• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    PURPOSE: An apparatus for guiding advancement and retardation of engine for an enhanced startability of compressed ignition type internal combustion engine is provided to reduce a white smoke and achieve an improved fuel efficiency by decreasing pre-heating and post-heating time of the engine. CONSTITUTION: An apparatus in a timer having a fly weight holder fixed to a cam shaft of an injection pump, and a fly weight, timer spring, journal and bearing pin connected to each other within a timer case fixed to the fly weight holder, the apparatus comprising an injection time adjusting lever(1) connected to the cam shaft so as to adjust the injection time, a fly weight(4) connected to the lever(1) via a connection member(6), draft springs(2, 5) of which one ends are fixed to the upper and lower portions of the lever(1) and other ends are fixed within a housing, supporting spring(3) of which one end is fixed to an upper portion of the fly weight(4) and other end is fixed within the housing, thus the injection time of internal combustion engine is controlled via the lever(1).
    公开号:KR20000046006A
    申请号:KR1019980062666
    申请日:1998-12-31
    公开日:2000-07-25
    发明作者:김영환
    申请人:추호석；대우중공업 주식회사；
    IPC主号:
    专利说明:

    Advancement and tectonic induction device for improving startability of compression ignition type internal combustion engine
    The present invention relates to a timer of a compression ignition type internal combustion engine, and in particular, the induction and perception induction for improving the startability of the compression ignition type internal combustion engine, which reduces the white smoke and improves the startability of the engine by shortening the preheating and postheating time of the engine. Relates to a device.
    In general, in a diesel engine, which is a representative type of a compression ignition type internal combustion engine, the pressure generated in the plunger chamber by the driving of the injection pump becomes a pressure wave and is transferred into the injection pipe at high speed to reach the injection nozzle, which is injected from the injection nozzle. The fuel is ignited and burned after passing the ignition delay period, but the time that the pressure wave is transmitted in the injection pipe does not change much by the change of the rotational speed of the engine, but the crank angle of the ignition delay period increases as the speed increases. That is, the high speed side becomes shorter in the ignition time, but becomes larger in view of the crank angle, so the crank angle that rotates from the pressure generation time of the plunger chamber to the ignition becomes larger as the speed becomes higher.
    Therefore, it is necessary to accelerate the injection time at high speed, that is, the time when pressure is generated in the injection pump, with respect to the crank angle of the engine so that the ignition time is constant at all rotation angles to achieve the most suitable combustion state.
    As such, the timer 107 is used to change the phase between the engine and the drive shaft of the injection pump to speed up the injection timing when the rotational speed increases and to slow down the injection timing when the speed drops. As shown in Figs. 4 to 9, two fly weights 102 are attached and one hole is drilled to each other, so that the bearing pins 101a of the fly weight holder 101 are fitted in the holes. The flyweight 102 is a curved surface (102a) is formed to make a constant advance.
    A journal 104a is in contact with the curved surface 102a, and a timer spring 103 is fitted between the journal 104a and the bearing pin 101a through a spring sheet. The parts are embedded in the timer case 105, which is screwed into the flyweight holder 101, which is fixed to the camshaft of the injection pump 106, while The flange 104 is attached to the end of the drive shaft of the engine is coupled to the coupling to transmit the rotation of the engine to the injection pump 106.
    Here, looking at the operation of the timer 107, the bearing pin (101a) transmits the driving force to the journal (104a) through the curved surface (102a) of the flyweight 102, the flyweight when the rotation of the engine faster The centrifugal force of 102 is gradually increased so that the flyweight 102 begins to spread out at a position where the driving torque of the injection pump 106 and the force of the timer spring 103 are balanced, and this position starts to be advanced. When the rotation is faster, the flyweight 102 opens to the outside so that the distance between the journal 104a and the bearing pin 101a is narrowed by a predetermined interval t.
    For this reason, the phase difference between the engine side and the injection pump 106 becomes small, and the cam shaft of the injection pump 106 advances in the rotational direction with respect to the drive shaft of the engine.
    On the other hand, since the advance characteristic is determined by the shape of the curved surface 102a of the flyweight 102, it does not become a very complicated characteristic and exhibits a characteristic of advancing almost linearly with respect to rotation.
    However, in recent years, the interest on the environment has increased, and the regulation on the exhaust gas of the compression ignition type internal combustion engine is being strengthened. In particular, the regulation of the exhaust gas is a mode-specific regulation and when idle. Is also subject to regulation.
    On the other hand, the NO X exhaust gas containing the NOx component to increase the injection timing, which allows the durability of the internal combustion engine since the closely related is the one quantity NO X when the advancing increase in the injection timing fuel economy and output stability and injection timing Although it is advantageous to do so, the timing of injection is usually delayed according to the emission gas regulation.
    Since the perception of the injection timing may cause deterioration of fuel efficiency, output deterioration, starting deterioration, and white smoke, there is a problem of using a starting aid or increasing the preheating and postheating time of the internal combustion engine in winter. .
    Therefore, the present invention has been invented to solve the above problems, to advance the injection timing of the internal combustion engine before starting, and to be perceived after starting, to reduce the amount of emission gas by mode and the NO x amount of the idle combustion engine of the internal combustion engine It is an object of the present invention to provide an advance and perceptual induction apparatus for improving startability of a compression ignition type internal combustion engine that can improve startability and shorten preheating and postheating time to reduce white smoke and exhaust gas.
