公开(公告)号：US4509491A

公开(公告)日：1985-04-09

申请号：US547949

申请日：1983-11-02

申请人： Hisatsugu Kawatei

发明人： Hisatsugu Kawatei

IPC分类号： F02D1/18 ,  F02M37/00 ,  F02M41/12 ,  F02M59/20

CPC分类号： F02M41/128 ,  F02D1/183

摘要： An overflow valve is provided in a distributor-type fuel injection pump, for returning excess fuel from the suction chamber of the pump to a lower pressure zone in the pump. The valve comprises a passage communicating with the suction chamber, a check valve arranged within the passage and operable in response to the suction chamber pressure for closing and opening the same passage, and throttle forming means formed by the passage and the check valve. The valve body of the check valve has a pressure-applying surface on which the suction chamber pressure acts in the valve-opening direction, and which assumes a larger surface area when the valve is in an open position than when it is in a closed position. The check valve is closed at the start of the engine to increase the suction chamber pressure so that the timing device of the fuel injection pump acts to advance the fuel injection timing.

摘要翻译： 溢流阀设置在分配式燃料喷射泵中，用于将多余的燃料从泵的吸入室返回到泵中的较低压力区。 阀包括与抽吸室连通的通道，设置在通道内的止回阀，其响应于用于关闭和打开相同通道的吸入室压力而操作，以及由通道和止回阀形成的节气门形成装置。 止回阀的阀体具有压力施加表面，吸入室压力沿阀门打开方向作用，并且当阀处于打开位置时比其处于关闭位置更大的表面积 。 在发动机起动时止回阀关闭以增加吸气室压力，使得燃料喷射泵的定时装置用于提前燃料喷射正时。

公开(公告)号：US4449500A

公开(公告)日：1984-05-22

申请号：US385607

申请日：1982-06-07

申请人： Hisatsugu Kawatei ,  Hidetoshi Saito ,  Hisashi Nakamura

发明人： Hisatsugu Kawatei ,  Hidetoshi Saito ,  Hisashi Nakamura

IPC分类号： F02D1/02 ,  F02D1/06 ,  F02D1/14 ,  F02M59/44 ,  F02D23/02

CPC分类号： F02D1/14 ,  F02D1/065 ,  F02M59/447

摘要： A diaphragm (38) controls a position of a control sleeve (14) relative to a plunger or piston (16) in response to a pressure differential between a pressure chamber (42) and a control chamber (46) which are defined by the diaphragm (38). The pressure chamber (42) is communicated to an atmospheric pressure or a boost pressure while the control chamber (46) is selectively communicated to a source of vacuum supply through a first check valve (62) and to the atmosphere through a second check valve (58). The first and second check valves open when the pressure inside the control chamber is higher and lower than a reference level, respectively, thereby maintaining the pressure within the control chamber (46) substantially at the reference level to promote an accurate control of the control sleeve (14).

摘要翻译： 响应于由隔膜限定的压力室（42）和控制室（46）之间的压力差，隔膜（38）相对于柱塞或活塞（16）控制控制套筒（14）的位置 （38）。 压力室42连通到大气压或增压压力，而控制室46通过第一止回阀62选择性地连通到真空源，并通过第二止回阀（大气） 58）。 当控制室内的压力分别高于和低于基准水平时，第一和第二止回阀打开，从而将控制室（46）内的压力基本保持在参考水平，以促进控制套筒的精确控制 （14）。

公开(公告)号：US4489697A

公开(公告)日：1984-12-25

申请号：US468652

申请日：1983-02-22

申请人： Hisatsugu Kawatei

发明人： Hisatsugu Kawatei

IPC分类号： F02D1/18 ,  F02M41/12 ,  F02M59/20

CPC分类号： F02M41/128 ,  F02D1/183 ,  Y10T137/7738

摘要： In a distributor type fuel injection pump for use with an internal combustion engine, which is equipped with an injection timing control device operable in response to oil pressure within a pressure oil chamber, which is variable as a function of the rotational speed of the engine, an overflow valve is provided, which is closed at the start of the engine when the oil pressure within the pressure oil chamber is low, and is opened during subsequent operation of the engine to cause escape of the above oil pressure to a lower pressure zone in the pump, to thereby cause the above injection timing control device to obtain an advance in the fuel injection timing.

摘要翻译： 在与内燃机一起使用的分配器型燃油喷射泵中，其配备有可响应于作为发动机的转速的函数而变化的压力油室内的油压而可操作的喷射正时控制装置， 提供了一种溢流阀，当压力油室内的油压低时，在发动机起动时闭合，并且在随后的发动机运转期间打开以使上述油压溢出到较低压力区域 从而使上述喷射正时控制装置获得燃料喷射正时的提前。