Fuel injection pump

Patent metadata

Field	Value
Publication number	US-10443554-B2
Application number	US-201415025938-A
Country	US
Kind code	B2
Filing date	Sep 10, 2014
Priority date	Sep 30, 2013
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

A fuel injection pump includes a plunger, a plunger barrel which supports the plunger, a body which houses the plunger and the plunger barrel, a plate which covers an opening formed on the body, a control lever turnably attached near the plate, and an adjuster bolt which abuts against the control lever to restrict turn of the control lever and is supported by a stay disposed on the plate.

First claim

The invention claimed is:

1. A fuel injection pump comprising:
a plunger;
a plunger barrel configured to support the plunger;
a body configured to house the plunger and the plunger barrel;
a plate configured to cover an opening formed on the body;
a control lever turnably attached near the plate and disposed on an external side of the body;
a set bolt configured to abut against the control lever to restrict turn of the control lever in a rotation direction, the set bolt is further configured to define a first value of a lower limit of a fuel pressure feed amount; and
an adjuster bolt supported by a stay disposed on the plate, the adjuster bolt configured to be adjustable to abut against the control lever to restrict turn of the control lever in the rotation direction, the adjuster bolt is adjustable to establish a second value of the lower limit of the fuel pressure feed amount that is greater than the first value.

2. The fuel injection pump according to claim 1 , wherein the stay is formed separately from the plate and fixed to the plate.

3. The fuel injection pump according to claim 1 , wherein the stay includes a part which is perpendicular to a plane of the plate.

4. The fuel injection pump according to claim 1 , wherein
the control lever is formed by punching, and
the adjuster bolt abuts against a shear plane of the control lever.

5. The fuel injection pump according to claim 2 , wherein
the control lever is formed by punching, and
the adjuster bolt abuts against a shear plane of the control lever.

6. The fuel injection pump according to claim 3 , wherein
the control lever is formed by punching, and
the adjuster bolt abuts against a shear plane of the control lever.

7. The fuel injection pump according to claim 1 , wherein the control lever is configured to be operated by a user.

8. The fuel injection pump according to claim 1 , wherein the plate is configured to be removably coupled to the body to enable assembly and disassembly of a fuel pressure-feed mechanism that includes the plunger and the plunger barrel.

9. The fuel injection pump according to claim 1 , wherein the first value comprises an absolute minimum value of the lower limit.

10. The fuel injection pump according to claim 1 , wherein, the adjuster bolt is configured to be adjustable between:
a first position in which turn of the control lever in the rotation direction is restricted by the set bolt; and
a second position in which turn of the control lever in the rotation direction is restricted by the adjuster bolt.

11. The fuel injection pump according to claim 1 , wherein:
the set bolt is configured to contact the control lever at a first location on the control lever; and
the adjuster bolt is adjustable to contact the control lever at one or more locations of the control lever, each of the one or more locations distinct from the first location.

12. The fuel injection pump according to claim 11 , wherein:
an end of the set bolt is configured to contact the control lever at the first location on the control lever; and
an end of the adjuster bolt is configured to contact the control lever at the one or more locations of the control lever.

13. The fuel injection pump according to claim 12 , wherein the end of the set bolt extends, in a first direction, farther than the end of the adjuster bolt.

14. The fuel injection pump according to claim 12 , wherein the control lever is configured to prohibit the end of the adjuster bolt to extend farther than the end of the set bolt in a direction toward the control lever.

15. The fuel injection pump according to claim 12 , wherein the first value comprises an absolute minimum value of the lower limit.

16. The fuel injection pump according to claim 1 , wherein a position of the set bolt is fixed and non-adjustable.

17. The fuel injection pump according to claim 1 , further comprising a nut configured to enable adjustment of the adjuster bolt.

Assignees

• Yanmar Co Ltd

Inventors

• Nankou Masaki
• Iwano Ryota
• Takagishi Isao

Classifications

• F02M59/28

  Mechanisms therefor · CPC title

• F02D2001/0095

  Mounting of control means with respect to injection apparatus or the engine · CPC title

• F02M59/361 Primary

  Valves being actuated mechanically · CPC title

• F02M59/04

  characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft {or swash-plate type pumps (with rotary valve F02M59/362)} · CPC title

• F02D2001/007

  Means for adjusting stops for minimum and maximum fuel delivery · CPC title