COMMUNICATION SYSTEM, FLOW MEASURING DEVICE AND CONTROL DEVICE

• US 20160146143A1
• Filed: 10/26/2015
• Published: 05/26/2016
• Est. Priority Date: 11/21/2014
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: KOHNO, Yasushi
• Granted Patent: US 10,605,189 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F02D 2041/281 between sensors and control unit
• CPC Class Codes: F02D 2041/285 the sensor having a signal processing unit external to the engine control unit
• CPC Class Codes: F02D 41/182 for the control of a fuel injection device
• CPC Class Codes: F02M 35/10386 for flow rate air flow meters in air cleaners F02M35/021; circuit arrangements for generating control signals by measuring intake air flow F02D41/18
• CPC Class Codes: F02P 9/00 Electric spark ignition control, not otherwise provided for
• CPC Class Codes: G01F 1/6842 with means for influencing the fluid flow
• CPC Class Codes: G01F 15/022 using electrical means
• CPC Class Codes: G01F 15/043 using electrical means
• CPC Class Codes: G01F 15/066 involving magnetic transmission devices
• CPC Class Codes: G01F 5/00 Measuring a proportion of the volume flow

Abstract

A communication system includes a flow measuring device and a control device. The flow measuring device includes a flow sensor that generates a flow rate signal which is a signal in accordance with a flow rate of intake air drawn into an internal-combustion engine. The flow measuring device transmits the flow rate signal. The control device receives the flow rate signal and performs at least one of injection control of fuel to be supplied to the engine and ignition control at each cylinder of the engine based on the received flow rate signal. The flow measuring device includes a measurement-side transmitting part that transmits various signals by wireless communication, and transmits the flow rate signal by the measurement-side transmitting part. The control device includes a control-side receiving part that receives the various signals by the wireless communication, and receives the flow rate signal by the control-side receiving part.

Claims

1. A communication system for a vehicle, comprising:

a flow measuring device including a flow sensor that generates a flow rate signal which is a signal in accordance with a flow rate of intake air drawn into an internal combustion engine, wherein the flow measuring device transmits the flow rate signal; and

a control device that receives the flow rate signal and performs at least one of injection control of fuel to be supplied to the engine and ignition control at each cylinder of the engine based on the received flow rate signal, wherein;

the flow measuring device further includes a measurement-side transmitting part that transmits various signals by wireless communication, and transmits the flow rate signal by the measurement-side transmitting part; and

the control device includes a control-side receiving part that receives the various signals by the wireless communication, and receives the flow rate signal by the control-side receiving part.

2. The communication system according to claim 1, wherein:

the flow measuring device further includes an other sensor that generates signals which are respectively in accordance with various parameters other than the flow rate of intake air, and transmits the signals generated by the other sensor through the measurement-side transmitting part; and

the control device receives the signals generated by the other sensor through the control-side receiving part.

3. The communication system according to claim 2, wherein the other sensor is at least one of a temperature sensor, a humidity sensor, a pressure sensor, and an oxygen concentration sensor that generate a temperature signal, a humidity signal, a pressure signal, and an oxygen concentration signal respectively in accordance with a temperature, a humidity, a pressure, and an oxygen concentration of intake air.

4. The communication system according to claim 1, wherein:

the flow measuring device further includes a storage part that stores a flow rate output characteristic which indicates a correlation between a value expressing a level of the flow rate signal and a value of the flow rate;

the flow measuring device transmits a characteristic signal indicating the flow rate output characteristic by the measurement-side transmitting part; and

the control device receives the characteristic signal by the control-side receiving part.

5. The communication system according to claim 1 wherein:

the control device further includes a control-side transmitting part that transmits various signals by wireless communication, and transmits an engine information signal indicating an operational state of the engine by the control-side transmitting part;

the flow measuring device further includes a measurement-side receiving part that receives the various signal by the wireless communication, and receives the engine information signal by the measurement-side receiving part; and

the flow measuring device further includes a correcting part that corrects the flow rate signal based on the engine information signal, and transmits the corrected flow rate signal by the measurement-side transmitting part.

6. The communication system according to claim 5, wherein the engine information signal is a signal indicating at least one of a rotation speed of the engine, a number of the cylinder where fuel is injected or ignited subsequently, and a load rate of the engine.

7. A flow measuring device constituting the communication system recited in claim 1.

8. The flow measuring device according to claim 7, wherein the flow measuring device transmits an identifying signal for identifying the flow measuring device for each individual piece by the measurement-side transmitting part.

9. The flow measuring device according to claim 8, wherein the identifying signal is received by a reception destination having the strongest communication intensity.

10. A control device constituting the communication system recited in claim 1.