2. Mixed gas control valve
GM mixture of a much wider application of control valves, and other feedback carburetor mixture control waveform is slightly different in appearance, but they show the same signal determine the scale and pattern very similar to the emergence of the fuel in the carburetor feedback control system control signals in the mixture is the most important output signal, in the General Motors on the pulse of this circuit about 10 times per second, each individual pulse (pulse width or open time) changes, according to the fuel mixture ratio needs.
In General Motors, this circuit control the carburetor in a low position (rare location) pore volume of the main jet needle time of each pulse. In other systems, mixed-gas control circuit to control the air solenoid valve, when air moves into the main channel or the volume of holes into the pipeline so-thinning mixture. Most of the feedback carburetor systems work the same way, and a longer open time of the mixture means that the issue of control of the mixed gas-thinning command.
Typically, from the engine control computer to control orders, all around the 50 percent duty cycle is greater than the scope of fluctuation.
This means that the system is to control the mixture in dilute state a strong case for long-term compensation plays a role (for example, thick carburetor adjustment), on the contrary from the engine control computer to issue commands to control around 50 percent less than in the scope of the duty cycle fluctuate, it means that the control system is a mixture of dense gas in the state of the thinning of the situation from a long-term compensation (such as a vacuum leak).
In the implementation of the carburetor mixture adjustment process, the oxygen sensor must be confirmed or not working properly.
Test Method:
Start the engine and idle running at 2500 r / min about 2-3 minutes, until the engine fully warm-up, fuel to enter the closed-loop feedback control system, the process could benefit from?? An electrical equipment, confirmed that car parking in the block or gap, in accordance with the recommended maintenance steps on the carburetor overhaul to thin to stop the air leakage and idle mixture adjustment.
Waveform results:
When the pore volume of the main pipes or carbon monoxide to adjust the appropriate circuit, the duty cycle control signal mixture to about 50% of fluctuations in the duty cycle of the cursor on the oscilloscope can be used to check or calibration in accordance with waveform display analysis, automotive oscilloscope can be duty cycle values and waveform displayed on the oscilloscope at the same time.
Waveform with the screen calibration is not difficult to adjust the mixing ratio if the carburetor settings are correct,峰秃waveform will be concentrated between the two falling edge, the peak is controlled by the engine computer caused the grounding circuit to see Waveform examples of note to observe the control box where computer access and cut off the circuit. When the main hole and the volume adjusted idle mixture set correctly in the peak slightly from right to left, and then return to volatility, but remain very close to falling edge waveform of the middle of the two, according to the oxygen sensor input signal to control a computer from the left the right shows the signal waveform.
When the oxygen concentration sensor signals, the control computer will control the mixing ratio of computer time for each cycle of ground (closed angle increased) to compensate for the amendment, when the oxygen sensor signal dilute, the control computer will be mixing ratio control circuit for each cycle time shortening (closed angle decreased) to compensate for the amendment. When the mixing ratio control duty cycle waveform fluctuations in the vicinity of 50%, and oxygen sensor is working correctly, the system control of the normal mixture, catalytic converters work best. In idle or 2500 r / min, or under normal driving (not including the heavy-duty processing speed), waveform display should be about 50% volatility, when the fuel feedback control system is the best performance and the possibility of the lowest emissions.
If you work in an unusual situation, (such as idle speed) waveforms in the 50% duty cycle fluctuations, but not in other normal circumstances, traffic conditions waveform display duty cycle of about 50% of the regular fluctuations in such systems necessary to get the maximum compensation mixing ratio (from the dilute side to the strong side), when the waveform of the peak movement to the right when the computer is being issued to control dilute mixture of order, here are based on the output of oxygen sensor high voltage.
