JP3942401B2 - Engine start system - Google Patents

Engine start system Download PDF

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Publication number
JP3942401B2
JP3942401B2 JP2001332103A JP2001332103A JP3942401B2 JP 3942401 B2 JP3942401 B2 JP 3942401B2 JP 2001332103 A JP2001332103 A JP 2001332103A JP 2001332103 A JP2001332103 A JP 2001332103A JP 3942401 B2 JP3942401 B2 JP 3942401B2
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JP
Japan
Prior art keywords
engine
ring gear
pinion gear
starter
motor
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Expired - Fee Related
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JP2001332103A
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Japanese (ja)
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JP2003139029A (en
Inventor
正彦 長田
幹男 齋藤
裕二 西岡
中村　　勉
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Denso Corp
Soken Inc
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Denso Corp
Nippon Soken Inc
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Priority to JP2001332103A priority Critical patent/JP3942401B2/en
Priority to DE10249381.2A priority patent/DE10249381B4/en
Publication of JP2003139029A publication Critical patent/JP2003139029A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0859—Circuits or control means specially adapted for starting of engines specially adapted to the type of the starter motor or integrated into it
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0851—Circuits or control means specially adapted for starting of engines characterised by means for controlling the engagement or disengagement between engine and starter, e.g. meshing of pinion and engine gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
    • F02N15/067—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement the starter comprising an electro-magnetically actuated lever
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
    • F02N15/062—Starter drives
    • F02N15/063—Starter drives with resilient shock absorbers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
    • F02N2200/021—Engine crank angle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/04—Parameters used for control of starting apparatus said parameters being related to the starter motor
    • F02N2200/044—Starter current

Description

