Control arrangement, especially for diesel engine

Claim 2

A control device for automatically shutting off the fuel supply to a Diesel engine in response to the failure of an accessory thereof and comprising: electrically operable means adapted upon energization to shut off the supply of fuel to the engine, a component having an output connected to said electrically operable means and having at least two inputs, said component developing a signal at the output for energizing said electrically operable means when control signals are simultaneously supplied to the said inputs thereof, first signal supply means operated by said accessories and developing signals upon the failure of an accessory, first time delay means connected between said first signal supply means and a first of said inputs and operable in response to a signal of predetermined duration from said first signal supply means to supply a control signal to a first input of said component, second signal supply means operated by said engine and developing a signal in response to the engine reaching a predetermined speed, and second time delay means connected between said second signal supply means and a second input of said component and operable in response to a signal of a predetermined duration from said second signal supply means to supply a control signal to said second input of said component whereby said control device becomes effective only after said engine has reached said predetermined speed, said second signal supply means including an engine driven generator and a blocking relay in the engine starting system and both of which must supply signals to operate said second time delay means.

Claim 3

A control device according to claim 1 in which said second signal supply means comprises an engine driven generator means.

Claim 4

A control device according to claim 1 in which said first time delay means comprises a low impedance digital component and a high impedance timing element in series.

Claim 5

A control device according to claim 1 which includes means operated by the output from said component for making said first time delay means ineffective.

Claim 6

A control device according to claim 1 which includes means operated by the output from said component for maintaining said component in actuated condition after the engine slows down to below said predetermined speed.

Claim 7

A control device according to claim 1 in which said accessories comprise the cooling and lubricating system of the engine.

Claim 8

A control device for automatically shutting off the fuel supply to a Diesel engine in response to the failure of an accessory thereof and comprising: electrically operable means adapted upon energization to shut off the supply of fuel to the engine, a component having an output connected to said electrically operable means and having at least two inputs, said component developing a signal at the output for energizing said electrically operable means when control signals are simultaneously supplied to the said inputs thereof, first signal supply means operated by said accessories and developing signals upon the failure of an accessory, first time delay means connected between said first signal supply means and a first of said inputs and operable in response to a signal of predetermined duration from said first signal supply means to supply a control signal to a first input of said component, second signal supply means operated by said engine and developing a signal in response to the engine reaching a predetermined speed, and second time delay means connected between said second signal supply means and a second input of said component and operable in response to a signal of a predetermined duration from said second signal supply means to supply a control signal to said second input of said component whereby said control device becomes effective only after said engine has reached said predetermined speed, said component being a multiple input first Nor gate, said first time delay means comprising a first signal invertor connected to a first input of said first Nor gate, a first delayed signal invertor connected to said first signal invertor, a two input second Nor gate connected to said first delayed signal invertor, the first input of said second Nor gate being connected to the output of said second Nor gate, a two input third Nor gate connected to the second input of said second Nor gate, the first input of said third Nor gate being connected to said first signal supply means and via a resistor to said first signal supply means, said second time delay means comprising a second signal invertor connected to a second input of said first Nor gate, a second delayed signal invertor connected to said second signal invertor, a two input fourth Nor gate connected to said second delayed signal invertor, a two input fifth Nor gate connected to the first input of said fourth Nor gate, the second input of said fourth Nor gate being connected to the output of said first Nor gate, means connecting said second signal supply means to the first input of said fifth Nor gate and supplying a 1 signal thereto below a predetermined engine speed and a 0 signal thereto above said predetermined engine speed, and means connected to the second input of said fifth Nor gate and supplying a 1 signal thereto during the starting period of said engine.

Claim 9

A control device for automatically shutting off the fuel supply to a Diesel engine in response to the failure of an accessory thereof and comprising: electrically operable means adapted upon energization to shut off the supply of fuel to the engine, a component having an output connected to said electrically operable means and having at least two inputs, said component developing a signal at the output for energizing said electrically operable means when control signals are simultaneously supplied to the said inputs thereof, first signal supply means operated by said accessories and developing signals upon the failure of an accessory, first time delay means connected between said first signal supply means and a first of said inputs and operable in response to a signal of predetermined duration from said first signal supply means to supply a control signal to a first input of said component, second signal supply means operated by said engine and developing a signal in response to the engine reaching a predetermined speed, and second time delay means connected between said second signal supply means and a second input of said component and operable in response to a signal of a predetermined duration from said second signal supply means to supply a control signal to said second input of said component whereby said control device becomes effective only after said engine has reached said predetermined speed, said component being a multiple input first Nor gate, said first time delay means comprising a first signal invertor connected to a first input of said first Nor gate, a first delayed signal invertor connected to said first signal invertor, a two input second Nor gate connected to said first delayed signal invertor, the first input of said second Nor gate being connected to the output of said second Nor gate, a two input third Nor gate connected to the second input of said second Nor gate, the first input of said third Nor gate being connected to said first signal supply means and via a resistor to said first signal supply means, said second time delay means comprising a second signal invertor connected to a second input of said first Nor gate, a second delayed signal invertor connected to said second signal invertor, a two input fourth Nor gate connected to said second delayed signal invertor, a two input fifth Nor gate connected to the first input of said fourth Nor gate, the second input of said fourth Nor gate being connected to the output of said first Nor gate, means connecting said second signal supply means to the first input of said fifth Nor gate and supplying a 1 signal thereto below a predetermined engine speed and a 0 signal thereto above said predetermined engine speed, and means connected to the second input of said fifth Nor gate and supplying a 1 signal thereto during the starting period of said engine.

Claim 10

A control device according to claim 7 which includes a third delayed signal invertor connected between a third input of said first Nor gate and said first input of said fourth Nor gate.