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Method for varying vehicle engine braking torque using discretionary active fuel management

A technology of active fuel management and engine cylinder, applied in engine control, machine/engine, fuel injection control, etc.

Active Publication Date: 2021-05-14
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in controlling the engine and power train when utilizing active fuel management

Method used

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  • Method for varying vehicle engine braking torque using discretionary active fuel management
  • Method for varying vehicle engine braking torque using discretionary active fuel management
  • Method for varying vehicle engine braking torque using discretionary active fuel management

Examples

Experimental program
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Embodiment Construction

[0020] The following description is merely exemplary in nature and is not intended to limit the disclosure, application or uses.

[0021] refer to figure 1 , an exemplary powertrain is generally indicated by the reference numeral 10 . The powertrain 10 includes an engine 12 , a transmission 14 , a driveshaft and rear differential 16 , drive wheels 18 and a powertrain control module (PCM) 20 . Sensors 21 are in communication with PCM 20 and may include, for example, an accelerator position sensor sensing instantaneous position of an accelerator pedal (not shown), a brake pedal (also not shown) position sensor sensing brake pedal position, and the like. Sensor 21 may then provide this information to PCM 20 .

[0022] The PCM 20 may calculate a driver commanded engine torque based on vehicle speed and accelerator pedal position. The PCM 20 may also use the instantaneous position of the accelerator pedal (from the accelerator pedal position sensor) to calculate the rate of acce...

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PUM

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Abstract

An intelligent active engine braking approach for discretionary active fuel management based on vehicle speed and brake pedal position. The method includes determining whether a traction mode of the vehicle has been selected and enabling all engine cylinders to ensure that maximum engine braking capacity is available. The method varies engine braking capability by disabling one or more cylinders based on vehicle speed and brake pedal position when the vehicle traction mode is not selected.

Description

technical field [0001] The present invention relates generally to automotive engine control, and more particularly to a method of varying engine braking torque of a vehicle utilizing full-autonomous active fuel management control with deceleration fuel cut-off. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may or may not constitute prior art. [0003] A typical internal combustion engine is a combination of systems that independently provide specific functions. The intake system provides throttled air to the engine. The fuel system stores, transports and regulates the flow of fuel into the engine's combustion chambers. The ignition system provides the spark that ignites the air / fuel mixture. The power conversion system converts the chemical energy of combustion into work that is transferred to the tires of the vehicle. Other systems perform the functions of improving fuel consumpti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/04F02D41/12
CPCF02D41/042F02D41/123F02D2200/602F02D2200/60F02D2200/501F02D2200/0404F02P3/04F02D13/04F02D13/06F02D2041/0012F02D2200/604F02D41/0087F02D41/0225F16H63/50
Inventor C·B·鲍曼
Owner GM GLOBAL TECH OPERATIONS LLC
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