【０００１】
【発明の属する技術分野】
本発明は、スタータによりエンジンを始動させるエンジン始動システムに関する。
【０００２】
【従来の技術】
従来より、エンジン始動を行うためのピニオン飛込み式スタータが知られている。このピニオン飛込み式スタータは、始動時にピニオンギヤを押し出してエンジンのリングギヤに噛み合わせた後、スタータモータの回転力をピニオンギヤに伝達して、そのピニオンギヤからリングギヤにモータトルクを伝達することによりエンジンを始動している。
【０００３】
【発明が解決しようとする課題】
ところが、上記のスタータは、ピニオンギヤとリングギヤとの間にバックラッシュが設けられているため、ピニオンギヤからリングギヤへのトルク伝達がエンジンの負荷変動に応じて間欠的に行われる。つまり、エンジン回転速度は、ピストンが上死点から下死点へ向かう時に速くなり、ピストンが下死点から上死点へ向かう時に遅くなるため、エンジン回転速度が遅くなる過程でピニオンギヤからリングギヤにトルク伝達が行われる際に、上記のバックラッシュの影響でピニオンギヤがリングギヤに繰り返し衝突する。その結果、ギヤ同士の衝突によって大きな衝突音が発生する（エンジン始動音が大きくなる）と共に、ピニオンギヤ及びリングギヤが損傷するという問題があった。
【０００４】
本発明は、上記事情に基づいて成されたもので、その目的は、ピニオンギヤからリングギヤにトルク伝達が行われる際に生じる衝撃力を緩和することにより、衝突音の低減及びギヤの損傷を防止できるエンジン始動システムを提供することにある。
【０００５】
【課題を解決するための手段】
（請求項１の発明）
始動モータの印加電圧を制御する電圧制御手段は、エンジンのピストンが下死点を過ぎてエンジン回転数が低下する過程で、ピニオンギヤとリングギヤとの回転速度差によりピニオンギヤの歯面がリングギヤの歯面に衝突する前に、ピニオンギヤとリングギヤとの回転速度差が小さくなる様に始動モータの印加電圧を下げることを特徴とする。
【０００６】
これにより、ピニオンギヤとリングギヤとの回転速度差が小さくなることで、ピニオンギヤの歯面がリングギヤの歯面にソフトに当たるため、その当接時の衝撃力が緩和されてギヤ同士の衝突音を低減でき、且つピニオンギヤ及びリングギヤの損傷を防止できる。
【０００７】
（請求項２の発明）
始動モータの印加電圧を制御する電圧制御手段は、エンジンのピストンが上死点を過ぎてエンジン回転数が上昇する時に、ピニオンギヤとリングギヤとの回転速度差が小さくなる様に始動モータの印加電圧を上げることを特徴とする。
この場合、エンジン回転数の上昇に追従させて始動モータの回転数を上昇させるため、ピニオンギヤとリングギヤとの回転速度差が小さくなる。その結果、ピニオンギヤの歯面がリングギヤの歯面に衝突する時の衝撃力が緩和されるため、ギヤ同士の衝突音を低減でき、且つピニオンギヤ及びリングギヤの損傷を防止できる。
【０００８】
（請求項３の発明）
請求項１または２に記載したエンジン始動システムにおいて、
電圧制御手段は、始動モータの印加電圧を制御する制御開始時期を、点火信号、噴射信号、クランク角信号のエンジン制御信号、または始動モータに通電される電流の変動時期に基づいて決定する。
【０００９】
ピニオンギヤの歯面がリングギヤの歯面に衝突する時期は、例えばエンジンの上死点または下死点からの経過時間として推定できる。従って、エンジンの上死点または下死点を特定できるエンジン制御信号あるいは始動モータに通電される電流の変動時期に基づいて制御開始時期を決定することができる。なお、始動モータに通電される電流は、エンジンの負荷変動に対応して変化するため、電流値が増大傾向から減少傾向に変わる時期（エンジンの上死点に相当する）、あるいは減少傾向から増大傾向に変わる時期（エンジンの下死点に相当する）を検出することでエンジンの上死点及び下死点を特定できる。
【００１０】
【発明の実施の形態】
次に、本発明の実施形態を図面に基づいて説明する。
（第１実施例）
図１はエンジン始動システムの電気回路図である。
本実施例のエンジン始動システムは、エンジン（図示しない）を始動するためのスタータ（下述する）と、このスタータに使用される始動モータ１の印加電圧を制御するＥＣＵ２（本発明の電圧制御手段）とを備えている。
【００１１】
スタータは、回転力を発生する始動モータ１と、この始動モータ１の通電電流をON/OFF制御する電磁スイッチ３、及びエンジンのリングギヤ（図示しない）に噛み合って始動モータ１の回転力をリングギヤに伝達するピニオンギヤ（図示しない）等より構成される周知のピニオン飛込み式スタータである。
始動モータ１は、例えば直流電動機であり、電磁スイッチ３により始動モータ１の通電回路（図１参照）が閉成すると、バッテリ４からアーマチャ１ａに給電されてアーマチャ１ａに回転力が発生する。
【００１２】
電磁スイッチ３は、通電を受けて磁力を発生する励磁コイル３ａと、この励磁コイル３ａの内周に摺動自在に嵌装されるプランジャ３ｂとを有し、励磁コイル３ａが発生する磁力を受けてプランジャ３ｂが吸引されると、プランジャ３ｂに具備される可動接点３ｃが一組の固定接点３ｄに当接して両固定接点３ｄ間を導通することにより、始動モータ１の通電回路を閉成する。
ピニオンギヤは、始動モータ１に回転駆動される出力軸（図示しない）に設けられ、エンジン始動時に出力軸上を前方へ押し出されてリングギヤに噛み合う。
