W10/06B60W20/40B60W2510/0241B60W2510/0638B60Y2300/73B60Y2400/426Y02T10/62B60L15/2054B60L2240/421B60L2240/423B60L2240/443B60L2240/486B60L2240/507B60W2710/0666B60L50/16B60L50/61F02N11/04F02N15/025F02N19/005F02N99/006F02N2019/008F02N2300/2002F16D2500/1066F16D2500/3061F16D2500/3065F16D2500/3067F16D2500/30816F16D2500/7041F16D2500/70454F16D2500/70456Y02T10/64Y02T10/70Y02T10/7072Y02T10/72Y10S903/902
Inventor 仲西直器加藤康之出盐幸彦小岛进
Owner TOYOTA JIDOSHA KK
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