3. Bosch (BOSCH) frequency mixing ratio adjustment valve
Bosch (BOSCH) CIS system is the late 70s, has still see cars in Europe on the installation of mechanical multi-point fuel injection system. CIS fuel injection system valve used to maintain the frequency of changes in traffic conditions in the right to control the fuel. All Bosch CIS frequency valve waveform (the frequency of valves in addition to Mercedes-Benz) and operation of all shapes and examples of similar frequency Benz valves have different drivers and waveform, but the same operation mode. Valve frequency signal is Bosch CIS fuel feedback control system of the main output signal, the circuit is large pulse frequency 70Hz. This frequency is the same, regardless of engine speed and load changes, which are maintained at a frequency of 70Hz. However, on-off time (pulse angle closure) as the oxygen sensor signals to the control computer to change.
In the CIS system, the pulse control circuit on the length of time to change the fuel dispenser in the room under the pressure of a hydraulic valve, when the differential pressure of the hydraulic valve to reduce the next room, it so that more fuel flows through the room, increase the fuel concentration mixing ratio.
Computer from the control valve of the order issued to the frequency signal is greater than 50% duty cycle means that the system of control into the thick mixture, which is rare in the state of compensation for a long time (for example, dilute the carbon monoxide to adjust or vacuum leak). On the contrary, from the valve control computer commands sent to the frequency signal is less than 50% duty cycle means that the system to control access to dilute mixture, which is compensation for a long time the state of concentration (for example, adjust the concentration of carbon monoxide or high fuel pressure). Do this in the mixing ratio of fuel (carbon monoxide values) before the adjustment, make sure that oxygen sensor is working correctly.
2. Mixed gas control valve GM mixture of a much wider application of control valves, and other feedback carburetor mixture control waveform is slightly different in appearance, but they show the same signal determine the scale and pattern very similar to the emergence of the fuel in the carburetor feedback control system control signals in the mixture is the most important output signal, in the General Motors on the pulse of this circuit about 10 times per second, each individual pulse (pulse width or open time) changes, according to the fuel mixture ratio needs. In General Motors, this circuit control the carburetor in a low position (rare location) pore volume of the main jet needle time of each pulse. In other systems, mixed-gas control circuit to control the air solenoid valve, when air moves into the main channel or the volume of holes into the pipeline so-thinning mixture. Most of the feedback carburetor systems work the same way, and a longer open time of the mixture means that the issue of control of the mixed gas-thinning command. Typically, from the engine control computer to control orders, all around the 50 percent duty cycle is greater than the scope of fluctuation. This means that the system is to control the mixture in dilute state a strong case for long-term compensation plays a role (for example, thick carburetor adjustment), on the contrary from the engine control computer to issue commands to control around 50 percent less than in the scope of the duty cycle fluctuate, it means that the control system is a mixture of dense gas in the state of the thinning of the situation from a long-term compensation (such as a vacuum leak). In the implementation of the carburetor mixture adjustment process, the oxygen sensor must be confirmed or not working properly. Test Method: Start the engine and idle running at 2500 r / min about 2-3 minutes, until the engine fully warm-up, fuel to enter the closed-loop feedback control system, the process could benefit from?? An electrical equipment, confirmed that car parking in the block or gap, in accordance with the recommended maintenance steps on the carburetor overhaul to thin to stop the air leakage and idle mixture adjustment. Waveform results: When the pore volume of the main pipes or carbon monoxide to adjust the appropriate circuit, the duty cycle control signal mixture to about 50% of fluctuations in the duty cycle of the cursor on the oscilloscope can be used to check or calibration in accordance with waveform display analysis, automotive oscilloscope can be duty cycle values and waveform displayed on the oscilloscope at the same time. Waveform with the screen calibration is not difficult to adjust the mixing ratio if the carburetor settings are correct,峰秃waveform will be concentrated between the two falling edge, the peak is controlled by the engine computer caused the grounding circuit to see Waveform examples of note to observe the control box where computer access and cut off the circuit. When the main hole and the volume adjusted idle mixture set correctly in the peak slightly from right to left, and then return to volatility, but remain very close to falling edge