【００１３】
ＥＣＵ２は、IGキー５がST端子５ａに投入されると、バッテリ４から電力の供給を受けて起動し、始動モータ１に通電開始された後、始動モータ１に印加されるバッテリ電圧を制御素子６を介してＰＷＭ制御する。
制御素子６は、例えばトランジスタ等のスイッチング素子であり、電磁スイッチ３に設けられる一方の固定接点３ｄとバッテリ４との間に接続されている。
【００１４】
次に、エンジン始動システムの動作手順を図２に示すフローチャートに基づいて説明する。
Step10…IGキー５がST端子５ａに投入されると、ＥＣＵ２に始動信号が入力されてＥＣＵ２が起動する。
Step20…スタータリレー７がONする。このスタータリレー７は、ST端子５ａに接続されたリレーコイル７ａと、バッテリ４と励磁コイル３ａとの間に設けられたリレースイッチ７ｂとで構成され、リレーコイル７ａに通電されるとリレースイッチ７ｂがONする。
【００１５】
Step30…リレースイッチ７ｂがONすると、バッテリ４から電磁スイッチ３の励磁コイル３ａに通電されてプランジャ３ｂが吸引される。
Step40…プランジャ３ｂの移動により、プランジャ３ｂに具備された可動接点３ｃが一組の固定接点３ｄに当接して始動モータ１の通電回路が閉成する。その結果、バッテリ４から制御素子６を介して始動モータ１に通電が開始される。
【００１６】
Step50…始動モータ１の印加電圧を制御する制御開始時期を外部信号に基づいて判定する。例えば、図３に示す様に、エンジン制御信号（点火信号、噴射信号、クランク角信号等）あるいは始動モータ１の通電電流の変動時期（極大値または極小値）が検出されてから所定時間Δｔが経過したか否かを判定する。判定結果がYES の時はStep60へ進み、判定結果がNOの時は所定時間Δｔが経過するまでStep50を繰り返し実行する。
【００１７】
この制御開始時期は、図４に示す様に、クランキング中のエンジン負荷変動によりエンジン回転数が低下する時（ピストンが下死点から上死点へ向かう過程）に、ピニオンギヤとリングギヤとの回転速度差からピニオンギヤの歯面がリングギヤの歯面に衝突する時期（図中のエンジン回転数とスタータ回転数とが交差するＡ点）より少し手前に設定される。なお、ピニオンギヤの歯面がリングギヤの歯面に衝突する時期は、上記のエンジン制御信号または始動モータ１の通電電流の変動時期から推定できるため、所定時間Δｔを適宜に設定することにより、ギヤ衝突時期の少し手前から制御を開始することができる。
【００１８】
Step60…始動モータ１の印加電圧を制御する。具体的には、ピニオンギヤとリングギヤとの回転速度差が小さくなる様に、始動モータ１の印加電圧を下げる。
Step70…外部信号によりエンジンの始動判定を行う。
この判定結果がYES の時はStep80へ進み、判定結果がNOの時はエンジン始動が確認されるまでStep70を繰り返し実行する。
Step80…スタータリレー７をOFF して電磁スイッチ３への通電を停止する。
Step90…電磁スイッチ３への通電停止により、プランジャ３ｂが元の位置へ押し戻されるので、可動接点３ｃが一組の固定接点３ｄから離脱して始動モータ１の通電回路を開くことにより、始動モータ１への通電が停止する。
【００１９】
（第１実施例の効果）
本実施例のエンジン始動システムは、ピニオンギヤの歯面がリングギヤの歯面に衝突する前に始動モータ１の印加電圧を下げる様に制御している。これにより、図４に破線グラフで示す様にスタータ回転数が低下するので、ピニオンギヤとリングギヤとの回転速度差が小さくなる。その結果、ピニオンギヤの歯面がリングギヤの歯面にソフトに当たるため、ギヤ当接時の衝撃力が緩和されてギヤ同士の衝突音を低減することができ、且つピニオンギヤ及びリングギヤの損傷を防止できる。
【００２０】
（第２実施例）
本実施例は、始動モータ１の制御開始時期をエンジン回転数が上昇する初期（ピストンが上死点を過ぎた直後）に設定して、スタータ回転数をエンジン回転数に追従させる様に始動モータ１の印加電圧を制御する一例である。
具体的には、エンジン回転数が上昇する初期に始動モータ１の印加電圧を上げることにより、図５に破線グラフで示す様にスタータ回転数がエンジン回転数に追従する様に上昇するので、ピニオンギヤとリングギヤとの回転速度差が小さくなる。その結果、エンジン回転数が低下する過程でピニオンギヤの歯面がリングギヤの歯面に当たる時（図中Ａ点）に、その衝撃力が緩和されるため、ギヤ同士の衝突音を低減することができ、且つピニオンギヤ及びリングギヤの損傷を防止できる。
【図面の簡単な説明】
【図１】エンジン始動システムの電気回路図である。
【図２】本実施例の動作手順を示すフローチャートである。
【図３】外部信号と始動モータの制御開始時期を示すタイムチャートである。
【図４】エンジン回転数とスタータ回転数の変化を表すグラフである（第１実施例）。
【図５】エンジン回転数とスタータ回転数の変化を表すグラフである（第２実施例）。
【符号の説明】
１ 始動モータ
２ ＥＣＵ（電圧制御手段）
６ 制御素子（電圧制御手段）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine start system that starts an engine with a starter.
