Coolant system bypass for engine

A method for generating commands to actuate a bypass valve of an internal combustion engine system, comprising:

• receiving signals from an ambient condition sensor, an air system sensor, and a manifold condition sensor;
• determining a desired intake manifold temperature for an intake manifold connected to an internal combustion engine based on the received signals;
• generating commands for actuating a bypass valve based on the signals and based on the desired intake manifold temperature, including:
• commands for causing the bypass valve to increase a proportion of air flow to a bypass passage when an intake manifold temperature measured with the manifold condition sensor is less than the desired intake manifold temperature, and
• commands for causing the bypass valve to decrease the proportion of the air flow to the bypass passage when the intake manifold temperature measured with the manifold condition sensor is above the desired intake manifold temperature;
• and
• actuating the bypass valve based on the commands such that air is provided to a bypass passage connected downstream of a compressor to provide compressed air to the intake manifold so as to bypass an air cooler.

An intake manifold temperature system, comprising:

• an internal combustion engine;
• an intake manifold connected to the internal combustion engine;
• an air supply system configured to supply compressed air to the internal combustion engine, the air supply system including:
• a compressor;
• an air cooler connected downstream of the compressor;
• a bypass passage connected downstream of the compressor to provide compressed air to the intake manifold so as to bypass the air cooler;
• and
• an electronically-controlled bypass valve connected downstream of the compressor and upstream of the air cooler, the bypass valve configured to:
• increase a proportion of air flow to the bypass passage, and
• decrease the proportion of air flow to the bypass passage;
• an ambient condition sensor located in a compressor intake manifold;
• an air system sensor located in a compressor output manifold;
• a manifold condition sensor located in the intake manifold connected to the internal combustion engine;
• and
• a controller configured to:
• receive temperature signals or pressure signals from the ambient condition sensor, the air system sensor, or the manifold condition sensor,
• determine, via a desired intake manifold temperature module, a desired intake manifold temperature based on the received signals;
• and
• generate commands for actuating the bypass valve based on the signals and on the desired intake manifold temperature, including:
• commands for causing the bypass valve to increase the proportion of the air flow to the bypass passage when an intake manifold temperature measured with the manifold condition sensor is less than the desired intake manifold temperature while the engine is operating at a partial load, and
• commands for causing the bypass valve to decrease the proportion of air flow to the bypass passage when the intake manifold temperature measured with the manifold condition sensor is above the desired intake manifold temperature while the engine is operating at partial load.