waveform of the middle of the two, according to the oxygen sensor input signal to control a computer from the left the right shows the signal waveform. When the oxygen concentration sensor signals, the control computer will control the mixing ratio of computer time for each cycle of ground (closed angle increased) to compensate for the amendment, when the oxygen sensor signal dilute, the control computer will be mixing ratio control circuit for each cycle time shortening (closed angle decreased) to compensate for the amendment. When the mixing ratio control duty cycle waveform fluctuations in the vicinity of 50%, and oxygen sensor is working correctly, the system control of the normal mixture, catalytic converters work best. In idle or 2500 r / min, or under normal driving (not including the heavy-duty processing speed), waveform display should be about 50% volatility, when the fuel feedback control system is the best performance and the possibility of the lowest emissions. If you work in an unusual situation, (such as idle speed) waveforms in the 50% duty cycle fluctuations, but not in other normal circumstances, traffic conditions waveform display duty cycle of about 50% of the regular fluctuations in such systems necessary to get the maximum compensation mixing ratio (from the dilute side to the strong side), when the waveform of the peak movement to the right when the computer is being issued to control dilute mixture of order, here are based on the output of oxygen sensor high voltage. 3. Bosch (BOSCH) frequency mixing ratio adjustment valve Bosch (BOSCH) CIS system is the late 70s, has still see cars in Europe on the installation of mechanical multi-point fuel injection system. CIS fuel injection system valve used to maintain the frequency of changes in traffic conditions in the right to control the fuel. All Bosch CIS frequency valve waveform (the frequency of valves in addition to Mercedes-Benz) and operation of all shapes and examples of similar frequency Benz valves have different drivers and waveform, but the same operation mode. Valve frequency signal is Bosch CIS fuel feedback control system of the main output signal, the circuit is large pulse frequency 70Hz. This frequency is the same, regardless of engine speed and load changes, which are maintained at a frequency of 70Hz. However, on-off time (pulse angle closure) as the oxygen sensor signals to the control computer to change. In the CIS system, the pulse control circuit on the length of time to change the fuel dispenser in the room under the pressure of a hydraulic valve, when the differential pressure of the hydraulic valve to reduce the next room, it so that more fuel flows through the room, increase the fuel concentration mixing ratio. Computer from the control valve of the order issued to the frequency signal is greater than 50% duty cycle means that the system of control into the thick mixture, which is rare in the state of compensation for a long time (for example, dilute the carbon monoxide to adjust or vacuum leak). On the contrary, from the valve control computer commands sent to the frequency signal is less than 50% duty cycle means that the system to control access to dilute mixture, which is compensation for a long time the state of concentration (for example, adjust the concentration of carbon monoxide or high fuel pressure). Do this in the mixing ratio of fuel (carbon monoxide values) before the adjustment, make sure that oxygen sensor is working correctly. 2. Mixed gas control valve GM mixture of a much wider application of control valves, and other feedback carburetor mixture control waveform is slightly different in appearance, but they show the same signal determine the scale and pattern very similar to the emergence of the fuel in the carburetor feedback control system control signals in the mixture is the most important output signal, in the General Motors on the pulse of this circuit about 10 times per second, each individual pulse (pulse width or open time) changes, according to the fuel mixture ratio needs. In General Motors, this circuit control the carburetor in a low position (rare location) pore volume of the main jet needle time of each pulse. In other systems, mixed-gas control circuit to control the air solenoid valve, when air moves into the main channel or the volume of holes into the pipeline so-thinning mixture. Most of the feedback carburetor systems work the same way, and a longer open time of the mixture means that the issue of control of the mixed gas-thinning command. Typically, from the engine control computer to control orders, all around the 50 percent duty cycle is greater than the scope of fluctuation. This means that the system is to control the mixture in dilute state a strong case for long-term compensation plays a role (for example, thick carburetor adjustment), on the contrary from the engine control computer to issue commands to control around 50 percent less than in the scope of the duty cycle fluctuate, it means that the control system is a mixture of dense gas in the state of the thinning of the situation from a long-term compensation (such as a vacuum