[0002]
[Prior art]
Conventionally, a pinion jump starter for starting an engine is known. This start-up type starter pushes out the pinion gear at the start and engages with the ring gear of the engine, then transmits the torque of the starter motor to the pinion gear, and starts the engine by transmitting the motor torque from the pinion gear to the ring gear. ing.
[0003]
[Problems to be solved by the invention]
However, since the starter has a backlash provided between the pinion gear and the ring gear, torque transmission from the pinion gear to the ring gear is intermittently performed according to engine load fluctuations. In other words, the engine speed increases when the piston moves from top dead center to bottom dead center, and slows when the piston moves from bottom dead center to top dead center. When torque transmission is performed, the pinion gear repeatedly collides with the ring gear due to the influence of the backlash. As a result, there is a problem that a large collision sound is generated due to the collision between the gears (the engine starting sound is increased), and the pinion gear and the ring gear are damaged.
[0004]
The present invention has been made based on the above circumstances, and its purpose is to reduce impact noise and prevent gear damage by relaxing the impact force generated when torque is transmitted from the pinion gear to the ring gear. It is to provide an engine starting system.
[0005]
[Means for Solving the Problems]
(Invention of Claim 1)
The voltage control means for controlling the voltage applied to the starter motor is a process in which the piston of the engine passes the bottom dead center and the engine speed decreases, and the tooth surface of the pinion gear is caused by the difference in rotational speed between the pinion gear and the ring gear. Before the collision, the applied voltage of the starting motor is lowered so that the rotational speed difference between the pinion gear and the ring gear becomes small.
[0006]
As a result, the difference in rotational speed between the pinion gear and the ring gear is reduced, so that the tooth surface of the pinion gear softly touches the tooth surface of the ring gear, so the impact force at the time of contact is relaxed and the collision noise between the gears can be reduced. And damage to the pinion gear and the ring gear can be prevented.
[0007]
(Invention of Claim 2)
The voltage control means for controlling the applied voltage of the starter motor is configured to set the applied voltage of the starter motor so that the rotational speed difference between the pinion gear and the ring gear becomes small when the engine piston speed passes the top dead center and the engine speed increases. It is characterized by raising.
In this case, the rotational speed difference between the pinion gear and the ring gear is reduced because the rotational speed of the starting motor is increased following the increase in the engine rotational speed. As a result, since the impact force when the tooth surface of the pinion gear collides with the tooth surface of the ring gear is alleviated, the collision noise between the gears can be reduced and damage to the pinion gear and the ring gear can be prevented.
[0008]
(Invention of Claim 3)
The engine start system according to claim 1 or 2,
Voltage control means, the control start timing for controlling the voltage applied to the starter motor, ignition signal, injection signal is determined based on the variation time of current applied to the crank SumiShin No. engine control signal or the starter motor.
