Abstract: Methods and systems for improving vacuum generation for a diesel powered vehicle that includes a mechanically engine driven vacuum pump are presented. In one non-limiting example, engine idle speed may be increased in response to a number of braking events and/or a request for vacuum based on an amount of stored vacuum.

Abstract: Methods and systems for improving vacuum generation for a diesel powered vehicle that includes a mechanically engine driven vacuum pump are presented. In one non-limiting example, engine idle speed may be increased in response to a number of braking events and/or a request for vacuum based on an amount of stored vacuum.

Abstract: Method and device for controlling a vacuum apparatus. A method for controlling a vacuum apparatus that applies vacuum to a vacuum accumulator with a pump of a pneumatically operated servo unit of a motor vehicle. The method comprises the steps of determining the pressure in the vacuum accumulator; determining the ambient pressure; adapting a pump control signal to the ambient pressure; comparing the pressure in the vacuum accumulator with an adapted pump control signal; and outputting a pump actuation signal that is a function of the comparison.

Abstract: Method and device for controlling a vacuum apparatus. A method for controlling a vacuum apparatus that applies vacuum to a vacuum accumulator with a pump of a pneumatically operated servo unit of a motor vehicle. The method comprises the steps of determining the pressure in the vacuum accumulator; determining the ambient pressure; adapting a pump control signal to the ambient pressure; comparing the pressure in the vacuum accumulator with an adapted pump control signal; and outputting a pump actuation signal that is a function of the comparison.

Abstract: Method and device for controlling a vacuum apparatus. A method for controlling a vacuum apparatus that applies vacuum to a vacuum accumulator with a pump of a pneumatically operated servo unit of a motor vehicle. The method comprises the steps of determining the pressure in the vacuum accumulator; determining the ambient pressure; adapting a pump control signal to the ambient pressure; comparing the pressure in the vacuum accumulator with an adapted pump control signal; and outputting a pump actuation signal that is a function of the comparison.

Abstract: A hybrid electric vehicle includes an internal combustion engine, a high voltage traction battery, an electric motor powered by the traction battery, an electric air conditioning (AC) system, and a controller. The controller is programmed to start the vehicle. The vehicle is started by, if a climate control demand requires cooling: (a) if a vehicle start request is a remote start request, starting the engine; (b) if the vehicle start request is a local start request, avoiding starting the engine to provide a silent start.

Abstract: Method and device for controlling a vacuum apparatus. A method for controlling a vacuum apparatus that applies vacuum to a vacuum accumulator with a pump of a pneumatically operated servo unit of a motor vehicle. The method comprises the steps of determining the pressure in the vacuum accumulator; determining the ambient pressure; adapting a pump control signal to the ambient pressure; comparing the pressure in the vacuum accumulator with an adapted pump control signal; and outputting a pump actuation signal that is a function of the comparison.

Abstract: A hybrid electric vehicle includes an internal combustion engine, a high voltage traction battery, an electric motor powered by the traction battery, an electric air conditioning (AC) system, and a controller. The controller is programmed to start the vehicle. The vehicle is started by, if a climate control demand requires cooling: (a) if a vehicle start request is a remote start request, starting the engine; (b) if the vehicle start request is a local start request, avoiding starting the engine to provide a silent start.