JPS6155140U

JPS6155140U -

Info

Publication number: JPS6155140U
Application number: JP13936784U
Authority: JP
Priority date: 1984-09-17
Filing date: 1984-09-17
Publication date: 1986-04-14

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係るデイーゼルエ
ンジンの燃料噴射時期制御装置の断面図、第２図
は従来の分配型燃料噴射ポンプの断面図、第３図
は圧電素子としてのセラミツクスアクチユエータ
の製造方法のフローチヤート、第４図は圧電素子
の入力電圧と変化量の関係図、第５図は圧電素子
の応答性を示す特性図、第６図は拡大手段の断面
図、第７図は従来のエンジン回転数とタイマスト
ロークとの関係図、第８図は本考案によるエンジ
ン回転数とタイマストロークとの関係図、第９図
は本考案によるレバー開度とタイマストロークと
の関係図、である。１……燃料噴射ポンプ、１０……タイマピスト
ン、１１……タイマハウジング、１２……タイマ
ピストン高圧室、１５……低圧室、１６……タイ
マスプリング、１８……ベローズ、２０……タイ
マカバー、２１……圧電素子、２４……拡大手段
、２６，２８……ピストン、２９……液体、３３
……コンピユータ、３６……エンジン回転数信号
、３７……エンジン負荷信号、３８……水温信号
。 FIG. 1 is a sectional view of a fuel injection timing control device for a diesel engine according to an embodiment of the present invention, FIG. 2 is a sectional view of a conventional distribution type fuel injection pump, and FIG. 3 is a sectional view of a ceramic actuator as a piezoelectric element. FIG. 4 is a diagram showing the relationship between the input voltage of the piezoelectric element and the amount of change, FIG. 5 is a characteristic diagram showing the response of the piezoelectric element, FIG. 6 is a sectional view of the enlarging means, and FIG. Figure 8 is a diagram showing the relationship between the conventional engine speed and timer stroke, Figure 8 is a diagram showing the relationship between engine speed and timer stroke according to the present invention, and Figure 9 is a diagram showing the relationship between lever opening and timer stroke according to the present invention. , is. DESCRIPTION OF SYMBOLS 1... Fuel injection pump, 10... Timer piston, 11... Timer housing, 12... Timer piston high pressure chamber, 15... Low pressure chamber, 16... Timer spring, 18... Bellows, 20... Timer cover, 21...Piezoelectric element, 24...Enlargement means, 26, 28...Piston, 29...Liquid, 33
...Computer, 36...Engine speed signal, 37...Engine load signal, 38...Water temperature signal.

Claims

[Scope of utility model registration request]

The timer piston, which is slidably inserted into the timer housing, is balanced by the high-pressure side fuel pressure of the fuel injection pump and a timer spring that biases the timer piston in the direction of injection delay, thereby controlling the injection timing according to the fuel pressure. In the fuel injection timing control device for a diesel engine equipped with a timer, a piezoelectric element that expands and contracts in accordance with an input voltage is provided at a position opposite to the timer piston of the timer spring, and the piezoelectric element and the timer spring are connected together. 1. A fuel injection timing control device for a diesel engine, characterized in that an enlargement means is provided between the ends of the piezoelectric element and the expansion means for increasing the amount of expansion and contraction of the piezoelectric element and transmitting the expanded amount to the timer spring side.