[0009]
The timing at which the tooth surface of the pinion gear collides with the tooth surface of the ring gear can be estimated as an elapsed time from the top dead center or the bottom dead center of the engine, for example. Therefore, the control start time can be determined based on the engine control signal that can specify the top dead center or the bottom dead center of the engine or the fluctuation time of the current that is supplied to the starting motor. Since the current supplied to the starter motor changes in response to engine load fluctuations, the current value changes from an increasing trend to a decreasing trend (corresponding to the top dead center of the engine) or increases from a decreasing trend. The top dead center and bottom dead center of the engine can be specified by detecting the time when the trend changes (corresponding to the bottom dead center of the engine).
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is an electric circuit diagram of an engine start system.
The engine start system of the present embodiment includes a starter (described below) for starting an engine (not shown), and an ECU 2 (voltage control means of the present invention) that controls an applied voltage of a starter motor 1 used for the starter. ) And.
[0011]
The starter meshes with the starter motor 1 that generates torque, the electromagnetic switch 3 that controls ON / OFF of the energization current of the starter motor 1, and the ring gear (not shown) of the engine so that the torque of the starter motor 1 is converted into the ring gear. This is a known pinion jump-in starter configured by a pinion gear (not shown) for transmission.
The starter motor 1 is, for example, a DC motor. When the energization circuit (see FIG. 1) of the starter motor 1 is closed by the electromagnetic switch 3, power is supplied from the battery 4 to the armature 1a to generate a rotational force in the armature 1a.
[0012]
The electromagnetic switch 3 includes an exciting coil 3a that generates a magnetic force when energized, and a plunger 3b that is slidably fitted on the inner periphery of the exciting coil 3a, and receives the magnetic force generated by the exciting coil 3a. When the plunger 3b is sucked, the movable contact 3c provided in the plunger 3b comes into contact with the pair of fixed contacts 3d and conducts between the fixed contacts 3d, thereby closing the energization circuit of the starter motor 1. .
The pinion gear is provided on an output shaft (not shown) that is rotationally driven by the starter motor 1, and is pushed forward on the output shaft and meshed with the ring gear when the engine is started.
[0013]
When the IG key 5 is inserted into the ST terminal 5a, the ECU 2 is activated by receiving power from the battery 4, starts energizing the starter motor 1, and then determines the battery voltage applied to the starter motor 1 as a control element. 6 for PWM control.
The control element 6 is a switching element such as a transistor, for example, and is connected between one fixed contact 3 d provided in the electromagnetic switch 3 and the battery 4.
[0014]
Next, the operation procedure of the engine start system will be described based on the flowchart shown in FIG.
Step 10 ... When the IG key 5 is inserted into the ST terminal 5a, a start signal is input to the ECU 2 and the ECU 2 is activated.
Step20 ... Starter relay 7 is turned on. The starter relay 7 includes a relay coil 7a connected to the ST terminal 5a and a relay switch 7b provided between the battery 4 and the exciting coil 3a. When the relay coil 7a is energized, the relay switch 7b Turns on.
[0015]
Step 30: When the relay switch 7b is turned on, the excitation coil 3a of the electromagnetic switch 3 is energized from the battery 4 and the plunger 3b is attracted.
Step 40: By the movement of the plunger 3b, the movable contact 3c provided in the plunger 3b comes into contact with the set of fixed contacts 3d, and the energization circuit of the starting motor 1 is closed. As a result, energization of the starting motor 1 from the battery 4 via the control element 6 is started.
[0016]
Step 50: The control start time for controlling the applied voltage of the starting motor 1 is determined based on the external signal. For example, as shown in FIG. 3, the predetermined time Δt is detected after the engine control signal (ignition signal, injection signal, crank angle signal, etc.) or the fluctuation timing (maximum value or minimum value) of the energization current of the starting motor 1 is detected. It is determined whether or not it has elapsed. When the determination result is YES, the process proceeds to Step 60, and when the determination result is NO, Step 50 is repeatedly executed until the predetermined time Δt elapses.
