Variable and constant timing for breakerless ignition
AssigneeThe Bendix Corporation
InventorHoward E. Van Siclen, Jr.
Life of this patent
Estimating the term…
Abstract
A pulse generating system especially adapted for use in ignition systems of internal combustion engines including a solid state pulse triggering circuit for controlling spark timing and in which the timing is advanced with increased engine speed and can be changed independently of engine speed by a voltage biasing means. The triggering circuit can be programmed to provide any desired spark timing and can be controlled in response to a condition, such as engine fuel, temperature, pressure or other parameter.
Claims9
A triggering circuit comprising a solid state electronic switching device, pulse generating means for generating a succession of electrical trigger pulses which change amplitude in response to a condition to switch the switching device, voltage bias means connected between the pulse generating means and the switching device to change the switching time relative to the trigger pulses in response to the condition, and means for controlling the voltage on the bias means independently of pulse amplitude to control the switching time relative to the trigger pulses, the means for controlling the voltage on the bias means being connected in parallel with the bias means and including a resistor connected in parallel with a series connected second resistor and Zener diode.
An internal combustion engine having an ignition system including at least one spark plug, means for firing the spark plug including a solid state electronic switching device, and a triggering circuit for switching the electronic switching device for firing the spark plug comprising a second solid state electronic switching device, pulse generating means for generating a succession of electrical trigger pulses in timed relation to the engine and which increase in amplitude with increase in engine speed to make the second switching device electrically conductive for switching the first device, voltage bias means connected between the pulse generating means and the second switching device to advance with increase in speed the time in the engine cycle the second switching device is made conducting, and means for controlling the voltage on the bias means independently of pulse amplitude to control the time in the engine cycle the second switching device is made conducting to control spark timing, the means for controlling the voltage on the bias means being connected in parallel with the bias means and including a resistor connected in parallel with a series connected resistor and Zener diode.
An internal combustion engine having an ignition system including at least one spark plug, means for firing the spark plug including a solid state electronic switching device, and a triggering circuit for switching the electronic switching device for firing the spark plug comprising a second solid state electronic switching device, pulse generating means for generating a succession of electrical trigger pulses in timed relation to the engine and which increase in amplitude with increase in engine speed to make the second switching device electrically conductive for switching the first device, voltage bias means connected between the pulse generating means and the second switching device to advance with increase in speed the time in the engine cycle the second switching device is made conducting, and means for controlling the voltage on the bias means independently of pulse amplitude to control the time in the engine cycle the second switching device is made conducting to control spark timing, the means for controlling the voltage on the bias means including a variable voltage source connected to the bias means for providing voltages corresponding to an engine parameter.
An internal combustion engine having an ignition system including at least one spark plug, means for firing the spark plug including a solid state electronic switching device, and a triggering circuit for switching the electronic switching device for firing the spark plug comprising a second solid state electronic switching device, pulse generating means for generating a succession of electrical trigger pulses in timed relation to the engine and which increase in amplitude with increase in engine speed to make the second switching device electrically conductive for switching the first device, voltage bias means connected between the pulse generating means and the second switching device to advance with increase in speed the time in the engine cycle the second switching device is made conducting, and means for controlling the voltage on the bias means independently of pulse amplitude to control the time in the engine cycle the second switching device is made conducting to control spark timing, the means for controlling the voltage on the bias means including a computer for programming the voltage in accordance with a condition.
Dependencies are inferred from the claim text.