    1 is a side view showing a part of an internal combustion engine according to the present invention;
    FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1, and is a cross-sectional view of the advance and perceptual induction apparatus in the pre-start state of the internal combustion engine;
    3 is a cross-sectional view of the advancing and perceptual induction device of the internal combustion engine after starting;
    4 is a graph showing a progress diagram of a timer according to the present invention;
    5 is a side view of an internal combustion engine showing a position where a timer is mounted, according to the prior art;
    6 is a perspective view showing a component of a timer according to the prior art;
    7 is a prior art, cross-sectional view taken along line B-B of FIG.
    8 is a conventional cross-sectional view of a timer before starting an internal combustion engine;
    Fig. 9 is a sectional view of a timer after starting the internal combustion engine in the prior art.
    1: Injection timing adjusting lever 2,5: Traction spring
    3: support spring 4: fly weight
    6 connection member 7 advance and perception induction device
    The present invention for achieving the above object, the injection timing adjustment lever is connected to the cam shaft to adjust the injection timing, the fly timing is connected via the injection timing adjustment lever and the connecting member, the injection timing adjustment It is composed of traction springs, one end of which is respectively fixed to the upper and lower parts of the lever, and the other end of which is respectively fixed to the housing, and the support spring of which one end is fixed to the upper portion of the flyweight and the other end is fixed to the housing. Through the adjustment lever, the injection timing of the internal combustion engine is advanced before starting and late after starting.
    Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
    1 is a side view showing a part of the internal combustion engine according to the present invention and FIG. 3 is a cross-sectional view of a forward and latent induction apparatus in a post-start state of the internal combustion engine and FIG. 3 is a post-start state of the internal combustion engine of FIG. 4 is a graph showing a progress diagram of a timer according to the present invention. The present invention relates to a flyweight holder fixed to a cam shaft of an injection pump, and a timer case fixed to the flyweight holder. In a timer of an internal combustion engine in which a flyweight, a timer spring, a journal, a bearing pin, and the like are connected to each other, an injection timing adjustment lever (1) connected to the camshaft to adjust the injection timing, the injection timing adjustment lever (1) and the flyweight (4) connected via the connecting member (6), one end is fixed to the upper and lower portions of the injection timing adjustment lever (1) and the other end is lower The traction spring is secured in each gong (2,5), on top of the fly weights 4, one end is fixed and the other one is composed of the support spring 3 is fixed in the housing.
    Accordingly, as shown in FIG. 2, the traction springs 2 and 5 pull the injection timing adjustment lever 1 in the forward direction in the pre-start state of the internal combustion engine to maintain a constant forward angle a. .
    Here, since the flyweight 4 is a state before the start of the internal combustion engine, the centrifugal force does not act so that the force cannot be applied to the support spring 3 and the connecting member 6. Only 2 and 5 exert a force to pull the injection timing adjusting lever 1 in the forward direction.
    On the other hand, when starting the internal combustion engine, as shown in Figure 3, the flyweight (4) is rotated while the centrifugal force acts to pull the connecting member 6, the injection timing adjustment lever connected to the connecting member (6) (1) is pulled to maintain a constant crust (b). At this time, the centrifugal force acting on the flyweight 4 is greater than the compression force of the traction springs 2 and 5, and the support spring 3 has a constant compression force so that when the centrifugal force acts on the flyweight 4 It ensures the stability of operation.
    And as shown in Figure 4, the built-in timer and the perception induction device 7 according to the present invention, since the injection timing is maintained before the start of the internal combustion engine, it brings a certain improvement in startability compared to the conventional timer In addition, it can be seen that the operating range exhibiting such an advance characteristic operates only before the start, that is, before the idle section of the compression ignition type internal combustion engine.
    Accordingly, it is possible to reduce the amount of emission gas in the idle mode when the emission gas regulation for each mode.
    As described above, according to the present invention, the injection timing adjustment lever is configured to advance the injection timing of the internal combustion engine before starting and to sense it after starting, to improve the startability of the compression ignition type internal combustion engine, and to produce white smoke in winter. On the other hand, the preheating and postheating time can be shortened.
    权利要求:
    Claims (1)
    [1" claim-type="Currently amended] In a timer of an internal combustion engine in which a fly weight holder fixed to a cam shaft of an injection pump and a fly weight, a timer spring, a journal and a bearing pin are connected to each other in a timer case fixed to the fly weight holder,
    An injection timing adjusting lever 1 connected to the camshaft to adjust the injector, a flyweight 4 connected through the injection timing adjusting lever 1 and the connecting member 6, and the injection timing adjusting lever ( Towing springs 2 and 5 having one end fixed to the upper and lower portions of 1) and the other end fixed to the housing respectively, one end fixed to the upper portion of the flyweight 4 and the other end fixed to the housing. It is composed of a spring (3), through the injection timing adjustment lever (1) is an advance and perception induction apparatus for improving the startability of the compression ignition type internal combustion engine, characterized in that it is possible to adjust the injection timing.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1998-12-31|Application filed by 추호석, 대우중공업 주식회사
    1998-12-31|Priority to KR1019980062666A
    2000-07-25|Publication of KR20000046006A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019980062666A|KR20000046006A|1998-12-31|1998-12-31|Apparatus for guiding advancement and retardation of engine for enhanced startability of compressed ignition type internal combustion engine|
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