leak). In the implementation of the carburetor mixture adjustment process, the oxygen sensor must be confirmed or not working properly. Test Method: Start the engine and idle running at 2500 r / min about 2-3 minutes, until the engine fully warm-up, fuel to enter the closed-loop feedback control system, the process could benefit from?? An electrical equipment, confirmed that car parking in the block or gap, in accordance with the recommended maintenance steps on the carburetor overhaul to thin to stop the air leakage and idle mixture adjustment. Waveform results: When the pore volume of the main pipes or carbon monoxide to adjust the appropriate circuit, the duty cycle control signal mixture to about 50% of fluctuations in the duty cycle of the cursor on the oscilloscope can be used to check or calibration in accordance with waveform display analysis, automotive oscilloscope can be duty cycle values and waveform displayed on the oscilloscope at the same time. Waveform with the screen calibration is not difficult to adjust the mixing ratio if the carburetor settings are correct,峰秃waveform will be concentrated between the two falling edge, the peak is controlled by the engine computer caused the grounding circuit to see Waveform examples of note to observe the control box where computer access and cut off the circuit. When the main hole and the volume adjusted idle mixture set correctly in the peak slightly from right to left, and then return to volatility, but remain very close to falling edge waveform of the middle of the two, according to the oxygen sensor input signal to control a computer from the left the right shows the signal waveform. When the oxygen concentration sensor signals, the control computer will control the mixing ratio of computer time for each cycle of ground (closed angle increased) to compensate for the amendment, when the oxygen sensor signal dilute, the control computer will be mixing ratio control circuit for each cycle time shortening (closed angle decreased) to compensate for the amendment. When the mixing ratio control duty cycle waveform fluctuations in the vicinity of 50%, and oxygen sensor is working correctly, the system control of the normal mixture, catalytic converters work best. In idle or 2500 r / min, or under normal driving (not including the heavy-duty processing speed), waveform display should be about 50% volatility, when the fuel feedback control system is the best performance and the possibility of the lowest emissions. If you work in an unusual situation, (such as idle speed) waveforms in the 50% duty cycle fluctuations, but not in other normal circumstances, traffic conditions waveform display duty cycle of about 50% of the regular fluctuations in such systems necessary to get the maximum compensation mixing ratio (from the dilute side to the strong side), when the waveform of the peak movement to the right when the computer is being issued to control dilute mixture of order, here are based on the output of oxygen sensor high voltage. 3. Bosch (BOSCH) frequency mixing ratio adjustment valve Bosch (BOSCH) CIS system is the late 70s, has still see cars in Europe on the installation of mechanical multi-point fuel injection system. CIS fuel injection system valve used to maintain the frequency of changes in traffic conditions in the right to control the fuel. All Bosch CIS frequency valve waveform (the frequency of valves in addition to Mercedes-Benz) and operation of all shapes and examples of similar frequency Benz valves have different drivers and waveform, but the same operation mode. Valve frequency signal is Bosch CIS fuel feedback control system of the main output signal, the circuit is large pulse frequency 70Hz. This frequency is the same, regardless of engine speed and load changes, which are maintained at a frequency of 70Hz. However, on-off time (pulse angle closure) as the oxygen sensor signals to the control computer to change. In the CIS system, the pulse control circuit on the length of time to change the fuel dispenser in the room under the pressure of a hydraulic valve, when the differential pressure of the hydraulic valve to reduce the next room, it so that more fuel flows through the room, increase the fuel concentration mixing ratio. Computer from the control valve of the order issued to the frequency signal is greater than 50% duty cycle means that the system of control into the thick mixture, which is rare in the state of compensation for a long time (for example, dilute the carbon monoxide to adjust or vacuum leak). On the contrary, from the valve control computer commands sent to the frequency signal is less than 50% duty cycle means that the system to control access to dilute mixture, which is compensation for a long time the state of concentration (for example, adjust the concentration of carbon monoxide or high fuel pressure). Do this in the mixing ratio of fuel (carbon monoxide values) before the adjustment, make sure that oxygen sensor is working correctly. ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve Three way ball valve V Type Ball Valve
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