Patent ID: 8555859

Claim:
A circuit arrangement for actuating at least one injection valve of an internal combustion engine, the circuit arrangement comprising: a supply potential connection for carrying a first voltage; a reference-ground potential connection; at least one cylinder coil having a first coil connection and a second coil connection, wherein a voltage is applied to said first coil connection of said cylinder coil for operating an associated injection valve; a controllable voltage doubling circuit configured to produce from the first voltage a second voltage that is higher than the first voltage, said voltage doubling circuit having a first input connected to said supply potential connection, said voltage doubling circuit including a second input connected to said reference-ground potential connection, said voltage doubling circuit including two semiconductor elements connected in series with each other and connected between said supply voltage connection and said reference-ground potential connection, each one of said two semiconductor switching elements having a control connection, said voltage doubling circuit including a first output, a second output, a first diode, a first capacitor, a second capacitor, a second diode, a first node connected between said two semiconductor switching elements, and a second node, said first diode, said first capacitor, said second capacitor, and said second diode connected in series to thereby form a series circuit having a center tap at said second node said series circuit connected between said supply potential connection and said reference-ground connection, said voltage doubling circuit including a first output formed by a connecting point between said first diode and said first capacitor, said voltage doubling circuit including a second output formed by a connecting point between said second capacitor and said second diode, and said voltage doubling circuit including a first controllable semiconductor element connecting said first output to said cylinder coil; an actuation circuit connected to said control connection of each one of said two semiconductor switching elements; a first current measurement device connecting said second coil connection of said at least one cylinder coil to said reference-ground potential connection; and a component selected from the group consisting of: said first current measuring device and a fourth semiconductor switching element being different from said first current measurement device, said component selectively breaking a connection between said second coil connection and said reference-ground potential connection.