US 12,228,087 B2
System for controlling an electronic throttle body
Andreas D. Dixon, Cass City, MI (US); and Bradley J. Roche, Millington, MI (US)
Assigned to Walbro LLC, Cass City, MI (US)
Appl. No. 18/280,409
Filed by Walbro LLC, Cass City, MI (US)
PCT Filed Mar. 24, 2022, PCT No. PCT/US2022/021656
§ 371(c)(1), (2) Date Sep. 5, 2023,
PCT Pub. No. WO2022/204354, PCT Pub. Date Sep. 29, 2022.
Claims priority of provisional application 63/166,668, filed on Mar. 26, 2021.
Prior Publication US 2024/0301837 A1, Sep. 12, 2024
Int. Cl. F02D 41/14 (2006.01); F02D 41/20 (2006.01)
CPC F02D 41/1401 (2013.01) [F02D 41/20 (2013.01); F02D 2041/1432 (2013.01); F02D 2041/202 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A system for controlling an electronic throttle body, comprising:
an engine speed setting device, comprising
a first terminal coupled to a source for a reference voltage;
a second terminal coupled to a first end of a conductor; and
means for varying a level of resistance between the first and second terminals, the level of resistance indicative of a desired engine speed and the second terminal outputting an analog engine speed signal indicative of the desired engine speed on the conductor; and,
an electronic control module, comprising
an engine speed signal processing circuit including a first resistor coupled between a first node located between the first end and a second end of the conductor and one of a voltage supply and a voltage return; and,
a controller coupled to the second end of the conductor and configured to generate a control signal for the electronic throttle body responsive to the engine speed signal, wherein the engine speed signal processing circuit includes a second resistor coupled between the first node and the other of the voltage supply and the voltage return, and wherein the engine speed signal processing circuit includes a first activation circuit for the first resistor configured to control current flow from the one of the voltage supply and the voltage return through the first resistor and a second activation circuit for the second resistor configured to control current flow from the other of the voltage supply and the voltage return through the second resistor.