[0017]
As shown in FIG. 4, this control start time is the rotation of the pinion gear and the ring gear when the engine speed decreases due to engine load fluctuation during cranking (the process of moving the piston from bottom dead center to top dead center). From the speed difference, the pinion gear is set slightly before the time when the tooth surface of the pinion gear collides with the tooth surface of the ring gear (A point where the engine speed and the starter speed in the figure intersect). Note that the timing at which the tooth surface of the pinion gear collides with the tooth surface of the ring gear can be estimated from the above-described engine control signal or the fluctuation timing of the energization current of the starter motor 1, so that the gear collision can be achieved by appropriately setting the predetermined time Δt. Control can be started slightly before the time.
[0018]
Step 60 ... Control the applied voltage of the starting motor 1. Specifically, the applied voltage of the starting motor 1 is lowered so that the difference in rotational speed between the pinion gear and the ring gear is reduced.
Step70 ... The engine is judged to start with an external signal.
When the determination result is YES, the process proceeds to Step 80, and when the determination result is NO, Step 70 is repeatedly executed until the engine start is confirmed.
Step80 ... Turn off the starter relay 7 and stop energizing the electromagnetic switch 3.
Step 90: Since the plunger 3b is pushed back to the original position by stopping the energization of the electromagnetic switch 3, the movable contact 3c is detached from the set of fixed contacts 3d to open the energization circuit of the starter motor 1, thereby starting motor 1 The power supply to is stopped.
[0019]
(Effects of the first embodiment)
The engine starting system of the present embodiment controls the applied voltage of the starting motor 1 to be lowered before the tooth surface of the pinion gear collides with the tooth surface of the ring gear. As a result, the starter rotational speed decreases as shown by the broken line graph in FIG. 4, so that the rotational speed difference between the pinion gear and the ring gear is reduced. As a result, the tooth surface of the pinion gear softly touches the tooth surface of the ring gear, so that the impact force at the time of gear contact can be relaxed, and the collision noise between the gears can be reduced, and damage to the pinion gear and ring gear can be prevented.
[0020]
(Second embodiment)
In this embodiment, the control start timing of the starter motor 1 is set to the initial stage where the engine speed increases (immediately after the piston passes the top dead center), and the starter motor speed is made to follow the engine speed. 1 is an example of controlling the applied voltage of 1.
Specifically, by increasing the applied voltage of the starting motor 1 at the initial stage when the engine speed increases, the starter speed increases so as to follow the engine speed as shown by the broken line graph in FIG. And the rotational speed difference between the ring gear becomes smaller. As a result, when the tooth surface of the pinion gear hits the tooth surface of the ring gear while the engine speed is decreasing (point A in the figure), the impact force is relieved, so the collision noise between the gears can be reduced. And damage to the pinion gear and the ring gear can be prevented.
[Brief description of the drawings]
FIG. 1 is an electric circuit diagram of an engine start system.
FIG. 2 is a flowchart showing an operation procedure of the embodiment.
FIG. 3 is a time chart showing an external signal and a start timing of control of the starting motor.
FIG. 4 is a graph showing changes in engine speed and starter speed (first embodiment).
FIG. 5 is a graph showing changes in engine speed and starter speed (second embodiment).
