초록 ▼

A control for an injection system of a multicylinder internal combustion engine has a high pressure pump connected to a distributor element provided with outlet openings from which branch lines lead separately to groups of injection valves. The distributor element has first and second spring biased

A control for an injection system of a multicylinder internal combustion engine has a high pressure pump connected to a distributor element provided with outlet openings from which branch lines lead separately to groups of injection valves. The distributor element has first and second spring biased pistons that are operable to block selectively fuel to the branch lines, each of the pistons having a throttle point situated therein. When a major leak develops downstream from the distributor element, the branch line in which the leak has occurred is automatically shut off by the associated piston in the distributor element, due to the imbalance in pressure which results. When a minor leak develops, one of the branch lines is automatically closed by a control unit shutting off the injection valves associated with the other branch line, while the high pressure pump continues to deliver for at least one operating cycle. The other branch line and associate injection valves operate once again, with an adjustment of the fuel volume supplied when elimination of the leak is detected. When, however, it is determined that the leak still exists, injection valves that have been shut off are activated once again without delivering new fuel, and one branch line and associated injection valves continues to operate while adjusting the amount of fuel delivered.

대표청구항 ▼

[ What is claimed is:] [1.] Control for an injection system of a multicylinder internal combustion engine having at least one high-pressure pump to deliver fuel to injection valves, a fuel inlet opening connected with the high-pressure pump through a high-pressure line, a distributor element provide

[ What is claimed is:] [1.] Control for an injection system of a multicylinder internal combustion engine having at least one high-pressure pump to deliver fuel to injection valves, a fuel inlet opening connected with the high-pressure pump through a high-pressure line, a distributor element provided with outlet openings from which at least first and second branch lines lead separately to the injection valves, pressure sensors for sensing pressure at a plurality of points within the system, and a control unit which monitors pressure signals emitted by said sensors and controls said injection valves and said distributor element in response thereto, wherein:said distributor element has first and second pistons that are operable to block selectively a flow of fuel to said first and second branch lines, each of said pistons having a throttle opening therein;when a major leak develops in an area located downstream from the distributor element, the fuel supply from the distributor element to the branch line with the leak is automatically shut off;when a minor leak develops, a selected one of said first and second branch lines is automatically closed by shutting off injection valves associated with the other branch line while the high-pressure pump continues to deliver for at least one operating cycle, the other branch line and associated injection valves being operated once again with an adjustment of the fuel volume supplied, when elimination of the leak is detected, and when it is determined that there is still a leak, injection valves that have been shut off are activated once again without delivering any new fuel, said selected one branch line and associated injection valves continuing to operate while adjusting the amount of fuel delivered.