Abstract: A fuel injection pump includes a cam shaft (7) driving a plunger (4) and a feed pump (3) assembled therein for feeding fuel pressured by the plunger (4). A flange part (52) projecting radially is provided on the cam shaft (7), an internal gear (41) transmits a power to the feed pump (7), and a housing member (8c) rotatably supports the cam shaft (7) on the free end opposite to the end part of the driven side of the cam shaft (7). A housing member (8c) rotatably supporting the cam shaft (7) through a radial bearing (12) is held between the flange part (52) and the internal gear (41) so as to allow adjustment of the axial position of the cam shaft (7), so that adjustment of the axial position of the cam shaft is substituted for the existing member assembled into the pump. Thus, an axial gap due to a deterioration of durability of the bearing is eliminated to be adjusted so as to facilitate the assembly, reduce the number of parts, and reduce the size of the injection pump.

Abstract: An object of the present invention is to provide an accumulator fuel injection system comprising a pressure increasing unit 7 and a pressure increasing common rail 6, in which leaked fuel is recirculated from a high pressure side to a low pressure side, and which is capable of reducing the amount of fuel that must be delivered under pressure by a low pressure pump 3. The focus of the present invention is to return high pressure leaked fuel to between the low pressure pump 3 and a high pressure pump 5.

Abstract: An object of the present invention is to provide an accumulator fuel injection system comprising a pressure increasing unit 7 and a pressure increasing common rail 6, in which leaked fuel is recirculated from a high pressure side to a low pressure side, and which is capable of reducing the amount of fuel that must be delivered under pressure by a low pressure pump 3. The focus of the present invention is to return high pressure leaked fuel to between the low pressure pump 3 and a high pressure pump 5.

Abstract: There is provided a fuel supply pump that is capable of keeping the function of an outlet valve thereof normal over a long time period even when a low lubricity fuel is used. The fuel supply pump has an outlet valve slidably inserted in an insertion hole formed in a valve body, for opening and closing the insertion hole. The outlet valve is coated by CVD coating.

Abstract: A high-pressure fuel feed pump force-feeding fuel to a common rail for storing high-pressure fuel, comprising a fuel force-feeding means for force-feeding fuel and a fuel oil quantity regulating means for regulating the amount of fuel oil flowing into a compression chamber, the fuel oil quantity regulating means further comprising a fuel path leading the fuel sucked from a fuel tank to the compression chamber and a throttle valve installed in the fuel path and changing the cross-sectional area of the fuel path so as to vary the quantity of the fuel oil passing therethrough, wherein the throttle valve is slid in the direction generally perpendicular to the flowing direction of the fuel passing through the inside of the fuel path so that a valve disc regulating the fuel flow rate can be moved smoothly without being obstructing by a fluid pressure.

Abstract: A fuel injection pump, comprising a cam shaft (7) driving a plunger (4) and a feed pump (3) assembled therein for feeding fuel pressured by the plunger (4), wherein a flange part (52) projecting radially is provided on the cam shaft (7), an internal gear (41) transmitting a power to the feed pump (7), and a housing member (8c) rotatably supporting the cam shaft (7) on the side opposite to the end part of the driven side of the cam shaft (7), and a housing member (8c) rotatably supporting the cam shaft (7) through a radial bearing (12) is held between the flange part (52) and the internal gear (41) so as to adjust the axial position of the cam shaft (7), and then a function to adjust the axial position of the cam shaft is substituted for the existing member assembled into the pump, whereby an axial gap due to a deterioration of durability of the bearing is eliminated to be adjusted so as to facilitate the assembly, reduce the number of parts, and reduce the size of the injection pump.

Abstract: A fuel injection device, wherein a plurality of high-pressure fuel feed parts each comprising a supply pump part and fuel metering part are disposed, in parallel with each other, between a feed pump part sucking fuel from a fuel tank and a common rail so that the injection of a specified amount of fuel can be maintained even if one high-pressure pump fails, whereby, even if one high-pressure fuel feed parts stops, a common rail pressure can be maintained by the other high-pressure fuel feed part.

Abstract: In a fuel injection pump including a plunger barrel provided with a fuel pressure chamber, a plunger which reciprocates within this plunger barrel to take in fuel from a fuel reservoir chamber and deliver this fuel from the fuel pressure chamber under pressure, and a timing sleeve which is positioned between the plunger and the plunger barrel such that it slidably mates with the outside of this plunger, and on which a spill port is formed; a fuel injection pump is characterized by an impingement-cushioning cavity being formed on the surface of the inside wall of the plunger barrel in a position opposite the spill port of the timing sleeve along with the peripheral surface of the timing sleeve being formed in a certain shape corresponding to this impingement-cushioning cavity.

Abstract: A fuel injection pump includes a barrel mounted in a barrel mounting hole in a pump body. The barrel has a cylinder hole and a valve mounting hole which are coaxial with the barrel. The inner peripheral surface of the cylinder hole and the inner peripheral surface of said valve mounting hole are interconnected by an annular shoulder surface. A plunger is slidably received in the cylinder hole, and a delivery valve is mounted in the valve mounting hole. The delivery valve includes a valve seat, and a valve holder which is tightly threaded into the valve mounting hole, so that the valve seat is firmly held between the valve holder and the shoulder surface of the barrel. One end face of said valve seat is held in direct contact with the barrel shoulder surface under a high pressure.

Abstract: A fuel injection pump for an internal combustion engine, in which fuel drawn into a pressure chamber is pressure delivered by reciprocating motion of a plunger. A control sleeve slidably fitted on the plunger is axially moved by angular movement of a control rod to vary a prestroke of the plunger. The control rod is supported by a self-aligning bearing fixed in place by a tightening nut within one of a pair of fitting bores formed in a pump housing and a bush disposed within the other fitting bore.