[Explanation of symbols]
1 starter motor 2 ECU (voltage control means)
6 Control elements (voltage control means)

Claims (3)

回転力を発生する始動モータとエンジン始動時にリングギヤに噛み合うピニオンギヤとを具備し、前記始動モータの回転力を前記ピニオンギヤから前記リングギヤに伝達してエンジンを始動するスタータと、
前記始動モータの印加電圧を制御する電圧制御手段とを有するエンジン始動システムであって、
前記電圧制御手段は、前記エンジンのピストンが下死点を過ぎてエンジン回転数が低下する過程で、前記ピニオンギヤと前記リングギヤとの回転速度差により前記ピニオンギヤの歯面が前記リングギヤの歯面に衝突する前に、前記ピニオンギヤと前記リングギヤとの回転速度差が小さくなる様に前記始動モータの印加電圧を下げることを特徴とするエンジン始動システム。A starter that generates a rotational force and a pinion gear that meshes with a ring gear when the engine is started; a starter that transmits the rotational force of the starter motor from the pinion gear to the ring gear and starts the engine;
An engine start system having voltage control means for controlling an applied voltage of the start motor,
The voltage control means is configured such that a tooth surface of the pinion gear collides with a tooth surface of the ring gear due to a difference in rotational speed between the pinion gear and the ring gear in a process in which the piston speed of the engine passes the bottom dead center and the engine speed decreases. Before starting, an engine starting system is characterized in that an applied voltage of the starting motor is lowered so that a difference in rotational speed between the pinion gear and the ring gear is reduced. 回転力を発生する始動モータとエンジン始動時にリングギヤに噛み合うピニオンギヤとを具備し、前記始動モータの回転力を前記ピニオンギヤから前記リングギヤに伝達してエンジンを始動するスタータと、
前記始動モータの印加電圧を制御する電圧制御手段とを有するエンジン始動システムであって、
前記電圧制御手段は、前記エンジンのピストンが上死点を過ぎてエンジン回転数が上昇する時に、前記ピニオンギヤと前記リングギヤとの回転速度差が小さくなる様に前記始動モータの印加電圧を上げることを特徴とするエンジン始動システム。A starter that generates a rotational force and a pinion gear that meshes with a ring gear when the engine is started; a starter that transmits the rotational force of the starter motor from the pinion gear to the ring gear and starts the engine;
An engine start system having voltage control means for controlling an applied voltage of the start motor,
The voltage control means increases the applied voltage of the starter motor so that the difference in rotational speed between the pinion gear and the ring gear becomes small when the engine speed increases after the piston of the engine passes top dead center. An engine start system that is characterized. 請求項１または２に記載したエンジン始動システムにおいて、
前記電圧制御手段は、前記始動モータの印加電圧を制御する制御開始時期を、点火信号、噴射信号、クランク角信号のエンジン制御信号、または前記始動モータに通電される電流の変動時期に基づいて決定することを特徴とするエンジン始動システム。The engine start system according to claim 1 or 2,
It said voltage control means, the control start timing for controlling the voltage applied to the starter motor, ignition signal, injection signal, based on the change timing of the current applied engine control signal No. crank SumiShin or the starter motor, An engine start system characterized by determining.
JP2001332103A 2001-10-30 2001-10-30 Engine start system Expired - Fee Related JP3942401B2 (en)

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JP2001332103A JP3942401B2 (en) 2001-10-30 2001-10-30 Engine start system
DE10249381.2A DE10249381B4 (en) 2001-10-30 2002-10-23 An engine starter system

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US11408326B2 (en) * 2018-07-12 2022-08-09 Briggs & Stratton, Llc Internal combustion engine with electric starting system

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JP4376215B2 (en) * 2005-08-05 2009-12-02 株式会社デンソー Engine starting device and engine starting method
DE102006011644A1 (en) 2006-03-06 2007-09-13 Robert Bosch Gmbh Device having a first gear part for meshing in a second gear part, in particular starting device with a pinion for meshing in a ring gear of an internal combustion engine and method for operating such a device
JP4636199B2 (en) 2008-10-04 2011-02-23 株式会社デンソー Engine automatic stop / start control device
JP6036085B2 (en) * 2012-03-15 2016-11-30 日産自動車株式会社 Engine starter
WO2016133129A1 (en) * 2015-02-18 2016-08-25 株式会社デンソー Engine starter device

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IT1249838B (en) * 1991-10-15 1995-03-28 Magneti Marelli Spa STARTING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE.
DE19811176A1 (en) * 1997-10-11 1999-04-15 Bosch Gmbh Robert Control circuit for starter motor in vehicle

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Publication number Priority date Publication date Assignee Title
US11408326B2 (en) * 2018-07-12 2022-08-09 Briggs & Stratton, Llc Internal combustion engine with electric starting system
US20220381176A1 (en) * 2018-07-12 2022-12-01 Briggs & Stratton, Llc Internal combustion engine with electric starting system
US11639681B2 (en) * 2018-07-12 2023-05-02 Briggs & Stratton, Llc Internal combustion engine with electric starting system

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